int *smf_jsatiles_data( Grp *igrp, size_t size, int *ntile, int *status ){
/* Local Variables */
AstFrame *frm = NULL;
AstFrameSet *fs;
JCMTState *state;
const char *trsys;
const char *trsys_last;
dim_t *hits = NULL;
dim_t *ph;
dim_t iframe;
double *gx = NULL;
double *gy = NULL;
double *p1;
double *p2;
double *px;
double *py;
double *trac1 = NULL;
double *trac2 = NULL;
double fov;
double point1[ 2 ];
double point2[ 2 ];
double search;
int *tiles = NULL;
int dim[ 2 ];
int i;
int ix;
int iy;
int lbnd[ 2 ];
int ubnd[ 2 ];
size_t ifile;
smfData *data = NULL;
smfHead *hdr = NULL;
smfJSATiling skytiling;
smf_inst_t inst = SMF__INST_NONE;
smf_inst_t instrument;
smf_subinst_t subinst;
/* Initialise */
*ntile = 0;
/* Check inherited status */
if( *status != SAI__OK ) return tiles;
/* Start an AST context so that all AST objects created in this function
are annulled automatically. */
astBegin;
/* Loop round all the input NDFs. */
trsys_last = "";
for( ifile = 1; ifile <= size && *status == SAI__OK; ifile++ ) {
/* Obtain information about the current input NDF. */
smf_open_file( igrp, ifile, "READ", SMF__NOCREATE_DATA, &data,
status );
/* Get a pointer to the header. */
hdr = data->hdr;
/* Get the instrument. */
if( hdr->instrument == INST__SCUBA2 ) {
subinst = smf_calc_subinst( hdr, status );
if( subinst == SMF__SUBINST_850 ) {
inst = SMF__INST_SCUBA_2_850;
} else {
inst = SMF__INST_SCUBA_2_450;
}
} else if( hdr->instrument == INST__ACSIS ) {
inst = SMF__INST_HARP;
} else if( *status == SAI__OK ) {
*status = SAI__ERROR;
smf_smfFile_msg( data->file, "FILE", 1, "<unknown>" );
errRep( "", "No tiles are yet defined for the instrument that "
"created ^FILE.", status );
}
/* If this is the first file, it defines the instrument in use. */
if( ifile == 1 ) {
instrument = inst;
/* Get the parameters that define the layout of sky tiles for the
instrument. */
smf_jsatiling( instrument, &skytiling, status );
/* Create a FrameSet describing the whole sky in which each pixel
corresponds to a single tile. The current Frame is ICRS (RA,Dec) and
the base Frame is grid coords in which each grid pixel corresponds to
a single tile. */
smf_jsatile( 0, &skytiling, 0, NULL, &fs, NULL, lbnd, ubnd, status );
/* Allocate an image with one pixel for each tile, and fill it with
zeros. */
dim[ 0 ] = ubnd[ 0 ] - lbnd[ 0 ] + 1;
dim[ 1 ] = ubnd[ 1 ] - lbnd[ 1 ] + 1;
hits = astCalloc( dim[0]*dim[1], sizeof( *hits ) );
/* Get the radius of the field of view in radians. */
fov = 0.5*(skytiling.fov*AST__DD2R)/3600.0;
/* If this is not the first file, report an error if the instrument has
changed... */
} else if( instrument != inst && *status == SAI__OK ) {
smf_smfFile_msg( data->file, "FILE", 1, "<unknown>" );
errRep( "", "The file ^FILE was created by a different instrument "
"to the previous files.", status );
}
/* Re-map the current Frame of the hits map WCS FrameSet to be the tracking
system used by the current file (if it has changed). */
trsys = sc2ast_convert_system( (hdr->allState)[0].tcs_tr_sys,
status );
if( *status == SAI__OK && strcmp( trsys, trsys_last ) ) {
astSetC( fs, "System", trsys );
trsys_last = trsys;
frm = astGetFrame( fs, AST__CURRENT );
}
/* Get the radius of the search circle. */
search = fov + sqrt( hdr->instap[ 0 ]*hdr->instap[ 0 ] +
hdr->instap[ 1 ]*hdr->instap[ 1 ] );
/* Ensure our work arrays are big enough to hold the current file. */
trac1 = astGrow( trac1, 4*hdr->nframes, sizeof( *trac1 ) );
trac2 = astGrow( trac2, 4*hdr->nframes, sizeof( *trac2 ) );
gx = astGrow( gx, 4*hdr->nframes, sizeof( *gx ) );
gy = astGrow( gy, 4*hdr->nframes, sizeof( *gy ) );
/* Check pointers can be used safely. */
if( *status == SAI__OK ) {
/* Loop round all time slices, getting the tracking coords at the corners
of a box that enclose the field of view. */
p1 = trac1;
p2 = trac2;
state = hdr->allState;
for( iframe = 0; iframe < hdr->nframes; iframe++,state++ ) {
point1[ 0 ] = state->tcs_tr_ac1;
point1[ 1 ] = state->tcs_tr_ac2;
for( i = 0; i < 4; i++ ) {
astOffset2( frm, point1, i*AST__DPIBY2, search, point2 );
*(p1++) = point2[ 0 ];
*(p2++) = point2[ 1 ];
}
}
/* Convert them to grid coords in the hits map. */
astTran2( fs, 4*hdr->nframes, trac1, trac2, 0, gx, gy );
/* Loop round them all again. Update the hits map to indicate how many
points fall in each tile. */
px = gx;
py = gy;
for( iframe = 0; iframe < 4*hdr->nframes; iframe++,px++,py++ ) {
ix = (int)( *px + 0.5 ) - 1;
iy = (int)( *py + 0.5 ) - 1;
hits[ ix + iy*dim[ 0 ] ]++;
}
}
/* Close the current input data file. */
smf_close_file( &data, status);
data = NULL;
}
/* Form a list of all the tiles that receive any data. */
ph = hits;
for( iy = 0; iy < dim[ 1 ]; iy++ ) {
for( ix = 0; ix < dim[ 0 ]; ix++,ph++ ) {
if( *ph > 0 ) {
tiles = astGrow( tiles, ++(*ntile), sizeof( *tiles ) );
if( *status == SAI__OK ) {
tiles[ *ntile - 1 ] = smf_jsatilexy2i( ix, iy, &skytiling,
status );
}
}
}
}
/* Free resources. */
hits = astFree( hits );
trac1 = astFree( trac1 );
trac2 = astFree( trac2 );
gx = astFree( gx );
gy = astFree( gy );
if( *status != SAI__OK ) {
tiles = astFree( tiles );
*ntile = 0;
}
astEnd;
return tiles;
}
void smf_rebinsparse( smfData *data, int first, int *ptime, AstFrame *ospecfrm,
AstMapping *ospecmap, AstSkyFrame *oskyframe,
Grp *detgrp, int lbnd_out[ 3 ], int ubnd_out[ 3 ],
int genvar, float *data_array, float *var_array,
int *ispec, float *texp_array, float *teff_array,
double *fcon, int *status ){
/* Local Variables */
AstCmpMap *fmap = NULL; /* Mapping from spectral grid to topo freq Hz */
AstCmpMap *ssmap = NULL; /* I/p GRID-> o/p PIXEL Mapping for spectral axis */
AstFitsChan *fc = NULL; /* Storage for FITS headers */
AstFrame *specframe = NULL; /* Spectral Frame in input FrameSet */
AstFrame *specframe2 = NULL; /* Temporary copy of SpecFrame in input WCS */
AstFrameSet *fs = NULL; /* A general purpose FrameSet pointer */
AstFrameSet *swcsin = NULL; /* FrameSet describing spatial input WCS */
AstMapping *fsmap = NULL; /* Base->Current Mapping extracted from a FrameSet */
AstMapping *specmap = NULL; /* PIXEL -> Spec mapping in input FrameSet */
char *fftwin = NULL; /* Name of FFT windowing function */
const char *name = NULL; /* Pointer to current detector name */
const double *tsys=NULL; /* Pointer to Tsys value for first detector */
dim_t timeslice_size; /* No of detector values in one time slice */
double *spectab = NULL;/* Workspace for spectral output grid positions */
double *xin = NULL; /* Workspace for detector input grid positions */
double *xout = NULL; /* Workspace for detector output pixel positions */
double *yin = NULL; /* Workspace for detector input grid positions */
double *yout = NULL; /* Workspace for detector output pixel positions */
double at; /* Frequency at which to take the gradient */
double dnew; /* Channel width in Hz */
double fcon2; /* Variance factor for whole file */
double k; /* Back-end degradation factor */
double tcon; /* Variance factor for whole time slice */
float *pdata = NULL; /* Pointer to next data sample */
float *qdata = NULL; /* Pointer to next data sample */
float rtsys; /* Tsys value */
float teff; /* Effective integration time, times 4 */
float texp; /* Total time ( = ton + toff ) */
float toff; /* Off time */
float ton; /* On time */
int *nexttime = NULL; /* Pointer to next time slice index to use */
int dim[ 3 ]; /* Output array dimensions */
int found; /* Was current detector name found in detgrp? */
int good; /* Are there any good detector samples? */
int ibasein; /* Index of base Frame in input FrameSet */
int ichan; /* Index of current channel */
int iv; /* Offset to next element */
int iz; /* Output grid index on axis 3 */
int nchan; /* Number of input spectral channels */
int pixax[ 3 ]; /* The output fed by each selected mapping input */
int specax; /* Index of spectral axis in input FrameSet */
size_t irec; /* Index of current input detector */
size_t itime; /* Index of current time slice */
smfHead *hdr = NULL; /* Pointer to data header for this time slice */
/* Check inherited status */
if( *status != SAI__OK ) return;
/* Begin an AST context.*/
astBegin;
/* Store a pointer to the input NDFs smfHead structure. */
hdr = data->hdr;
/* Store the dimensions of the output array. */
dim[ 0 ] = ubnd_out[ 0 ] - lbnd_out[ 0 ] + 1;
dim[ 1 ] = ubnd_out[ 1 ] - lbnd_out[ 1 ] + 1;
dim[ 2 ] = ubnd_out[ 2 ] - lbnd_out[ 2 ] + 1;
/* Store the number of pixels in one time slice */
timeslice_size = (data->dims)[ 0 ]*(data->dims)[ 1 ];
/* We want a description of the spectral WCS axis in the input file. If
the input file has a WCS FrameSet containing a SpecFrame, use it,
otherwise we will obtain it from the FITS header later. NOTE, if we knew
that all the input NDFs would have the same spectral axis calibration,
then the spectral WCS need only be obtained from the first NDF. However,
in the general case, I presume that data files may be combined that use
different spectral axis calibrations, and so these differences need to
be taken into account. */
if( hdr->tswcs ) {
fs = astClone( hdr->tswcs );
/* The first axis should be a SpecFrame. See if this is so. If not annul
the specframe pointer. */
specax = 1;
specframe = astPickAxes( fs, 1, &specax, NULL );
if( !astIsASpecFrame( specframe ) ) specframe = astAnnul( specframe );
}
/* If the above did not yield a SpecFrame, use the FITS-WCS headers in the
FITS extension of the input NDF. Take a copy of the FITS header (so that
the contents of the header are not changed), and then read a FrameSet
out of it. */
if( !specframe ) {
fc = astCopy( hdr->fitshdr );
astClear( fc, "Card" );
fs = astRead( fc );
/* Extract the SpecFrame that describes the spectral axis from the current
Frame of this FrameSet. This is assumed to be the third WCS axis (NB
the different axis number). */
specax = 3;
specframe = astPickAxes( fs, 1, &specax, NULL );
}
/* Split off the 1D Mapping for this single axis from the 3D Mapping for
the whole WCS. This results in "specmap" holding the Mapping from
SpecFrame value to GRID value. */
fsmap = astGetMapping( fs, AST__CURRENT, AST__BASE );
astMapSplit( fsmap, 1, &specax, pixax, &specmap );
/* Invert the Mapping for the spectral axis so that it goes from input GRID
coord to spectral coord. */
astInvert( specmap );
/* Get a Mapping that converts values in the input spectral system to the
corresponding values in the output spectral system. */
fs = astConvert( specframe, ospecfrm, "" );
/* Concatenate these Mappings with the supplied spectral Mapping to get
a Mapping from the input spectral grid axis (pixel axis 1) to the
output spectral grid axis (pixel axis 3). Simplify the Mapping. */
ssmap = astCmpMap( astCmpMap( specmap, astGetMapping( fs, AST__BASE,
AST__CURRENT ),
1, " " ),
ospecmap, 1, " " );
ssmap = astSimplify( ssmap );
/* Create a table with one element for each channel in the input array,
holding the index of the nearest corresponding output channel. */
nchan = (data->dims)[ 0 ];
spectab = astMalloc( sizeof( *spectab )*nchan );
if( spectab ) {
for( ichan = 0; ichan < nchan; ichan++ ) spectab[ ichan ] = ichan + 1;
astTran1( ssmap, nchan, spectab, 1, spectab );
for( ichan = 0; ichan < nchan; ichan++ ) {
if( spectab[ ichan ] != AST__BAD ) {
iz = floor( spectab[ ichan ] + 0.5 );
if( iz >= 1 && iz <= dim[ 2 ] ) {
spectab[ ichan ] = iz;
} else {
spectab[ ichan ] = 0;
}
} else {
spectab[ ichan ] = 0;
}
}
}
/* Allocate work arrays big enough to hold the coords of all the
detectors in the current input file.*/
xin = astMalloc( (data->dims)[ 1 ] * sizeof( *xin ) );
yin = astMalloc( (data->dims)[ 1 ] * sizeof( *yin ) );
xout = astMalloc( (data->dims)[ 1 ] * sizeof( *xout ) );
yout = astMalloc( (data->dims)[ 1 ] * sizeof( *yout ) );
/* Initialise a string to point to the name of the first detector for which
data is available */
name = hdr->detname;
/* Store input coords for the detectors. Axis 1 is the detector index, and
axis 2 is a dummy axis that always has the value 1. */
for( irec = 0; irec < (data->dims)[ 1 ]; irec++ ) {
xin[ irec ] = irec + 1.0;
yin[ irec ] = 1.0;
/* If a group of detectors to be used was supplied, search the group for
the name of the current detector. If not found, set the GRID coords bad. */
if( detgrp ) {
found = grpIndex( name, detgrp, 1, status );
if( !found ) {
xin[ irec ] = AST__BAD;
yin[ irec ] = AST__BAD;
}
}
/* Move on to the next available detector name. */
name += strlen( name ) + 1;
}
/* Find the constant factor associated with the current input file. This
is the squared backend degradation factor, divided by the noise bandwidth.
Get the required FITS headers, checking they were found. */
if( astGetFitsF( hdr->fitshdr, "BEDEGFAC", &k ) &&
astGetFitsS( hdr->fitshdr, "FFT_WIN", &fftwin ) ){
/* Get a Mapping that converts values in the input spectral system to
topocentric frequency in Hz, and concatenate this Mapping with the
Mapping from input GRID coord to the input spectral system. The result
is a Mapping from input GRID coord to topocentric frequency in Hz. */
specframe2 = astCopy( specframe );
astSet( specframe2, "system=freq,stdofrest=topo,unit=Hz" );
fmap = astCmpMap( specmap, astGetMapping( astConvert( specframe,
specframe2,
"" ),
AST__BASE, AST__CURRENT ),
1, " " );
/* Differentiate this Mapping at the mid channel position to get the width
of an input channel in Hz. */
at = 0.5*nchan;
dnew = astRate( fmap, &at, 1, 1 );
/* Modify the channel width to take account of the effect of the FFT windowing
function. Allow undef value because FFT_WIN for old data had a broken value
in hybrid subband modes. */
if( dnew != AST__BAD ) {
dnew = fabs( dnew );
if( !strcmp( fftwin, "truncate" ) ) {
dnew *= 1.0;
} else if( !strcmp( fftwin, "hanning" ) ) {
dnew *= 1.5;
} else if( !strcmp( fftwin, "<undefined>" ) ) {
/* Deal with broken data - make an assumption */
dnew *= 1.0;
} else if( *status == SAI__OK ) {
*status = SAI__ERROR;
msgSetc( "W", fftwin );
errRep( FUNC_NAME, "FITS header FFT_WIN has unknown value "
"'^W' (programming error).", status );
}
/* Form the required constant. */
fcon2 = k*k/dnew;
} else {
fcon2 = VAL__BADD;
}
} else {
fcon2 = VAL__BADD;
}
/* Return the factor needed for calculating Tsys from the variance. */
if( first ) {
*fcon = fcon2;
} else if( fcon2 != *fcon ) {
*fcon = VAL__BADD;
}
/* Initialise a pointer to the next time slice index to be used. */
nexttime = ptime;
/* Loop round all the time slices in the input file. */
for( itime = 0; itime < (data->dims)[ 2 ] && *status == SAI__OK; itime++ ) {
/* If this time slice is not being pasted into the output cube, pass on. */
if( nexttime ){
if( *nexttime != itime ) continue;
nexttime++;
}
/* Store a pointer to the first input data value in this time slice. */
pdata = ( (float *) (data->pntr)[ 0 ] ) + itime*timeslice_size;
/* Get a FrameSet describing the spatial coordinate systems associated with
the current time slice of the current input data file. The base frame in
the FrameSet will be a 2D Frame in which axis 1 is detector number and
axis 2 is unused. The current Frame will be a SkyFrame (the SkyFrame
System may be any of the JCMT supported systems). The Epoch will be
set to the epoch of the time slice. */
smf_tslice_ast( data, itime, 1, NO_FTS, status );
swcsin = hdr->wcs;
/* Note the total exposure time (texp) for all the input spectra produced by
this time slice. */
ton = hdr->state->acs_exposure;
if( ton == 0.0 ) ton = VAL__BADR;
toff = hdr->state->acs_offexposure;
if( toff == 0.0 ) toff = VAL__BADR;
if( ton != VAL__BADR && toff != VAL__BADR ) {
texp = ton + toff;
teff = 4*ton*toff/( ton + toff );
} else {
texp = VAL__BADR;
teff = VAL__BADR;
}
/* If output variances are being calculated on the basis of Tsys values
in the input, find the constant factor associated with the current
time slice. */
tcon = AST__BAD;
if( genvar == 2 && fcon2 != AST__BAD && texp != VAL__BADR ) {
tcon = fcon2*( 1.0/ton + 1.0/toff );
/* Get a pointer to the start of the Tsys values for this time slice. */
tsys = hdr->tsys + hdr->ndet*itime;
}
/* We now create a Mapping from detector index to position in oskyframe. */
astInvert( swcsin );
ibasein = astGetI( swcsin, "Base" );
fs = astConvert( swcsin, oskyframe, "SKY" );
astSetI( swcsin, "Base", ibasein );
astInvert( swcsin );
if( fs == NULL ) {
if( *status == SAI__OK ) {
if (data->file) {
smf_smfFile_msg(data->file, "FILE", 1, "<unknown>");
} else {
msgSetc( "FILE", "<unknown>" );
}
*status = SAI__ERROR;
errRep( FUNC_NAME, "The spatial coordinate system in ^FILE "
"is not compatible with the spatial coordinate "
"system in the first input file.", status );
}
break;
}
/* Transform the positions of the detectors from input GRID to oskyframe
coords. */
astTran2( fs, (data->dims)[ 1 ], xin, yin, 1, xout, yout );
/* Loop round all detectors. */
for( irec = 0; irec < (data->dims)[ 1 ]; irec++ ) {
/* If the detector has a valid position, see if it produced any good
data values. */
if( xout[ irec ] != AST__BAD && yout[ irec ] != AST__BAD ) {
qdata = pdata;
good = 0;
for( ichan = 0; ichan < nchan; ichan++ ){
if( *(qdata++) != VAL__BADR ) {
good = 1;
break;
}
}
/* If it did, calculate the variance associated with each detector
sample (if required), based on the input Tsys values, and copy the
spectrum to the output NDF. */
if( good ) {
if( *ispec < dim[ 0 ] ){
rtsys = tsys ? (float) tsys[ irec ] : VAL__BADR;
if( rtsys <= 0.0 ) rtsys = VAL__BADR;
if( tcon != AST__BAD && genvar == 2 && rtsys != VAL__BADR ) {
var_array[ *ispec ] = tcon*rtsys*rtsys;
} else if( var_array ) {
var_array[ *ispec ] = VAL__BADR;
}
if( texp != VAL__BADR ) {
texp_array[ *ispec ] = texp;
teff_array[ *ispec ] = teff;
}
for( ichan = 0; ichan < nchan; ichan++, pdata++ ) {
iz = spectab[ ichan ] - 1;
if( iz >= 0 && iz < dim[ 2 ] ) {
iv = *ispec + dim[ 0 ]*iz;
data_array[ iv ] = *pdata;
}
}
(*ispec)++;
} else if( *status == SAI__OK ){
*status = SAI__ERROR;
msgSeti( "DIM", dim[ 0 ] );
errRep( " ", "Too many spectra (more than ^DIM) for "
"the output NDF (programming error).", status );
break;
}
/* If this detector does not have any valid data values, increment the data
pointer to point at the first sample for the next detector. */
} else {
pdata += nchan;
}
/* If this detector does not have a valid position, increment the data
pointer to point at the first sample for the next detector. */
} else {
pdata += nchan;
}
}
/* For efficiency, explicitly annul the AST Objects created in this tight
loop. */
fs = astAnnul( fs );
}
/* Free resources */
spectab = astFree( spectab );
xin = astFree( xin );
yin = astFree( yin );
xout = astFree( xout );
yout = astFree( yout );
/* End the AST context. This will annul all AST objects created within the
context (except for those that have been exported from the context). */
astEnd;
}
void smf_resampcube_nn( smfData *data, dim_t nchan,
dim_t ndet, dim_t nslice, dim_t nxy,
dim_t dim[3], AstMapping *ssmap,
AstSkyFrame *abskyfrm, AstMapping *iskymap,
Grp *detgrp, int moving, float *in_data,
float *out_data, int *overlap, int *status ){
/* Local Variables */
AstMapping *totmap = NULL; /* WCS->GRID Mapping from template WCS FrameSet */
const char *name = NULL; /* Pointer to current detector name */
dim_t timeslice_size; /* No of detector values in one time slice */
double *detxtemplt = NULL; /* Work space for template X grid coords */
double *detxskycube = NULL; /* Work space for sky cube X grid coords */
double *detytemplt = NULL; /* Work space for template Y grid coords */
double *detyskycube = NULL; /* Work space for sky cube Y grid coords */
float *ddata = NULL; /* Pointer to start of output detector data */
float *tdata = NULL; /* Pointer to start of sky cube time slice data */
int *spectab = NULL; /* Template->sky cube channel number conversion table */
int found; /* Was current detector name found in detgrp? */
dim_t gxsky; /* Sky cube X grid index */
dim_t gysky; /* Sky cube Y grid index */
dim_t idet; /* Detector index */
dim_t itime; /* Index of current time slice */
int iv0; /* Offset for pixel in 1st sky cube spectral channel */
smfHead *hdr = NULL; /* Pointer to data header for this time slice */
/* Initialise */
*overlap = 0;
/* Check the inherited status. */
if( *status != SAI__OK ) return;
/* Store a pointer to the template NDFs smfHead structure. */
hdr = data->hdr;
/* Store the number of pixels in one time slice */
timeslice_size = ndet*nchan;
/* Use the supplied mapping to get the zero-based sky cube channel number
corresponding to each template channel number. */
smf_rebincube_spectab( nchan, dim[ 2 ], ssmap, &spectab, status );
if( !spectab ) goto L999;
/* Allocate work arrays to hold the template and sky cube grid coords for each
detector. */
detxtemplt = astMalloc( ndet*sizeof( double ) );
detytemplt = astMalloc( ndet*sizeof( double ) );
detxskycube = astMalloc( ndet*sizeof( double ) );
detyskycube = astMalloc( ndet*sizeof( double ) );
/* Initialise a string to point to the name of the first detector for which
data is to be created. */
name = hdr->detname;
/* Fill the arrays with the grid coords of each detector. */
for( idet = 0; idet < ndet; idet++ ) {
detxtemplt[ idet ] = (double) idet + 1.0;
detytemplt[ idet ] = 1.0;
/* If a group of detectors to be used was supplied, search the group for
the name of the current detector. If not found, set the GRID coord
bad. */
if( detgrp ) {
found = grpIndex( name, detgrp, 1, status );
if( !found ) {
detxtemplt[ idet ] = AST__BAD;
detytemplt[ idet ] = AST__BAD;
}
}
/* Move on to the next available detector name. */
name += strlen( name ) + 1;
}
/* Loop round all time slices in the template NDF. */
for( itime = 0; itime < nslice && *status == SAI__OK; itime++ ) {
/* Store a pointer to the first output data value in this time slice. */
tdata = in_data ? ( out_data + itime*timeslice_size ) : NULL;
/* Begin an AST context. Having this context within the time slice loop
helps keep the number of AST objects in use to a minimum. */
astBegin;
/* Get a Mapping from the spatial GRID axes in the template to the spatial
GRID axes in the sky cube for the current time slice. Note this has
to be done first since it stores details of the current time slice
in the "smfHead" structure inside "data", and this is needed by
subsequent functions. */
totmap = smf_rebin_totmap( data, itime, abskyfrm, iskymap, moving,
status );
if( !totmap ) {
astEnd;
break;
}
/* Use this Mapping to get the sky cube spatial grid coords for each
template detector. */
astTran2( totmap, ndet, detxtemplt, detytemplt, 1, detxskycube,
detyskycube );
/* Loop round each detector, obtaining its output value from the sky cube. */
for( idet = 0; idet < ndet; idet++ ) {
/* Get a pointer to the start of the output spectrum data. */
ddata = tdata + idet*nchan;
/* Check the detector has a valid position in sky cube grid coords */
if( detxskycube[ idet ] != AST__BAD && detyskycube[ idet ] != AST__BAD ){
/* Find the closest sky cube pixel and check it is within the bounds of the
sky cube. */
gxsky = floor( detxskycube[ idet ] + 0.5 );
gysky = floor( detyskycube[ idet ] + 0.5 );
if( gxsky >= 1 && gxsky <= dim[ 0 ] &&
gysky >= 1 && gysky <= dim[ 1 ] ) {
/* Get the offset of the sky cube array element that corresponds to this
pixel in the first spectral channel. */
iv0 = ( gysky - 1 )*dim[ 0 ] + ( gxsky - 1 );
/* Copy the sky cube spectrum into the output time series cube. */
*overlap = 1;
if( in_data ) {
smf_resampcube_copy( nchan, spectab, iv0, nxy,
ddata, in_data, status );
} else {
break;
}
}
}
}
/* End the AST context. */
astEnd;
/* If no input data was supplied, and we have found at least one input
spectrum that overlaps the sky cube, we can finish early. */
if( !in_data && *overlap ) break;
}
/* Free non-static resources. */
L999:;
spectab = astFree( spectab );
detxtemplt = astFree( detxtemplt );
detytemplt = astFree( detytemplt );
detxskycube = astFree( detxskycube );
detyskycube = astFree( detyskycube );
}
void smf_mapbounds( int fast, Grp *igrp, int size, const char *system,
AstFrameSet *spacerefwcs, int alignsys, int *lbnd_out,
int *ubnd_out, AstFrameSet **outframeset, int *moving,
smfBox ** boxes, fts2Port fts_port, int *status ) {
/* Local Variables */
AstSkyFrame *abskyframe = NULL; /* Output Absolute SkyFrame */
int actval; /* Number of parameter values supplied */
AstMapping *bolo2map = NULL; /* Combined mapping bolo->map
coordinates, WCS->GRID Mapping from
input WCS FrameSet */
smfBox *box = NULL; /* smfBox for current file */
smfData *data = NULL; /* pointer to SCUBA2 data struct */
double dlbnd[ 2 ]; /* Floating point lower bounds for output map */
drcntrl_bits drcntrl_mask = 0;/* Mask to use for DRCONTROL on this instrument */
double dubnd[ 2 ]; /* Floating point upper bounds for output map */
AstMapping *fast_map = NULL; /* Mapping from tracking to absolute map coords */
smfFile *file = NULL; /* SCUBA2 data file information */
int first; /* Is this the first good subscan ? */
AstFitsChan *fitschan = NULL;/* Fits channels to construct WCS header */
AstFrameSet *fs = NULL; /* A general purpose FrameSet pointer */
smfHead *hdr = NULL; /* Pointer to data header this time slice */
int i; /* Loop counter */
dim_t j; /* Loop counter */
AstSkyFrame *junksky = NULL; /* Unused SkyFrame argument */
dim_t k; /* Loop counter */
int lbnd0[ 2 ]; /* Defaults for LBND parameter */
double map_pa=0; /* Map PA in output coord system (rads) */
dim_t maxloop; /* Number of times to go round the time slice loop */
dim_t nbadt = 0; /* Number of bad time slices */
dim_t ngoodt = 0; /* Number of good time slices */
double par[7]; /* Projection parameters */
double shift[ 2 ]; /* Shifts from PIXEL to GRID coords */
AstMapping *oskymap = NULL; /* Mapping celestial->map coordinates,
Sky <> PIXEL mapping in output
FrameSet */
AstSkyFrame *oskyframe = NULL;/* Output SkyFrame */
char *refsys = NULL; /* Sky system from supplied reference FrameSet */
dim_t textreme[4]; /* Time index corresponding to minmax TCS posn */
AstFrame *skyin = NULL; /* Sky Frame in input FrameSet */
double skyref[ 2 ]; /* Values for output SkyFrame SkyRef attribute */
struct timeval tv1; /* Timer */
struct timeval tv2; /* Timer */
AstMapping *tmap; /* Temporary Mapping */
int trim; /* Trim borders of bad pixels from o/p image? */
int ubnd0[ 2 ]; /* Defaults for UBND parameter */
double x_array_corners[4]; /* X-Indices for corner bolos in array */
double x_map[4]; /* Projected X-coordinates of corner bolos */
double y_array_corners[4]; /* Y-Indices for corner pixels in array */
double y_map[4]; /* Projected X-coordinates of corner bolos */
/* Main routine */
if (*status != SAI__OK) return;
/* Start a timer to see how long this takes */
smf_timerinit( &tv1, &tv2, status );
/* Initialize pointer to output FrameSet and moving-source flag */
*outframeset = NULL;
*moving = 0;
/* initialize double precision output bounds and the proj pars */
for( i = 0; i < 7; i++ ) par[ i ] = AST__BAD;
dlbnd[ 0 ] = VAL__MAXD;
dlbnd[ 1 ] = VAL__MAXD;
dubnd[ 0 ] = VAL__MIND;
dubnd[ 1 ] = VAL__MIND;
/* If we have a supplied reference WCS we can use that directly
without having to calculate it from the data. Replace the requested
system with the system from the reference FrameSet (take a copy of the
string since astGetC may re-use its buffer). */
if (spacerefwcs) {
oskyframe = astGetFrame( spacerefwcs, AST__CURRENT );
int nc = 0;
refsys = astAppendString( NULL, &nc, astGetC( oskyframe, "System" ) );
system = refsys;
}
/* Create array of returned smfBox structures and store a pointer
to the next one to be initialised. */
*boxes = astMalloc( sizeof( smfBox ) * size );
box = *boxes;
astBegin;
/* Loop over all files in the Grp */
first = 1;
for( i=1; i<=size; i++, box++ ) {
/* Initialise the spatial bounds of section of the the output cube that is
contributed to by the current ionput file. */
box->lbnd[ 0 ] = VAL__MAXD;
box->lbnd[ 1 ] = VAL__MAXD;
box->ubnd[ 0 ] = VAL__MIND;
box->ubnd[ 1 ] = VAL__MIND;
/* Read data from the ith input file in the group */
smf_open_file( NULL, igrp, i, "READ", SMF__NOCREATE_DATA, &data, status );
if (*status != SAI__OK) {
msgSeti( "I", i );
errRep( "smf_mapbounds", "Could not open data file no ^I.", status );
break;
} else {
if( *status == SAI__OK ) {
if( data->file == NULL ) {
*status = SAI__ERROR;
errRep( FUNC_NAME, "No smfFile associated with smfData.",
status );
break;
} else if( data->hdr == NULL ) {
*status = SAI__ERROR;
errRep( FUNC_NAME, "No smfHead associated with smfData.",
status );
break;
} else if( data->hdr->fitshdr == NULL ) {
*status = SAI__ERROR;
errRep( FUNC_NAME, "No FITS header associated with smfHead.",
status );
break;
}
}
}
/* convenience pointers */
file = data->file;
hdr = data->hdr;
/* report name of the input file */
smf_smfFile_msg( file, "FILE", 1, "<unknown>" );
msgSeti("I", i);
msgSeti("N", size);
msgOutif(MSG__VERB, " ",
"SMF_MAPBOUNDS: Processing ^I/^N ^FILE",
status);
/* Check that there are 3 pixel axes. */
if( data->ndims != 3 ) {
smf_smfFile_msg( file, "FILE", 1, "<unknown>" );
msgSeti( "NDIMS", data->ndims );
*status = SAI__ERROR;
errRep( FUNC_NAME, "^FILE has ^NDIMS pixel axes, should be 3.",
status );
break;
}
/* Check that the data dimensions are 3 (for time ordered data) */
if( *status == SAI__OK ) {
/* If OK Decide which detectors (GRID coord) to use for
checking bounds, depending on the instrument in use. */
switch( hdr->instrument ) {
case INST__SCUBA2:
drcntrl_mask = DRCNTRL__POSITION;
/* 4 corner bolometers of the subarray */
x_array_corners[0] = 1;
x_array_corners[1] = 1;
x_array_corners[2] = (data->dims)[0];
x_array_corners[3] = (data->dims)[0];
y_array_corners[0] = 1;
y_array_corners[1] = (data->dims)[1];
y_array_corners[2] = 1;
y_array_corners[3] = (data->dims)[1];
break;
case INST__AZTEC:
/* Rough guess for extreme bolometers around the edge */
x_array_corners[0] = 22;
x_array_corners[1] = 65;
x_array_corners[2] = 73;
x_array_corners[3] = 98;
y_array_corners[0] = 1; /* Always 1 for AzTEC */
y_array_corners[1] = 1;
y_array_corners[2] = 1;
y_array_corners[3] = 1;
break;
case INST__ACSIS:
smf_find_acsis_corners( data, x_array_corners, y_array_corners,
status);
break;
default:
*status = SAI__ERROR;
errRep(FUNC_NAME, "Don't know how to calculate mapbounds for data created with this instrument", status);
}
}
if( *status == SAI__OK) {
size_t goodidx = SMF__BADSZT;
/* Need to build up a frameset based on good telescope position.
We can not assume that we the first step will be a good TCS position
so we look for one. If we can not find anything we skip to the
next file. */
maxloop = (data->dims)[2];
for (j=0; j<maxloop; j++) {
JCMTState state = (hdr->allState)[j];
if (state.jos_drcontrol >= 0 && state.jos_drcontrol & drcntrl_mask ) {
/* bad TCS - so try again */
} else {
/* Good tcs */
goodidx = j;
break;
}
}
if (goodidx == SMF__BADSZT) {
smf_smfFile_msg( data->file, "FILE", 1, "<unknown>");
msgOutif( MSG__QUIET, "", "No good telescope positions found in file ^FILE. Ignoring",
status );
smf_close_file( NULL, &data, status );
continue;
}
/* If we are dealing with the first good file, create the output
SkyFrame. */
if( first ) {
first = 0;
/* Create output SkyFrame if it has not come from a reference */
if ( oskyframe == NULL ) {
/* smf_tslice_ast only needs to get called once to set up framesets */
if( hdr->wcs == NULL ) {
smf_tslice_ast( data, goodidx, 1, fts_port, status);
}
/* Retrieve input SkyFrame */
skyin = astGetFrame( hdr->wcs, AST__CURRENT );
smf_calc_skyframe( skyin, system, hdr, alignsys, &oskyframe, skyref,
moving, status );
/* Get the orientation of the map vertical within the output celestial
coordinate system. This is derived form the MAP_PA FITS header, which
gives the orientation of the map vertical within the tracking system. */
map_pa = smf_calc_mappa( hdr, system, skyin, status );
/* Provide a sensible default for the pixel size based on wavelength */
par[4] = smf_calc_telres( hdr->fitshdr, status );
par[4] *= AST__DD2R/3600.0;
par[5] = par[4];
/* Calculate the projection parameters. We do not enable autogrid determination
for SCUBA-2 so we do not need to obtain all the data before calculating
projection parameters. */
smf_get_projpar( oskyframe, skyref, *moving, 0, 0, NULL, 0,
map_pa, par, NULL, NULL, status );
if (skyin) skyin = astAnnul( skyin );
/* If the output skyframe has been supplied, we still need to
determine whether the source is moving or not, and set the
reference position. */
} else {
/* smf_tslice_ast only needs to get called once to set up framesets */
if( hdr->wcs == NULL ) {
smf_tslice_ast( data, goodidx, 1, fts_port, status);
}
/* Retrieve input SkyFrame */
skyin = astGetFrame( hdr->wcs, AST__CURRENT );
smf_calc_skyframe( skyin, system, hdr, alignsys, &junksky, skyref,
moving, status );
/* Store the sky reference position. If the target is moving,
ensure the returned SkyFrame represents offsets from the
reference position rather than absolute coords. */
astSetD( oskyframe, "SkyRef(1)", skyref[ 0 ] );
astSetD( oskyframe, "SkyRef(2)", skyref[ 1 ] );
if( *moving ) astSet( oskyframe, "SkyRefIs=Origin" );
/* Ensure the Epoch attribute in the map is set to the date of
the first data in the map, rather than the date in supplied
reference WCS. */
astSetD( oskyframe, "Epoch", astGetD( junksky, "Epoch" ) );
}
if ( *outframeset == NULL && oskyframe != NULL && (*status == SAI__OK)){
/* Now created a spatial Mapping. Use the supplied reference frameset
if supplied */
if (spacerefwcs) {
oskymap = astGetMapping( spacerefwcs, AST__BASE, AST__CURRENT );
} else {
/* Now populate a FitsChan with FITS-WCS headers describing
the required tan plane projection. The longitude and
latitude axis types are set to either (RA,Dec) or (AZ,EL)
to get the correct handedness. */
fitschan = astFitsChan ( NULL, NULL, " " );
smf_makefitschan( astGetC( oskyframe, "System"), &(par[0]),
&(par[2]), &(par[4]), par[6], fitschan, status );
astClear( fitschan, "Card" );
fs = astRead( fitschan );
/* Extract the output PIXEL->SKY Mapping. */
oskymap = astGetMapping( fs, AST__BASE, AST__CURRENT );
/* Tidy up */
fs = astAnnul( fs );
}
/* Create the output FrameSet */
*outframeset = astFrameSet( astFrame(2, "Domain=GRID"), " " );
/* Now add the SkyFrame to it */
astAddFrame( *outframeset, AST__BASE, oskymap, oskyframe );
/* Now add a POLANAL Frame if required (i.e. if the input time
series are POL-2 Q/U values). */
smf_addpolanal( *outframeset, hdr, status );
/* Invert the oskymap mapping */
astInvert( oskymap );
} /* End WCS FrameSet construction */
}
/* Get a copy of the output SkyFrame and ensure it represents
absolute coords rather than offset coords. */
abskyframe = astCopy( oskyframe );
astClear( abskyframe, "SkyRefIs" );
astClear( abskyframe, "AlignOffset" );
maxloop = (data->dims)[2];
if (fast) {
/* For scan map we scan through looking for largest telescope moves.
For dream/stare we just look at the start and end time slices to
account for sky rotation. */
if (hdr->obsmode != SMF__OBS_SCAN) {
textreme[0] = 0;
textreme[1] = (data->dims)[2] - 1;
maxloop = 2;
} else {
const char *tracksys;
double *ac1list, *ac2list, *bc1list, *bc2list, *p1, *p2, *p3, *p4;
double flbnd[4], fubnd[4];
JCMTState state;
/* If the output and tracking systems are different, get a
Mapping between them. */
tracksys = sc2ast_convert_system( (hdr->allState)[goodidx].tcs_tr_sys,
status );
if( strcmp( system, tracksys ) ) {
AstSkyFrame *tempsf = astCopy( abskyframe );
astSetC( tempsf, "System", tracksys );
AstFrameSet *tempfs = astConvert( tempsf, abskyframe, "" );
tmap = astGetMapping( tempfs, AST__BASE, AST__CURRENT );
fast_map = astSimplify( tmap );
tmap = astAnnul( tmap );
tempsf = astAnnul( tempsf );
tempfs = astAnnul( tempfs );
} else {
fast_map = NULL;
}
/* Copy all ac1/2 positions into two array, and transform them
from tracking to absolute output sky coords. */
ac1list = astMalloc( maxloop*sizeof( *ac1list ) );
ac2list = astMalloc( maxloop*sizeof( *ac2list ) );
if( *status == SAI__OK ) {
p1 = ac1list;
p2 = ac2list;
for( j = 0; j < maxloop; j++ ) {
state = (hdr->allState)[ j ];
*(p1++) = state.tcs_tr_ac1;
*(p2++) = state.tcs_tr_ac2;
}
if( fast_map ) astTran2( fast_map, maxloop, ac1list, ac2list, 1,
ac1list, ac2list );
}
/* If the target is moving, we need to adjust these ac1/2 values
to represent offsets from the base position. */
if( *moving ) {
/* Copy all bc1/2 positions into two arrays. */
bc1list = astMalloc( maxloop*sizeof( *bc1list ) );
bc2list = astMalloc( maxloop*sizeof( *bc2list ) );
if( *status == SAI__OK ) {
p1 = bc1list;
p2 = bc2list;
for( j = 0; j < maxloop; j++ ) {
state = (hdr->allState)[ j ];
*(p1++) = state.tcs_tr_bc1;
*(p2++) = state.tcs_tr_bc2;
}
/* Transform them from tracking to absolute output sky coords. */
if( fast_map ) astTran2( fast_map, maxloop, bc1list, bc2list,
1, bc1list, bc2list );
/* Replace each ac1/2 position with the offsets from the
corresponding base position. */
p1 = bc1list;
p2 = bc2list;
p3 = ac1list;
p4 = ac2list;
for( j = 0; j < maxloop; j++ ) {
smf_offsets( *(p1++), *(p2++), p3++, p4++, status );
}
}
/* We no longer need the base positions. */
bc1list = astFree( bc1list );
bc2list = astFree( bc2list );
}
/* Transform the ac1/2 position from output sky coords to
output pixel coords. */
astTran2( oskymap, maxloop, ac1list, ac2list, 1, ac1list, ac2list );
/* Find the bounding box containing these pixel coords and the
time slices at which the boresight touches each edge of this
box. */
flbnd[ 0 ] = VAL__MAXD;
flbnd[ 1 ] = VAL__MAXD;
fubnd[ 0 ] = VAL__MIND;
fubnd[ 1 ] = VAL__MIND;
for( j = 0; j < 4; j++ ) textreme[ j ] = (dim_t) VAL__BADI;
if( *status == SAI__OK ) {
p1 = ac1list;
p2 = ac2list;
for( j = 0; j < maxloop; j++,p1++,p2++ ) {
if( *p1 != VAL__BADD && *p2 != VAL__BADD ){
if ( *p1 < flbnd[0] ) { flbnd[0] = *p1; textreme[0] = j; }
if ( *p2 < flbnd[1] ) { flbnd[1] = *p2; textreme[1] = j; }
if ( *p1 > fubnd[0] ) { fubnd[0] = *p1; textreme[2] = j; }
if ( *p2 > fubnd[1] ) { fubnd[1] = *p2; textreme[3] = j; }
}
}
}
maxloop = 4;
msgSetd("X1", textreme[0]);
msgSetd("X2", textreme[1]);
msgSetd("X3", textreme[2]);
msgSetd("X4", textreme[3]);
msgOutif( MSG__DEBUG, " ",
"Extrema time slices are ^X1, ^X2, ^X3 and ^X4",
status);
ac1list = astFree( ac1list );
ac2list = astFree( ac2list );
}
}
/* Get the astrometry for all the relevant time slices in this data file */
for( j=0; j<maxloop; j++ ) {
dim_t ts; /* Actual time slice to use */
/* if we are doing the fast loop, we need to read the time slice
index from textreme. Else we just use the index */
if (fast) {
/* get the index but make sure it is good */
ts = textreme[j];
if (ts == (dim_t)VAL__BADI) continue;
} else {
ts = j;
}
/* Calculate the bolo to map-pixel transformation for this tslice */
bolo2map = smf_rebin_totmap( data, ts, abskyframe, oskymap,
*moving, fts_port, status );
if ( *status == SAI__OK ) {
/* skip if we did not get a mapping this time round */
if (!bolo2map) continue;
/* Check corner pixels in the array for their projected extent
on the sky to set the pixel bounds */
astTran2( bolo2map, 4, x_array_corners, y_array_corners, 1,
x_map, y_map );
/* Update min/max for this time slice */
for( k=0; k<4; k++ ) {
if( x_map[k] != AST__BAD && y_map[k] != AST__BAD ) {
if( x_map[k] < dlbnd[0] ) dlbnd[0] = x_map[k];
if( y_map[k] < dlbnd[1] ) dlbnd[1] = y_map[k];
if( x_map[k] > dubnd[0] ) dubnd[0] = x_map[k];
if( y_map[k] > dubnd[1] ) dubnd[1] = y_map[k];
if( x_map[k] < box->lbnd[0] ) box->lbnd[0] = x_map[k];
if( y_map[k] < box->lbnd[1] ) box->lbnd[1] = y_map[k];
if( x_map[k] > box->ubnd[0] ) box->ubnd[0] = x_map[k];
if( y_map[k] > box->ubnd[1] ) box->ubnd[1] = y_map[k];
} else if( *status == SAI__OK ) {
*status = SAI__ERROR;
errRep( FUNC_NAME, "Extreme positions are bad.", status );
break;
}
}
}
/* Explicitly annul these mappings each time slice for reduced
memory usage */
if (bolo2map) bolo2map = astAnnul( bolo2map );
if (fs) fs = astAnnul( fs );
/* Break out of loop over time slices if bad status */
if (*status != SAI__OK) goto CLEANUP;
}
/* Annul any remaining Ast objects before moving on to the next file */
if (fs) fs = astAnnul( fs );
if (bolo2map) bolo2map = astAnnul( bolo2map );
}
/* Close the data file */
smf_close_file( NULL, &data, status);
/* Break out of loop over data files if bad status */
if (*status != SAI__OK) goto CLEANUP;
}
/* make sure we got values - should not be possible with good status */
if (dlbnd[0] == VAL__MAXD || dlbnd[1] == VAL__MAXD) {
if (*status == SAI__OK) {
*status = SAI__ERROR;
errRep( " ", "Unable to find any valid map bounds", status );
}
}
if (nbadt > 0) {
msgOutf( "", " Processed %zu time slices to calculate bounds,"
" of which %zu had bad telescope data and were skipped",
status, (size_t)(ngoodt+nbadt), (size_t)nbadt );
}
/* If spatial reference wcs was supplied, store par values that result in
no change to the pixel origin. */
if( spacerefwcs ){
par[ 0 ] = 0.5;
par[ 1 ] = 0.5;
}
/* Need to re-align with the interim GRID coordinates */
lbnd_out[0] = ceil( dlbnd[0] - par[0] + 0.5 );
ubnd_out[0] = ceil( dubnd[0] - par[0] + 0.5 );
lbnd_out[1] = ceil( dlbnd[1] - par[1] + 0.5 );
ubnd_out[1] = ceil( dubnd[1] - par[1] + 0.5 );
/* Do the same with the individual input file bounding boxes */
box = *boxes;
for (i = 1; i <= size; i++, box++) {
box->lbnd[0] = ceil( box->lbnd[0] - par[0] + 0.5);
box->ubnd[0] = ceil( box->ubnd[0] - par[0] + 0.5);
box->lbnd[1] = ceil( box->lbnd[1] - par[1] + 0.5);
box->ubnd[1] = ceil( box->ubnd[1] - par[1] + 0.5);
}
/* Apply a ShiftMap to the output FrameSet to re-align the GRID
coordinates */
shift[0] = 2.0 - par[0] - lbnd_out[0];
shift[1] = 2.0 - par[1] - lbnd_out[1];
astRemapFrame( *outframeset, AST__BASE, astShiftMap( 2, shift, " " ) );
/* Set the dynamic defaults for lbnd/ubnd */
lbnd0[ 0 ] = lbnd_out[ 0 ];
lbnd0[ 1 ] = lbnd_out[ 1 ];
parDef1i( "LBND", 2, lbnd0, status );
ubnd0[ 0 ] = ubnd_out[ 0 ];
ubnd0[ 1 ] = ubnd_out[ 1 ];
parDef1i( "UBND", 2, ubnd0, status );
parGet1i( "LBND", 2, lbnd_out, &actval, status );
if( actval == 1 ) lbnd_out[ 1 ] = lbnd_out[ 0 ];
parGet1i( "UBND", 2, ubnd_out, &actval, status );
if( actval == 1 ) ubnd_out[ 1 ] = ubnd_out[ 0 ];
/* Ensure the bounds are the right way round. */
if( lbnd_out[ 0 ] > ubnd_out[ 0 ] ) {
int itmp = lbnd_out[ 0 ];
lbnd_out[ 0 ] = ubnd_out[ 0 ];
ubnd_out[ 0 ] = itmp;
}
if( lbnd_out[ 1 ] > ubnd_out[ 1 ] ) {
int itmp = lbnd_out[ 1 ];
lbnd_out[ 1 ] = ubnd_out[ 1 ];
ubnd_out[ 1 ] = itmp;
}
/* If borders of bad pixels are being trimmed from the output image,
then do not allow the user-specified bounds to extend outside the
default bounding box (since we know that the default bounding box
encloses all available data). */
parGet0l( "TRIM", &trim, status );
if( trim ) {
if( lbnd_out[ 0 ] < lbnd0[ 0 ] ) lbnd_out[ 0 ] = lbnd0[ 0 ];
if( lbnd_out[ 1 ] < lbnd0[ 1 ] ) lbnd_out[ 1 ] = lbnd0[ 1 ];
if( ubnd_out[ 0 ] > ubnd0[ 0 ] ) ubnd_out[ 0 ] = ubnd0[ 0 ];
if( ubnd_out[ 1 ] > ubnd0[ 1 ] ) ubnd_out[ 1 ] = ubnd0[ 1 ];
}
/* Modify the returned FrameSet to take account of the new pixel origin. */
shift[ 0 ] = lbnd0[ 0 ] - lbnd_out[ 0 ];
shift[ 1 ] = lbnd0[ 1 ] - lbnd_out[ 1 ];
if( shift[ 0 ] != 0.0 || shift[ 1 ] != 0.0 ) {
astRemapFrame( *outframeset, AST__BASE, astShiftMap( 2, shift, " " ) );
}
/* Report the pixel bounds of the cube. */
if( *status == SAI__OK ) {
msgOutif( MSG__NORM, " ", " ", status );
msgSeti( "XL", lbnd_out[ 0 ] );
msgSeti( "YL", lbnd_out[ 1 ] );
msgSeti( "XU", ubnd_out[ 0 ] );
msgSeti( "YU", ubnd_out[ 1 ] );
msgOutif( MSG__NORM, " ", " Output map pixel bounds: ( ^XL:^XU, ^YL:^YU )",
status );
if( ( ubnd_out[ 0 ] - lbnd_out[ 0 ] + 1 ) > MAX_DIM ||
( ubnd_out[ 1 ] - lbnd_out[ 1 ] + 1 ) > MAX_DIM ) {
*status = SAI__ERROR;
errRep( "", FUNC_NAME ": The map is too big. Check your list of input "
"data files does not include widely separated observations.",
status );
}
}
/* If no error has occurred, export the returned FrameSet pointer from the
current AST context so that it will not be annulled when the AST
context is ended. Otherwise, ensure a null pointer is returned. */
if( *status == SAI__OK ) {
astExport( *outframeset );
} else {
*outframeset = astAnnul( *outframeset );
}
msgOutiff( SMF__TIMER_MSG, "",
"Took %.3f s to calculate map bounds",
status, smf_timerupdate( &tv1, &tv2, status ) );
/* Clean Up */
CLEANUP:
if (*status != SAI__OK) {
errRep(FUNC_NAME, "Unable to determine map bounds", status);
}
if (oskymap) oskymap = astAnnul( oskymap );
if (bolo2map) bolo2map = astAnnul( bolo2map );
if (fitschan) fitschan = astAnnul( fitschan );
if( data != NULL )
smf_close_file( NULL, &data, status );
refsys = astFree( refsys );
astEnd;
}
/* ============== */
int main( int argc, char *argv[] ) {
/*
*+
* Name:
* ast_test
* Purpose:
* Test installation of the AST library.
* Type:
* C program.
* Description:
* This program performs a simple test (without using graphics) of
* the AST library, to check that it is correctly installed. It is
* not an exhaustive test of the system.
* Arguments:
* None.
* Copyright:
* Copyright (C) 1997-2006 Council for the Central Laboratory of the
* Research Councils
* Licence:
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence as
* published by the Free Software Foundation; either version 2 of
* the Licence, or (at your option) any later version.
*
* This program is distributed in the hope that it will be
* useful,but WITHOUT ANY WARRANTY; without even the implied
* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public Licence for more details.
*
* You should have received a copy of the GNU General Public Licence
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street,Fifth Floor, Boston, MA
* 02110-1301, USA
* Authors:
* RFWS: R.F. Warren-Smith (Starlink)
* History:
* 19-NOV-1997 (RFWS);
* Original version.
*-
*/
/* Local Constants: */
#define NCOORD 10 /* Number of coordinates to transform */
/* Local Variables: */
AstFrameSet *cvt; /* Pointer to conversion FrameSet */
AstSkyFrame *sky1; /* Pointer to first SkyFrame */
AstSkyFrame *sky2; /* Pointer to second SkyFrame */
double xin[ NCOORD ]; /* Input coordinate array */
double xout[ NCOORD ]; /* Output coordinate array */
double yin[ NCOORD ]; /* Input coordinate array */
double yout[ NCOORD ]; /* Output coordinate array */
int i; /* Loop counter for coordinates */
/* Begin an AST context. */
astBegin;
/* Create two SkyFrames. */
sky1 = astSkyFrame( "system = FK4_NO_E, equinox = B1920, epoch = B1958" );
sky2 = astSkyFrame( "system = ecliptic, equinox = J2001" );
/* Create a FrameSet describing the conversion between them. */
cvt = astConvert( sky1, sky2, "" );
/* If successful, set up some input coordinates. */
if ( cvt != AST__NULL ) {
for ( i = 0; i < NCOORD; i++ ) {
xin[ i ] = 0.1 * (double) i;
yin[ i ] = 0.2 * (double) i;
}
/* Display the FrameSet. */
astShow( cvt );
printf( "\n");
/* Activate reporting of coordinate transformations. */
astSet( cvt, "Report = 1" );
/* Perform the forward transformation. */
astTran2( cvt, 10, xin, yin, 1, xout, yout );
printf( "\n");
/* Perform the inverse transformation. */
astTran2( cvt, 10, xout, yout, 0, xin, yin );
}
/* End the AST context. */
astEnd;
/* Return an error status. */
return astOK ? 0 : 1;
/* Undefine local macros. */
#undef NCOORD
}
void smf_rebincube_nn( ThrWorkForce *wf, smfData *data, int first, int last,
int *ptime, dim_t nchan, dim_t ndet, dim_t nslice,
dim_t nxy, dim_t nout, dim_t dim[3],
int badmask, int is2d, AstMapping *ssmap,
AstSkyFrame *abskyfrm, AstMapping *oskymap,
Grp *detgrp, int moving, int usewgt, int genvar,
double tfac, double fcon, float *data_array,
float *var_array, double *wgt_array,
float *texp_array, float *teff_array, int *nused,
int *nreject, int *naccept, int *good_tsys,
int *status ){
/* Local Variables */
AstMapping *totmap = NULL; /* WCS->GRID Mapping from input WCS FrameSet */
const char *name = NULL; /* Pointer to current detector name */
const double *tsys = NULL; /* Pointer to Tsys value for first detector */
dim_t gxout; /* Output X grid index */
dim_t gyout; /* Output Y grid index */
dim_t ichan; /* Input channel index */
dim_t idet; /* detector index */
dim_t itime; /* Index of current time slice */
dim_t nchanout; /* No of spectral channels in the output */
dim_t timeslice_size; /* No of detector values in one time slice */
double *detxin = NULL; /* Work space for input X grid coords */
double *detxout = NULL; /* Work space for output X grid coords */
double *detyin = NULL; /* Work space for input Y grid coords */
double *detyout = NULL; /* Work space for output Y grid coords */
double invar; /* Input variance */
double tcon; /* Variance factor for whole time slice */
double wgt; /* Weight for input value */
float *ddata = NULL; /* Pointer to start of input detector data */
float *tdata = NULL; /* Pointer to start of input time slice data */
float *work = NULL; /* Pointer to start of work array */
float rtsys; /* Tsys value */
float teff; /* Effective integration time */
float texp; /* Total time ( = ton + toff ) */
int *nexttime; /* Pointer to next time slice index to use */
int *specpop = NULL; /* Input channels per output channel */
int *spectab = NULL; /* I/p->o/p channel number conversion table */
int first_ts; /* Is this the first time slice? */
int found; /* Was current detector name found in detgrp? */
int ignore; /* Ignore this time slice? */
int init_detector_data; /* Should detector_data be initialised? */
int iv0; /* Offset for pixel in 1st o/p spectral channel */
int jdet; /* Detector index */
int naccept_old; /* Previous number of accepted spectra */
int ochan; /* Output channel index */
int use_threads; /* Use multiple threads? */
smfHead *hdr = NULL; /* Pointer to data header for this time slice */
static smfRebincubeNNArgs1 *common_data = NULL; /* Holds data common to all detectors */
static smfRebincubeNNArgs2 *detector_data = NULL; /* Holds data for each detector */
static int *pop_array = NULL;/* I/p spectra pasted into each output spectrum */
static dim_t ndet_max = 0; /* Max number of detectors */
/* Check the inherited status. */
if( *status != SAI__OK ) return;
/* Store a pointer to the input NDFs smfHead structure. */
hdr = data->hdr;
/* Store the number of pixels in one time slice */
timeslice_size = ndet*nchan;
/* Use this mapping to get the zero-based output channel number corresponding
to each input channel number. */
smf_rebincube_spectab( nchan, dim[ 2 ], ssmap, &spectab, status );
if( !spectab ) goto L999;
/* The 2D weighting scheme assumes that each output channel receives
contributions from one and only one input channel in each input file.
Create an array with an element for each output channel, holding the
number of input channels that contribute to the output channel. */
nchanout = dim[ 2 ];
if( is2d ) {
specpop = astMalloc( nchanout*sizeof( int ) );
memset( specpop, 0, nchanout*sizeof( int ) );
for( ichan = 0; ichan < nchan; ichan++ ) {
ochan = spectab[ ichan ];
if( ochan != -1 ) specpop[ ochan ]++;
}
}
/* If this is the first pass through this file, initialise the arrays. */
if( first ){
smf_rebincube_init( is2d, nxy, nout, genvar, data_array, var_array,
wgt_array, texp_array, teff_array, nused, status );
/* Allocate an extra work array and initialise it to zero. This holds the
total number of input spectra pasted into each output spectrum. It is
not needed by the AST-based function and so has not been put into
smf_rebincube_init. */
if( is2d ) {
pop_array = astMalloc( nxy*sizeof( int ) );
memset( pop_array, 0, nxy*sizeof( int ) );
}
}
/* Allocate work arrays to hold the input and output grid coords for each
detector. */
detxin = astMalloc( ndet*sizeof( double ) );
detyin = astMalloc( ndet*sizeof( double ) );
detxout = astMalloc( ndet*sizeof( double ) );
detyout = astMalloc( ndet*sizeof( double ) );
/* Initialise a string to point to the name of the first detector for which
data is available */
name = hdr->detname;
/* Fill the input arrays with the grid coords of each detector. */
for( idet = 0; idet < ndet; idet++ ) {
detxin[ idet ] = (double) idet + 1.0;
detyin[ idet ] = 1.0;
/* If a group of detectors to be used was supplied, search the group for
the name of the current detector. If not found, set the GRID coord
bad. */
if( detgrp ) {
found = grpIndex( name, detgrp, 1, status );
if( !found ) {
detxin[ idet ] = AST__BAD;
detyin[ idet ] = AST__BAD;
}
}
/* Move on to the next available detector name. */
name += strlen( name ) + 1;
}
/* Initialise a pointer to the ntex time slice index to be used. */
nexttime = ptime;
/* Count the number of time slices to be processed. */
if( ptime ) {
itime = 0;
while( ptime[ itime ] != VAL__MAXI ) itime++;
if( data->file ) {
msgOutiff( MSG__DEBUG, " ", "smf_rebincube_nn: Selecting %d time "
"slices from data file '%s'.", status, (int) itime,
data->file->name );
}
} else {
itime = nslice;
if( data->file ) {
msgOutiff( MSG__DEBUG, " ", "smf_rebincube_nn: Using all %d time "
"slices from data file '%s'.", status, (int) itime,
data->file->name );
}
}
/* Initialise the progress meter. */
smf_reportprogress( itime, status );
/* Loop round all time slices in the input NDF. */
use_threads = 0;
first_ts = 1;
for( itime = 0; itime < nslice && *status == SAI__OK; itime++ ) {
/* If this time slice is not being pasted into the output cube, pass on. */
if( nexttime ){
if( *nexttime != (int) itime ) continue;
nexttime++;
}
/* Store a pointer to the first input data value in this time slice. */
tdata = ( (float *) (data->pntr)[ 0 ] ) + itime*timeslice_size;
/* Begin an AST context. Having this context within the time slice loop
helps keep the number of AST objects in use to a minimum. */
astBegin;
/* Get a Mapping from the spatial GRID axes in the input the spatial
GRID axes in the output for the current time slice. Note this has
to be done first since it stores details of the current time slice
in the "smfHead" structure inside "data", and this is needed by
subsequent functions. */
totmap = smf_rebin_totmap( data, itime, abskyfrm, oskymap, moving,
status );
if( !totmap ) {
if( data->file ) {
msgOutiff( MSG__DEBUG, " ", "smf_rebincube_nn: Cannot get "
"Mapping for slice %d from data file '%s'.", status,
(int) itime, data->file->name );
}
astEnd;
break;
}
/* Get the effective exposure time, the total exposure time, and the
Tsys->Variance onversion factor for this time slice. Also get a
pointer to the start of the Tsys array. */
tsys = smf_rebincube_tcon( hdr, itime, fcon, &texp, &teff, &tcon,
status );
/* Use this Mapping to get the output spatial grid coords for each input
detector. */
astTran2( totmap, ndet, detxin, detyin, 1, detxout, detyout );
/* If this is the first time slice from the current input file to be pasted
into the output, see if any of the spectra will end up being pasted on
top of each other in the output. If not we can use a separate thread to
paste each spectrum. Otherwise, we cannot use multiple threads since they
may end up trying to write to the same output pixel at the same time. */
if( first_ts ) {
first_ts = 0;
use_threads = wf ? 1 : 0;
for( idet = 0; idet < ndet - 1 && use_threads; idet++ ) {
if( detxout[ idet ] != AST__BAD && detyout[ idet ] != AST__BAD ){
gxout = floor( detxout[ idet ] + 0.5 );
gyout = floor( detyout[ idet ] + 0.5 );
if( gxout >= 1 && gxout <= dim[ 0 ] &&
gyout >= 1 && gyout <= dim[ 1 ] ) {
for( jdet = idet + 1; idet < ndet; idet++ ) {
if( detxout[ jdet ] != AST__BAD &&
detyout[ jdet ] != AST__BAD ){
if( floor( detxout[ jdet ] + 0.5 ) == gxout &&
floor( detyout[ jdet ] + 0.5 ) == gyout ) {
use_threads = 0;
break;
}
}
}
}
}
}
/* If we will be using mutiple threads, do some preparation. */
if( use_threads ) {
if( data->file ) {
msgOutiff( MSG__DEBUG, " ", "smf_rebincube_nn: Using multiple "
"threads to process data file '%s'.", status,
data->file->name );
}
/* Ensure we have a structure holding information which is common to all
detectors and time slices. */
common_data = astGrow( common_data, sizeof( smfRebincubeNNArgs1 ), 1 );
if( astOK ) {
common_data->badmask = badmask;
common_data->nchan = nchan;
common_data->nchanout = nchanout;
common_data->spectab = spectab;
common_data->specpop = specpop;
common_data->nxy = nxy;
common_data->genvar = genvar;
common_data->data_array = data_array;
common_data->var_array = var_array;
common_data->wgt_array = wgt_array;
common_data->pop_array = pop_array;
common_data->nout = nout;
common_data->is2d = is2d;
}
/* Ensure we have a structure for each detector to hold the detector-specific
data, plus a pointer to the common data. */
init_detector_data = ( detector_data == NULL );
if( init_detector_data ) ndet_max = 0;
detector_data = astGrow( detector_data, sizeof( smfRebincubeNNArgs2 ),
ndet ) ;
/* Initialise pointers stored within any new elements added to the
"detector_data" array. */
if( ndet > ndet_max && astOK ) {
for( idet = ndet_max; idet < ndet; idet++ ) {
detector_data[ idet ].common = NULL;
detector_data[ idet ].work = NULL;
detector_data[ idet ].ddata = NULL;
}
ndet_max = ndet;
}
/* Allocate work space for each detector and store the common data
pointer. */
if( astOK ) {
for( idet = 0; idet < ndet; idet++ ) {
detector_data[ idet ].common = common_data;
detector_data[ idet ].work = astGrow( detector_data[ idet ].work,
sizeof( float ), nchanout );
}
}
/* If we are using a single threads, do some alternative preparation. */
} else {
if( data->file ) {
msgOutiff( MSG__DEBUG, " ", "smf_rebincube_nn: Using a single "
"thread to process data file '%s'.", status,
data->file->name );
}
/* We need an extra work array for 2D weighting that can hold a single
output spectrum. This is used as a staging post for each input
spectrum prior to pasting it into the output cube. */
work = astMalloc( nchanout*sizeof( float ) );
}
}
/* Loop round each detector, pasting its spectral values into the output
cube. */
for( idet = 0; idet < ndet; idet++ ) {
/* If multi-threaded, initialise a bad value for the detector's weight
to indicate that it is not being used. */
if( use_threads ) detector_data[ idet ].wgt = VAL__BADD;
/* See if any good tsys values are present. */
rtsys = tsys ? (float) tsys[ idet ] : VAL__BADR;
if( rtsys <= 0.0 ) rtsys = VAL__BADR;
if( rtsys != VAL__BADR ) *good_tsys = 1;
/* Check the detector has a valid position in output grid coords */
if( detxout[ idet ] != AST__BAD && detyout[ idet ] != AST__BAD ){
/* Find the closest output pixel and check it is within the bounds of the
output cube. */
gxout = floor( detxout[ idet ] + 0.5 );
gyout = floor( detyout[ idet ] + 0.5 );
if( gxout >= 1 && gxout <= dim[ 0 ] &&
gyout >= 1 && gyout <= dim[ 1 ] ) {
/* Get the offset of the output array element that corresponds to this
pixel in the first spectral channel. */
iv0 = ( gyout - 1 )*dim[ 0 ] + ( gxout - 1 );
/* If required calculate the variance associated with this detector, based on
the input Tsys values. */
invar = VAL__BADR;
if( usewgt || genvar == 2 ) {
if( rtsys != VAL__BADR ) {
if( tcon != VAL__BADD ) invar = tcon*rtsys*rtsys;
}
}
/* Calculate the weight for this detector. If we need the input variance,
either to weight the input or to calculate output variances, but the
input variance is not available, then ignore this detector. */
ignore = 0;
if( usewgt ) {
if( invar > 0.0 && invar != VAL__BADR ) {
wgt = 1.0/invar;
} else {
ignore = 1;
}
} else if( genvar == 2 ) {
ignore = ( invar <= 0.0 || invar == VAL__BADR );
wgt = 1.0;
} else {
wgt = 1.0;
}
/* If we are not ignoring this input spectrum, get a pointer to the start
of the input spectrum data and paste it into the output cube using
either the 2D or 3D algorithm. */
if( !ignore ) {
ddata = tdata + idet*nchan;
/* First deal with cases where we are using a single thread (the current
thread). */
if( !use_threads ) {
naccept_old = *naccept;
if( is2d ) {
smf_rebincube_paste2d( badmask, nchan, nchanout, spectab,
specpop, iv0, nxy, wgt, genvar,
invar, ddata, data_array,
var_array, wgt_array, pop_array,
nused, nreject, naccept, work,
status );
} else {
smf_rebincube_paste3d( nchan, nout, spectab, iv0, nxy,
wgt, genvar, invar, ddata,
data_array, var_array,
wgt_array, nused, status );
(*naccept)++;
}
/* Now we update the total and effective exposure time arrays for the
output spectrum that receives this input spectrum. Scale the exposure
times of this time slice in order to reduce its influence on the
output expsoure times if it does not have much spectral overlap with
the output cube. Only update the exposure time arrays if the spectrum
was used (as shown by an increase in the number of accepted spectra). */
if( texp != VAL__BADR && *naccept > naccept_old ) {
texp_array[ iv0 ] += texp*tfac;
teff_array[ iv0 ] += teff*tfac;
}
/* Now deal with cases where we are using several threads. */
} else {
/* Set up the detector specific data. */
detector_data[ idet ].iv0 = iv0;
detector_data[ idet ].wgt = wgt;
detector_data[ idet ].invar = invar;
detector_data[ idet ].ddata = ddata;
detector_data[ idet ].nused = 0;
detector_data[ idet ].nreject = 0;
detector_data[ idet ].naccept = 0;
/* Add a job to the workforce's job list. This job calls smf_rebincube_paste2d
or smf_rebincube_paste3d to paste the detector input spectrum into the
output cube. */
thrAddJob( wf, 0, detector_data + idet,
smf_rebincube_paste_thread, 0, NULL, status );
}
} else if( data->file ) {
msgOutiff( MSG__DEBUG, " ", "smf_rebincube_nn: Detector %d "
"is being ignored when processing data file '%s'.",
status, idet, data->file->name );
}
} else if( data->file ) {
msgOutiff( MSG__DEBUG, " ", "smf_rebincube_nn: Detector %d "
"fell outside the output cube when processing "
"data file '%s'.", status, idet, data->file->name );
}
} else if( data->file ) {
msgOutiff( MSG__DEBUG, " ", "smf_rebincube_nn: Detector %d has "
"an unknown position in the output cube when processing "
"data file '%s'.", status, idet, data->file->name );
}
}
/* If using multiple threads, wait until all spectra for this time slice
have been pasted into the output cube. Then transfer the output values
from the detector data structures to the returned variables. */
if( use_threads ) {
thrWait( wf, status );
for( idet = 0; idet < ndet; idet++ ) {
if( detector_data[ idet ].wgt != VAL__BADD ) {
(*nused) += detector_data[ idet ].nused;
(*nreject) += detector_data[ idet ].nreject;
(*naccept) += detector_data[ idet ].naccept;
if( texp != VAL__BADR && detector_data[ idet ].naccept > 0 ) {
texp_array[ detector_data[ idet ].iv0 ] += texp*tfac;
teff_array[ detector_data[ idet ].iv0 ] += teff*tfac;
}
}
}
}
/* Update the progress meter. */
smf_reportprogress( 0, status );
/* End the AST context. */
astEnd;
}
/* If this is the final pass through this function, normalise the returned
data and variance values, and release any static resources allocated
within this function. */
if( last ) {
if( is2d ) {
smf_rebincube_norm2d( nout, nxy, genvar, data_array,
var_array, wgt_array, pop_array, status );
} else {
smf_rebincube_norm3d( nout, genvar, *nused, data_array,
var_array, wgt_array, status );
}
pop_array = astFree( pop_array );
if( use_threads ) {
common_data = astFree( common_data );
for( idet = 0; idet < ndet_max; idet++ ) {
detector_data[ idet ].work = astFree( detector_data[ idet ].work );
}
detector_data = astFree( detector_data );
}
}
/* Free non-static resources. */
L999:;
work = astFree( work );
spectab = astFree( spectab );
specpop = astFree( specpop );
detxin = astFree( detxin );
detyin = astFree( detyin );
detxout = astFree( detxout );
detyout = astFree( detyout );
}
double smf_calc_mappa( smfHead *hdr, const char *system, AstFrame *sf,
int *status ){
/* Local Variables */
AstFrameSet *fs = NULL; /* FrameSet joining tracking and requested systems */
AstFrame *sf2 = NULL; /* Frame in requested system */
const char *oldsys = NULL; /* Original System value for supplied Frame */
const char *trsys = NULL; /* AST tracking system */
const char *usesys = NULL; /* AST system for output cube */
double map_pa; /* MAP_PA in tracking system (degs) */
double p1[ 2 ]; /* Base pointing position */
double p2[ 2 ]; /* A point on the map vertical axis */
double p3[ 2 ]; /* A point north of the base pointing position */
double result; /* The returned angle */
double xin[ 2 ]; /* Longitude values in tracking system */
double xout[ 2 ]; /* Longitude values in requested system */
double yin[ 2 ]; /* Latitude values in tracking system */
double yout[ 2 ]; /* Latitude values in requested system */
/* Check inherited status */
if (*status != SAI__OK) return 0.0;
/* Determine the tracking system, and choose the celestial coordinate system
for the output cube. */
trsys = sc2ast_convert_system( hdr->state->tcs_tr_sys, status );
if( !strcmp( system, "TRACKING" ) ) {
usesys = trsys;
} else {
usesys = system;
}
/* Save the System value of the supplied Frame, and set it to the
tracking system. */
oldsys = astGetC( sf, "System" );
astSetC( sf, "System", trsys );
/* Get the base pointing position in the tracking system. */
p1[ 0 ] = hdr->state->tcs_tr_bc1;
p1[ 1 ] = hdr->state->tcs_az_bc2;
/* Move along the map "vertical" axis (as specified by the MAP_PA FITS
header) for 1 arc-minute from the base pointing position. Set up a
suitable default first in case the MAP_PA value is undefined. */
map_pa = 0.0;
smf_getfitsd( hdr, "MAP_PA", &map_pa, status );
(void) astOffset2( sf, p1, map_pa*AST__DD2R, AST__DD2R/60.0, p2 );
/* Take a copy of the Frame and set its System value to the requested
system. */
sf2 = astCopy( sf );
astSetC( sf2, "System", usesys );
/* Find a Mapping from the tracking system to the requested system. */
fs = astConvert( sf, sf2, "" );
/* Use this Mapping to transform the above two positions from tracking to
the requested system. */
xin[ 0 ] = p1[ 0 ];
yin[ 0 ] = p1[ 1 ];
xin[ 1 ] = p2[ 0 ];
yin[ 1 ] = p2[ 1 ];
astTran2( fs, 2, xin, yin, 1, xout, yout );
p1[ 0 ] = xout[ 0 ];
p1[ 1 ] = yout[ 0 ];
p2[ 0 ] = xout[ 1 ];
p2[ 1 ] = yout[ 1 ];
/* Create a 3rd position which 1 arc-minute to the north of the base
pointing position in the requested system. */
p3[ 0 ] = p1[ 0 ];
p3[ 1 ] = p1[ 1 ] + AST__DD2R/60.0;
/* Find the angle subtended at p1 by p2 and p3. */
result = astAngle( sf2, p3, p1, p2 );
/* Re-instate the original System value in the supplied Frame. */
astSetC( sf, "System", oldsys );
/* Free resources. */
fs = astAnnul( fs );
sf2 = astAnnul( sf2 );
/* Return the required angle. */
return result;
}
void smf_coords_lut( smfData *data, int tstep, dim_t itime_lo,
dim_t itime_hi, AstSkyFrame *abskyfrm,
AstMapping *oskymap, int moving, int olbnd[ 2 ],
int oubnd[ 2 ], fts2Port fts_port, int *lut,
double *angle,
double *lon, double *lat, int *status ) {
/* Local Variables */
AstCmpMap *bsmap = NULL; /* Tracking -> output grid Mapping */
AstFrame *trfrm = NULL; /* Tracking Frame */
AstFrameSet *fs = NULL; /* Tracking -> output sky FrameSet */
AstMapping *fullmap = NULL; /* Full Mapping from bolo GRID to output map GRID */
AstMapping *offmap = NULL; /* Mapping from absolute to offset sky coords */
AstMapping *tr2skyabs = NULL;/* Tracking -> output sky Mapping */
AstSkyFrame *offsky = NULL; /* Offset sky frame */
JCMTState *state; /* Pointer to telescope info for time slice */
dim_t ibolo; /* Vector index of bolometer */
dim_t idimx; /* Bolometers per row */
dim_t idimy; /* Bolometers per column */
dim_t ilut; /* Index of LUT element */
dim_t itime0; /* Time slice index at next full calculation */
dim_t itime; /* Time slice index */
dim_t nbolo; /* Total number of bolometers */
double *outmapcoord; /* Array holding output map GRID coords */
double *px; /* Pointer to next output map X GRID coord */
double *py; /* Pointer to next output map Y GRID coord */
double *pgx; /* Pointer to next X output grid coords */
double *pgy; /* Pointer to next Y output grid coords */
double *wgx = NULL; /* Work space to hold X output grid coords */
double *wgy = NULL; /* Work space to hold Y output grid coords */
double bsx0; /* Boresight output map GRID X at previous full calc */
double bsx; /* Boresight output map GRID X at current time slice */
double bsxlast; /* Boresight output map GRID X at previous time slice*/
double bsy0; /* Boresight output map GRID Y at previous full calc */
double bsy; /* Boresight output map GRID Y at current time slice */
double bsylast; /* Boresight output map GRID Y at previous time slice*/
double dx; /* Offset in GRID X from previous full calc */
double dxlast; /* Offset in GRID X from previous time slice */
double dy; /* Offset in GRID Y from previous full calc */
double dylast; /* Offset in GRID Y from previous time slice */
double shift[ 2 ]; /* Shift from PIXEL to GRID in output map */
double x; /* Output GRID X at current bolo in current row */
double xin[ 2 ]; /* Input X values */
double xout[ 2 ]; /* Output X values */
double y; /* Output GRID Y at current bolo in current row */
double yin[ 2 ]; /* Input Y values */
double yout[ 2 ]; /* Output Y values */
int lbnd_in[ 2 ]; /* Lower bounds of input array */
int np; /* Number of positions to transform */
int odimx; /* Output map X dimension in pixels */
int odimy; /* Output map Y dimension in pixels */
int ox; /* Output X GRID index (-1) containing current bolo */
int oy; /* Output Y GRID index (-1) containing current bolo */
int ubnd_in[ 2 ]; /* Upper bounds of input array */
/* Check the inherited status. */
if( *status != SAI__OK ) return;
/* Begin an AST context. */
astBegin;
/* Get the dimensions of the output map. */
odimx = oubnd[ 0 ] - olbnd[ 0 ] + 1;
odimy = oubnd[ 1 ] - olbnd[ 1 ] + 1;
/* Get the dimensions of the bolometer array. */
idimx = (data->dims)[ 0 ];
idimy = (data->dims)[ 1 ];
/* Store integer bounds within the input bolometer GRID system. */
lbnd_in[ 0 ] = 1;
lbnd_in[ 1 ] = 1;
ubnd_in[ 0 ] = idimx;
ubnd_in[ 1 ] = idimy;
/* Determine the number of bolometers. */
nbolo = idimx*idimy;
/* Initialise the index of the next LUT element to write. */
ilut = 0;
/* Ensure tstep is at least one. */
if( tstep < 1 ) tstep = 1;
/* Get the time slice index at which to do the next full calculation. */
itime0 = itime_lo;
/* We only need the following AST objects if we will be approximating
some caclulations. */
if( tstep > 1 ) {
/* We need to find the first good TCS index in order to get the
tracking system (Which for SCUBA-2 won't be changing in the sequence) */
itime0 = VAL__BADI;
for (itime = itime_lo; itime <= itime_hi; itime++) {
JCMTState * slice = &((data->hdr->allState)[itime]);
if (!(slice->jos_drcontrol >= 0 && slice->jos_drcontrol & DRCNTRL__POSITION)) {
itime0 = itime;
break;
}
}
if ((int)itime0 != VAL__BADI) {
/* We need a Frame describing absolute tracking system coords. Take a
copy of the supplied skyframe (to inherit obslat, obslon, epoch,
etc), and then set its system to the tracking system. */
trfrm = astCopy( abskyfrm );
astSetC( trfrm, "System",
sc2ast_convert_system( (data->hdr->allState)[itime0].tcs_tr_sys,
status ) );
/* Get the Mapping from the tracking system to the output (absolute, since
abskyfrm is absolute) sky system. */
fs = astConvert( trfrm, abskyfrm, " " );
if( !fs && *status == SAI__OK ) {
*status = SAI__ERROR;
errRep( " ", "smf_coords_lut: Failed to convert from "
"tracking system to output WCS system.", status );
}
tr2skyabs = astSimplify( astGetMapping( fs, AST__BASE, AST__CURRENT ) );
/* For moving targets, we also need a Frame describing offset sky
coordinates in the output map, in which the reference point is the
current telescope base position. This will involve changing the
SkyRef attribute of the Frame for every time slice, so take a
copy of the supplied SkyFrame to avoid changing it. */
if( moving ) {
offsky = astCopy( abskyfrm );
astSet( offsky, "SkyRefIs=Origin" );
}
/* Create the Mapping from offsets within the output map sky coordinate
system output to map GRID coords to output map GRID coords. This uses a
ShiftMap to convert from output PIXEL coords (produced by "oskymap") to
output GRID coords. Note, if the target is moving, "oskymap" maps from
sky *offsets* to output map PIXEL coords. */
shift[ 0 ] = 1.5 - olbnd[ 0 ];
shift[ 1 ] = 1.5 - olbnd[ 1 ];
bsmap = astCmpMap( oskymap, astShiftMap( 2, shift, " " ), 1, " " );
} else {
/* We did not find any good TCS data so force us into tstep==1
case and end up with VAL__BADI for every element. */
tstep = 1;
itime0 = itime_lo;
msgOutiff(MSG__VERB, "", "All time slices from %zu -- %zu had bad TCS data.",
status, (size_t)itime_lo, (size_t)itime_hi );
}
}
/* Allocate memory to hold the (x,y) output map grid coords at each bolo
for a single time slice. */
outmapcoord = astMalloc( sizeof( *outmapcoord )*2*nbolo );
/* Initialise boresight position for the benefit of the tstep == 1 case. */
bsx = bsy = 0.0;
bsx0 = bsy0 = AST__BAD;
bsxlast = bsylast = AST__BAD;
/* If lon and lat arrays are to be returned, allocate memory to hold the grid
coords of every bolometer for a single sample. */
if( lon && lat ) {
wgx = astMalloc( nbolo*sizeof( *wgx ) );
wgy = astMalloc( nbolo*sizeof( *wgy ) );
}
/* Loop round each time slice. */
state = data->hdr->allState + itime_lo;
for( itime = itime_lo; itime <= itime_hi && *status == SAI__OK;
itime++,state++ ) {
/* No need to get the boresight position if we are doing full
calculations at every time slice. If this time slice has bad
TCS data then the problem will be caught in smf_rebin_totmap. */
if( tstep > 1 ) {
/* Transform the current boresight and base (if moving) positions from
tracking coords to absolute output map sky coords. */
xin[ 0 ] = state->tcs_tr_ac1;
yin[ 0 ] = state->tcs_tr_ac2;
if( moving ) {
xin[ 1 ] = state->tcs_tr_bc1;
yin[ 1 ] = state->tcs_tr_bc2;
np = 2;
} else {
np = 1;
}
astTran2( tr2skyabs, np, xin, yin, 1, xout, yout );
/* If the target is moving, find the offsets within the output map sky
coordinate system, from base to boresight at the current time slice.
These offsets become the new "boresight" position (in xin/yin). Guard
against assigning bad values to the ref pos, which can cause AST to
report errors. */
if( moving && xout[ 1 ] != AST__BAD && yout[ 1 ] != AST__BAD ) {
/* Set the current telescope base position as the reference point in
"offsky". Then get the Mapping from absolute to offset sky coords. */
astSetD( offsky, "SkyRef(1)", xout[ 1 ] );
astSetD( offsky, "SkyRef(2)", yout[ 1 ] );
offmap = astSkyOffsetMap( offsky );
/* Use this Mapping to convert the current boresight position from
absolute sky coords to offsets from the current base position. */
astTran2( offmap, 1, xout, yout, 1, xin, yin );
/* Annul the Mapping to avoid keep the number of AST objects to a minimum. */
offmap = astAnnul( offmap );
/* If the target is stationary, we can just use the absolute boresight
position as it is. */
} else {
xin[ 0 ] = xout[ 0 ];
yin[ 0 ] = yout[ 0 ];
}
/* Transform the above boresight position from output map sky coords to output
map GRID coords. */
astTran2( bsmap, 1, xin, yin, 1, &bsx, &bsy );
}
/* If we have reached the next full calculation... */
if( itime == itime0 ) {
/* Calculate the full bolometer to map-pixel transformation for the current
time slice */
fullmap = smf_rebin_totmap( data, itime, abskyfrm, oskymap, moving,
fts_port, status );
/* If succesful, use it to transform every bolometer position from bolo
GRID coords to output map GRID coords. */
if( fullmap ) {
itime0 += tstep;
astTranGrid( fullmap, 2, lbnd_in, ubnd_in, 0.1, 1000000, 1,
2, nbolo, outmapcoord );
fullmap = astAnnul( fullmap );
/* Record the boresight grid coords at this time slice. */
bsx0 = bsx;
bsy0 = bsy;
/* If we cannot determine a full Mapping for this time slice, move the
node to the next time slice (otherwise we would loose all the data to
the next node), and set the boresight position bad to indicate we
have no mapping for this time slice. */
} else {
itime0++;
bsx0 = AST__BAD;
bsy0 = AST__BAD;
}
}
/* Get the offset from the boresight position at the previous full
calculation and the current boresight position, in output map GRID
coords. */
dx = ( bsx != AST__BAD && bsx0 != AST__BAD ) ? bsx - bsx0 : AST__BAD;
dy = ( bsy != AST__BAD && bsy0 != AST__BAD ) ? bsy - bsy0 : AST__BAD;
/* Work out the scan direction based on the GRID offsets between this and
the previous time slice. Angles are calculated using atan2, with values
ranging from -pi to +pi. */
if( angle ) {
double theta = AST__BAD;
dxlast = ( bsx != AST__BAD && bsxlast != AST__BAD ) ?
bsx - bsxlast : AST__BAD;
dylast = ( bsy != AST__BAD && bsylast != AST__BAD ) ?
bsy - bsylast : AST__BAD;
if( dxlast != AST__BAD && dylast != AST__BAD &&
!( !dxlast && !dylast ) ) {
theta = atan2( dylast, dxlast );
}
angle[itime-itime_lo] = theta;
bsxlast = bsx;
bsylast = bsy;
}
/* Initialise pointers to the place to store the final grid coords for
each bolometer. */
pgx = wgx;
pgy = wgy;
/* Loop round all bolometers. */
px = outmapcoord;
py = outmapcoord + nbolo;
for( ibolo = 0; ibolo < nbolo; ibolo++ ){
/* If good, get the x and y output map GRID coords for this bolometer. */
if( dx != AST__BAD && dy != AST__BAD ) {
x = *(px++) + dx;
y = *(py++) + dy;
/* If required, store them so that we can convert them into lon/lat
values later. */
if( pgx && pgy ) {
*(pgx++) = x;
*(pgy++) = y;
}
/* Find the grid indices (minus one) of the output map pixel containing the
mapped bolo grid coords. One is subtracted in order to simplify the
subsequent calculation of the vector index. */
ox = (int) ( x - 0.5 );
oy = (int) ( y - 0.5 );
/* Check it is within the output map */
if( ox >= 0 && ox < odimx && oy >= 0 && oy < odimy ) {
/* Find the 1-dimensional vector index into the output array for this
pixel and store in the next element of the returned LUT. */
lut[ ilut++ ] = ox + oy*odimx;
/* Store a bad value for points that are off the edge of the output map. */
} else {
lut[ ilut++ ] = VAL__BADI;
}
/* If good, store a bad index in the LUT and move on to the next pixel. */
} else {
lut[ ilut++ ] = VAL__BADI;
px++;
py++;
if( pgx && pgy ) {
*(pgx++) = AST__BAD;
*(pgy++) = AST__BAD;
}
}
}
/* If required transform the grid coords into (lon,lat) coords and store in
the relevant elements of the supplied "lon" and "lat" arrays. */
if( wgx && wgy ) {
astTran2( oskymap, nbolo, wgx, wgy, 0, lon + itime*nbolo,
lat + itime*nbolo );
/* Convert from rads to degs. */
pgx = lon + itime*nbolo;
pgy = lat + itime*nbolo;
for( ibolo = 0; ibolo < nbolo; ibolo++ ) {
if( *pgx != AST__BAD && *pgy != AST__BAD ) {
*(pgx++) *= AST__DR2D;
*(pgy++) *= AST__DR2D;
} else {
pgx++;
pgy++;
}
}
}
}
/* To obtain a reasonable value for the first entry of angle, we simply
duplicate the second value. */
if( angle && (itime_hi > itime_lo) ) {
angle[0] = angle[1];
}
/* Free remaining work space. */
outmapcoord = astFree( outmapcoord );
wgx = astFree( wgx );
wgy = astFree( wgy );
/* Export the WCS pointer in the data header since it will be annulled at
a higher level. Note the FrameSet pointer may be null if the last
full calculation was for a slice with bad telescope data. */
if( data->hdr->wcs ) astExport( data->hdr->wcs );
/* End the AST context. */
astEnd;
}
/* Returns an array holding the angle (rad.s) from north to focal plane Y,
measured positive in the sense of rotation from focal plane Y to focal
plane X, for every bolometer sample in a smfData. The values are bolo
ordered so that "bstride" is 1 and "tstsride" is nbolo. The returned
array should be freed using astFre when no longer needed. */
static double *smf1_calcang( smfData *data, int *status ){
/* Local Variables: */
AstFrameSet *fpfset;
AstFrameSet *wcs;
AstMapping *g2s;
AstMapping *s2f;
const char *usesys;
dim_t ibolo;
dim_t itime;
dim_t nbolo;
dim_t ncol;
dim_t ntslice;
double *fx2;
double *fx;
double *fy2;
double *fy;
double *gx;
double *gy;
double *pr;
double *result;
double *sx;
double *sy;
int subsysnum;
/* Check the inherited status. */
if( *status != SAI__OK ) return NULL;
/* Get the number of bolometers and time slices, together with the strides
between adjacent bolometers and adjacent time slices. */
smf_get_dims( data, NULL, &ncol, &nbolo, &ntslice, NULL, NULL, NULL,
status );
/* Allocate the returned array. */
result = astMalloc( nbolo*ntslice*sizeof( *result ) );
/* Allocate arrays to hold the grid coords for every bolometer. */
gx = astMalloc( nbolo*sizeof( *gx ) );
gy = astMalloc( nbolo*sizeof( *gy ) );
/* Allocate arrays to hold the sky coords for every bolometer. */
sx = astMalloc( nbolo*sizeof( *sx ) );
sy = astMalloc( nbolo*sizeof( *sy ) );
/* Allocate arrays to hold the focal plane coords for every bolometer. */
fx = astMalloc( nbolo*sizeof( *fx ) );
fy = astMalloc( nbolo*sizeof( *fy ) );
/* Allocate arrays to hold the focal plane coords of a point slightly to
the north of every bolometer. */
fx2 = astMalloc( nbolo*sizeof( *fx2 ) );
fy2 = astMalloc( nbolo*sizeof( *fy2 ) );
/* Get the AST code equivalent to the tracking system. */
usesys = sc2ast_convert_system( (data->hdr->allState)[0].tcs_tr_sys, status );
if( *status == SAI__OK ) {
/* Initialise the arrays holding the grid coords for every bolometer. */
for( ibolo = 0; ibolo < nbolo; ibolo++ ) {
gx[ ibolo ] = ibolo % ncol + 1;
gy[ ibolo ] = ibolo / ncol + 1;
}
/* Get the GRID->focal plane FrameSet (the same for every time slice). */
smf_find_subarray( data->hdr, NULL, 0, &subsysnum, status );
sc2ast_createwcs( subsysnum, NULL, data->hdr->instap, data->hdr->telpos,
NO_FTS, &fpfset, status);
/* Use this to transform the bolometrer GRID coords to focal plane. */
astTran2( fpfset, nbolo, gx, gy, 1, fx, fy );
/* Loop over all time slices. */
pr = result;
for( itime = 0; itime < ntslice; itime++ ) {
/* Get the WCS FrameSet for the time slice, and set its current Frame to the tracking
frame. */
smf_tslice_ast( data, itime, 1, NO_FTS, status );
wcs = data->hdr->wcs;
if( wcs ) {
astSetC( wcs, "System", usesys );
/* Get the mapping from GRID to SKY. */
astBegin;
g2s = astSimplify( astGetMapping( wcs, AST__BASE, AST__CURRENT ));
/* Get the mapping from SKY to focal plane (x,y) (the index of the FPLANE
Frame is fixed at 3 by file sc2ast.c). */
s2f = astSimplify( astGetMapping( wcs, AST__CURRENT, 3 ) );
/* Transform the grid coords of all bolometers to SKY coordinates using the FrameSet. */
astTran2( g2s, nbolo, gx, gy, 1, sx, sy );
/* Increment the sky positions slightly to the north. */
for( ibolo = 0; ibolo < nbolo; ibolo++ ) sy[ ibolo ] += 1.0E-6;
/* Transform these modified sky coordinates to focal plane. */
astTran2( s2f, nbolo, sx, sy, 1, fx2, fy2 );
astEnd;
/* Loop round all bolometers. */
for( ibolo = 0; ibolo < nbolo; ibolo++ ) {
/* Get the angle from north to focal plane Y, measured positive in the
sense of rotation from focal plane Y to focal plane X. */
if( fx[ibolo] != VAL__BADD && fy[ibolo] != VAL__BADD &&
fx2[ibolo] != VAL__BADD && fy2[ibolo] != VAL__BADD ) {
*(pr++) = atan2( fx[ibolo] - fx2[ibolo], fy2[ibolo] - fy[ibolo] );
} else {
*(pr++) = VAL__BADD;
}
}
} else {
for( ibolo = 0; ibolo < nbolo; ibolo++ ) *(pr++) = VAL__BADD;
}
}
}
/* Free resources. */
fx = astFree( fx );
fy = astFree( fy );
fx2 = astFree( fx2 );
fy2 = astFree( fy2 );
sx = astFree( sx );
sy = astFree( sy );
gx = astFree( gx );
gy = astFree( gy );
/* Return the array of angle values. */
return result;
}
void smurf_jsatileinfo( int *status ) {
/* Local Variables */
AstCmpRegion *overlap;
AstFitsChan *fc;
AstFrameSet *fs;
AstObject *obj;
AstRegion *region;
AstRegion *target;
HDSLoc *cloc = NULL;
HDSLoc *xloc = NULL;
char *jcmt_tiles;
char *tilendf = NULL;
char text[ 200 ];
double dec[ 8 ];
double dist;
double dlbnd[ 2 ];
double dubnd[ 2 ];
double gx[ 8 ];
double gy[ 8 ];
double maxdist;
double norm_radec[2];
double point1[ 2 ];
double point2[ 2 ];
double ra[ 8 ];
double ra0;
double dec0;
int *ipntr;
int axes[ 2 ];
int create;
int dirlen;
int el;
int exists;
int flag;
int i;
int indf1;
int indf2;
int indf3;
int itile;
int iv;
int jtile;
int lbnd[ 2 ];
int local_origin;
int nc;
int place;
int tlbnd[ 2 ];
int tubnd[ 2 ];
int ubnd[ 2 ];
smf_jsaproj_t proj;
int xt;
int yt;
smfJSATiling skytiling;
void *pntr;
/* Check inherited status */
if( *status != SAI__OK ) return;
/* Start a new AST context. */
astBegin;
/* Get the instrument to use abnd get the parameters describing the
layout of its JSA tiles. */
smf_jsainstrument( "INSTRUMENT", NULL, SMF__INST_NONE, &skytiling,
status );
/* Return the maximum tile index. */
parPut0i( "MAXTILE", skytiling.ntiles - 1, status );
/* Abort if an error has occurred. */
if( *status != SAI__OK ) goto L999;
/* Decide what sort of projection to use. */
parChoic( "PROJ", "HPX", "HPX,HPX12,XPHN,XPHS", 1, text, sizeof(text),
status );
proj = smf_jsaproj_fromstr( text, 1, status );
/* If required, create an all-sky NDF in which each pixel covers the area
of a single tile, and holds the integer tile index. The NDF has an
initial size of 1x1 pixels, but is expanded later to the required size. */
lbnd[ 0 ] = ubnd[ 0 ] = lbnd[ 1 ] = ubnd[ 1 ] = 1;
ndfCreat( "ALLSKY", "_INTEGER", 2, lbnd, ubnd, &indf3, status );
/* If a null (!) value was supplied for parameter ALLSKY, annull the
error and pass on. */
if( *status == PAR__NULL ) {
errAnnul( status );
/* Otherwise, create a FrameSet describing the whole sky in which each
pixel corresponds to a single tile. */
} else {
smf_jsatile( -1, &skytiling, 0, proj, NULL, &fs, NULL, lbnd, ubnd,
status );
/* Change the bounds of the output NDF. */
ndfSbnd( 2, lbnd, ubnd, indf3, status );
/* Store the FrameSet in the NDF. */
ndfPtwcs( fs, indf3, status );
/* Map the data array. */
ndfMap( indf3, "Data", "_INTEGER", "WRITE/BAD", (void **) &ipntr, &el,
status );
/* Create all-sky map using XPH projection. */
if( *status == SAI__OK ) {
/* Loop round every tile index. */
for( jtile = 0; jtile < skytiling.ntiles; jtile++ ) {
/* Get the zero-based (x,y) indices of the tile within an HPX projection.
This flips the bottom left half-facet up to the top right. */
smf_jsatilei2xy( jtile, &skytiling, &xt, &yt, NULL, status );
/* Convert these HPX indices to the corresponding indices within the
required projection. Note, the lower left facet is split by the above
call to smf_jsatilei2xy tile (i.e. (xt,yt) indices are *not* in the
"raw" mode). For instance, (0,0) is not a valid tile. */
smf_jsatilexyconv( &skytiling, proj, xt, yt, 0, &xt, &yt, status );
/* Get the vector index of the corresponding element of the all-sky NDF. */
if( proj == SMF__JSA_HPX || proj == SMF__JSA_HPX12 ) {
iv = xt + 5*skytiling.ntpf*yt;
} else {
iv = xt + 4*skytiling.ntpf*yt;
}
/* Report an error if this element has already been assigned a tile
index. Otherwise, store the tile index. */
if( ipntr[ iv ] == VAL__BADI ) {
ipntr[ iv ] = jtile;
} else if( *status == SAI__OK ) {
*status = SAI__ERROR;
errRepf( "", "%s projection assigns multiple tiles to "
"pixel (%d,%d).", status, text, xt, yt );
break;
}
}
}
/* Store NDF title. */
sprintf( text, "JSA tile indices for %s data", skytiling.name );
ndfCput( text, indf3, "TITLE", status );
/* Store the instrument as a component in the SMURF extension. */
ndfXnew( indf3, "SMURF", "INSTRUMENT", 0, 0, &xloc, status );
ndfXpt0c( skytiling.name, indf3, "SMURF", "INSTRUMENT", status );
datAnnul( &xloc, status );
/* Close the NDF. */
ndfAnnul( &indf3, status );
}
/* Abort if an error has occurred. */
if( *status != SAI__OK ) goto L999;
/* Get the zero-based index of the required tile. If a null value is
supplied, annull the error and skip to the end. */
parGdr0i( "ITILE", 0, 0, skytiling.ntiles - 1, 0, &itile, status );
if( *status == PAR__NULL ) {
errAnnul( status );
goto L999;
}
/* See if the pixel origin is to be at the centre of the tile. */
parGet0l( "LOCAL", &local_origin, status );
/* Display the tile number. */
msgBlank( status );
msgSeti( "ITILE", itile );
msgSeti( "MAXTILE", skytiling.ntiles - 1);
msgOut( " ", " Tile ^ITILE (from 0 to ^MAXTILE):", status );
/* Get the FITS header, FrameSet and Region defining the tile, and the tile
bounds in pixel indices. */
smf_jsatile( itile, &skytiling, local_origin, proj, &fc, &fs, ®ion,
lbnd, ubnd, status );
/* Write the FITS headers out to a file, annulling the error if the
header is not required. */
if( *status == SAI__OK ) {
atlDumpFits( "HEADER", fc, status );
if( *status == PAR__NULL ) errAnnul( status );
}
/* If required, write the Region out to a text file. */
if( *status == SAI__OK ) {
atlCreat( "REGION", (AstObject *) region, status );
if( *status == PAR__NULL ) errAnnul( status );
}
/* Store the lower and upper pixel bounds of the tile. */
parPut1i( "LBND", 2, lbnd, status );
parPut1i( "UBND", 2, ubnd, status );
/* Display pixel bounds on the screen. */
msgSeti( "XL", lbnd[ 0 ] );
msgSeti( "XU", ubnd[ 0 ] );
msgSeti( "YL", lbnd[ 1 ] );
msgSeti( "YU", ubnd[ 1 ] );
msgOut( " ", " Pixel bounds: (^XL:^XU,^YL:^YU)", status );
/* Get the RA,Dec at the tile centre. */
if( astTest( fs, "SkyRef" ) ) {
ra0 = astGetD( fs, "SkyRef(1)" );
dec0 = astGetD( fs, "SkyRef(2)" );
/* Format the central RA and Dec. and display. Call astNorm on the
coordinates provided that the frame set has the correct number of
axes (which it should as it comes from smf_jsatile). */
norm_radec[0] = ra0;
norm_radec[1] = dec0;
if (astGetI(fs, "Naxes") == 2) astNorm(fs, norm_radec);
msgSetc( "RACEN", astFormat( fs, 1, norm_radec[ 0 ] ));
msgSetc( "DECCEN", astFormat( fs, 2, norm_radec[ 1 ] ));
msgOut( " ", " Centre (ICRS): RA=^RACEN DEC=^DECCEN", status );
/* Transform a collection of points on the edge of the region (corners and
side mid-points) from GRID coords to RA,Dec. */
point1[ 0 ] = 0.5;
point1[ 1 ] = 0.5;
point2[ 0 ] = ubnd[ 0 ] - lbnd[ 0 ] + 1;
point2[ 1 ] = ubnd[ 1 ] - lbnd[ 1 ] + 1;
gx[ 0 ] = point1[ 0 ]; /* Bottom left */
gy[ 0 ] = point1[ 1 ];
gx[ 1 ] = point1[ 0 ]; /* Centre left */
gy[ 1 ] = gy[ 0 ];
gx[ 2 ] = point1[ 0 ]; /* Top left */
gy[ 2 ] = point2[ 1 ];
gx[ 3 ] = gx[ 0 ]; /* Top centre */
gy[ 3 ] = point2[ 1 ];
gx[ 4 ] = point2[ 0 ]; /* Top right */
gy[ 4 ] = point2[ 1 ];
gx[ 5 ] = point2[ 0 ]; /* Centre right */
gy[ 5 ] = gy[ 0 ];
gx[ 6 ] = point2[ 0 ]; /* Bottom right */
gy[ 6 ] = point1[ 1 ];
gx[ 7 ] = gx[ 0 ]; /* Bottom centre */
gy[ 7 ] = point1[ 1 ];
astTran2( fs, 8, gx, gy, 1, ra, dec );
/* Find the arc-distance from the centre to the furthest point from the
centre. */
point1[ 0 ] = ra0;
point1[ 1 ] = dec0;
maxdist = -1.0;
for( i = 1; i < 8; i++ ) {
if( ra[ i ] != AST__BAD && dec[ i ] != AST__BAD ) {
point2[ 0 ] = ra[ i ];
point2[ 1 ] = dec[ i ];
dist = astDistance( fs, point1, point2 );
if( dist > maxdist ) maxdist = dist;
}
}
/* Convert from radius to diameter. */
maxdist *= 2.0;
/* Format this size as a dec value (i.e. arc-distance) and display it. */
if( maxdist > 0.0 ) {
msgSetc( "SIZE", astFormat( fs, 2, maxdist ) );
msgOut( " ", " Size: ^SIZE", status );
} else {
maxdist = AST__BAD;
msgOut( " ", " Size: <unknown>", status );
}
/* If a discontinuity passes through the tile, the centre and size may be
unknown. */
} else {
ra0 = AST__BAD;
dec0 = AST__BAD;
maxdist = AST__BAD;
msgOut( " ", " Centre (ICRS): RA=<unknown> DEC=<unknown>", status );
msgOut( " ", " Size: <unknown>", status );
}
/* Write the tile centre ra and dec in radians to the output parameters. */
parPut0d( "RACEN", norm_radec[ 0 ], status );
parPut0d( "DECCEN", norm_radec[ 1 ], status );
/* Write the size to the output parameter as radians. */
parPut0d( "SIZE", maxdist, status );
/* Get the translation of the environment variable JSA_TILE_DIR. */
jcmt_tiles = getenv( "JSA_TILE_DIR" );
/* Initialise the path to the tile's NDF to hold the root directory.
Use the current working directory if JSA_TILE_DIR is undefined. */
if( jcmt_tiles ) {
nc = 0;
tilendf = astAppendString( tilendf, &nc, jcmt_tiles );
} else {
nc = 512;
jcmt_tiles = astMalloc( nc );
while( !getcwd( jcmt_tiles, nc ) ) {
nc *= 2;
jcmt_tiles = astRealloc( jcmt_tiles, nc );
}
nc = 0;
tilendf = astAppendString( tilendf, &nc, jcmt_tiles );
jcmt_tiles = astFree( jcmt_tiles );
}
/* Complete the path to the tile's NDF. */
tilendf = astAppendString( tilendf, &nc, "/" );
tilendf = astAppendString( tilendf, &nc, skytiling.subdir );
dirlen = nc;
sprintf( text, "/tile_%d.sdf", itile );
tilendf = astAppendString( tilendf, &nc, text );
/* Write it to the output parameter. */
parPut0c( "TILENDF", tilendf, status );
/* See if the NDF exists, and store the flag in the output parameter. */
exists = access( tilendf, F_OK ) ? 0 : 1;
parPut0l( "EXISTS", exists, status );
/* If the NDF does not exist, create it if required. */
parGet0l( "CREATE", &create, status );
if( !exists && create && *status == SAI__OK ) {
/* Write the NDF info to the screen. */
msgSetc( "NDF", tilendf );
msgOutif( MSG__NORM, " ", " NDF: ^NDF (created)", status );
/* Temporarily terminate the NDF path at the end of the subdirectory. */
tilendf[ dirlen ] = 0;
/* Create the required directory (does nothing if the directory
already exists). It is given read/write/search permissions for owner
and group, and read/search permissions for others. */
(void) mkdir( tilendf, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH );
/* Replace the character temporarily overwritten above. */
tilendf[ dirlen ] = '/';
/* Now create the tile's NDF. */
ndfPlace( NULL, tilendf, &place, status );
ndfNew( skytiling.type, 2, lbnd, ubnd, &place, &indf1, status );
/* Fill its data array with zeros. */
ndfMap( indf1, "Data", skytiling.type, "WRITE/ZERO", &pntr, &el,
status );
/* Store the WCS FrameSet. */
ndfPtwcs( fs, indf1, status );
/* If the instrument jsatiles.have variance, fill the variance array with zeros. */
if( skytiling.var ) {
ndfMap( indf1, "Variance", skytiling.type, "WRITE/ZERO", &pntr,
&el, status );
}
/* Create a SMURF extension. */
ndfXnew( indf1, SMURF__EXTNAME, SMURF__EXTTYPE, 0, NULL, &xloc, status );
/* Store the tile number and instrument name in the extension. */
datNew0I( xloc, "TILE", status );
datFind( xloc, "TILE", &cloc, status );
datPut0I( cloc, itile, status );
datAnnul( &cloc, status );
datNew0C( xloc, "INSTRUMENT", strlen( skytiling.name ), status );
datFind( xloc, "INSTRUMENT", &cloc, status );
datPut0C( cloc, skytiling.name, status );
datAnnul( &cloc, status );
/* Create a weights NDF within the SMURF extension, and fill its data
array with zeros. */
ndfPlace( xloc, "WEIGHTS", &place, status );
ndfNew( skytiling.type, 2, lbnd, ubnd, &place, &indf2, status );
ndfMap( indf2, "Data", skytiling.type, "WRITE/ZERO", &pntr, &el,
status );
ndfPtwcs( fs, indf2, status );
ndfAnnul( &indf2, status );
/* Annul the extension locator and the main NDF identifier. */
datAnnul( &xloc, status );
ndfAnnul( &indf1, status );
/* Write the NDF info to the screen. */
} else {
msgSetc( "NDF", tilendf );
msgSetc( "E", exists ? "exists" : "does not exist" );
msgOut( " ", " NDF: ^NDF (^E)", status );
}
/* Initialise TBND and TLBND to indicate no overlap. */
tlbnd[ 0 ] = 1;
tlbnd[ 1 ] = 1;
tubnd[ 0 ] = 0;
tubnd[ 1 ] = 0;
/* Attempt to to get an AST Region (assumed to be in some 2D sky coordinate
system) using parameter "TARGET". */
if( *status == SAI__OK ) {
kpg1Gtobj( "TARGET", "Region",
(void (*)( void )) F77_EXTERNAL_NAME(ast_isaregion),
&obj, status );
/* Annul the error if none was obtained. */
if( *status == PAR__NULL ) {
errAnnul( status );
/* Otherwise, use the supplied object. */
} else {
target = (AstRegion *) obj;
/* If the target Region is 3-dimensional, remove the third axis, which
is assumed to be a spectral axis. */
if( astGetI( target, "Naxes" ) == 3 ) {
axes[ 0 ] = 1;
axes[ 1 ] = 2;
target = astPickAxes( target, 2, axes, NULL );
}
/* See if there is any overlap between the target and the tile. */
overlap = NULL;
flag = astOverlap( region, target );
if( flag == 0 ) {
msgOut( "", " Cannot convert between the coordinate system of the "
"supplied target and the tile.", status );
} else if( flag == 1 || flag == 6 ) {
msgOut( "", " There is no overlap between the target and the tile.",
status );
} else if( flag == 2 ) {
msgOut( "", " The tile is contained within the target.",
status );
tlbnd[ 0 ] = lbnd[ 0 ];
tlbnd[ 1 ] = lbnd[ 1 ];
tubnd[ 0 ] = ubnd[ 0 ];
tubnd[ 1 ] = ubnd[ 1 ];
} else if( flag == 3 ) {
overlap = astCmpRegion( region, target, AST__AND, " " );
} else if( flag == 4 ) {
overlap = astCmpRegion( region, target, AST__AND, " " );
} else if( flag == 5 ) {
msgOut( "", " The target and tile are identical.",
status );
tlbnd[ 0 ] = lbnd[ 0 ];
tlbnd[ 1 ] = lbnd[ 1 ];
tubnd[ 0 ] = ubnd[ 0 ];
tubnd[ 1 ] = ubnd[ 1 ];
} else if( *status == SAI__OK ) {
*status = SAI__OK;
errRepf( "", "Unexpected value %d returned by astOverlap "
"(programming error).", status, flag );
}
/* If a region containing the intersection of the tile and target was
created above, map it into the grid coordinate system of the tile. */
if( overlap ) {
overlap = astMapRegion( overlap, astGetMapping( fs, AST__CURRENT,
AST__BASE ),
astGetFrame( fs, AST__BASE ) );
/* Get its GRID bounds. */
astGetRegionBounds( overlap, dlbnd, dubnd );
/* Convert to integer. */
tlbnd[ 0 ] = ceil( dlbnd[ 0 ] - 0.5 );
tlbnd[ 1 ] = ceil( dlbnd[ 1 ] - 0.5 );
tubnd[ 0 ] = ceil( dubnd[ 0 ] - 0.5 );
tubnd[ 1 ] = ceil( dubnd[ 1 ] - 0.5 );
/* Convert to PIXEL indices within the tile. */
tlbnd[ 0 ] += lbnd[ 0 ] - 1;
tlbnd[ 1 ] += lbnd[ 1 ] - 1;
tubnd[ 0 ] += lbnd[ 0 ] - 1;
tubnd[ 1 ] += lbnd[ 1 ] - 1;
msgOutf( "", " The target overlaps section (%d:%d,%d:%d).",
status, tlbnd[ 0 ], tubnd[ 0 ], tlbnd[ 1 ], tubnd[ 1 ] );
}
}
}
/* Store the pixel index bounds of the tiles overlap with the target. */
parPut1i( "TLBND", 2, tlbnd, status );
parPut1i( "TUBND", 2, tubnd, status );
/* Arrive here if an error occurs. */
L999:;
/* Free resources. */
tilendf = astFree( tilendf );
/* End the AST context. */
astEnd;
/* Issue a status indication.*/
msgBlank( status );
if( *status == SAI__OK ) {
msgOutif( MSG__VERB, "", "JSATILEINFO succeeded.", status);
} else {
msgOutif( MSG__VERB, "", "JSATILEINFO failed.", status);
}
}
void smf_calc_iqu( ThrWorkForce *wf, smfData *data, int block_start,
int block_end, int ipolcrd, int qplace, int uplace,
int iplace, NdgProvenance *oprov, AstFitsChan *fc,
int pasign, double paoff, double angrot, int submean,
int harmonic, int *status ){
/* Local Variables: */
AstCmpMap *cm1;
AstCmpMap *cm2;
AstFrameSet *wcs; /* WCS FrameSet for output NDFs */
AstMapping *fpmap1;
AstMapping *fpmap2;
AstMapping *oskymap;
AstMapping *totmap;
AstSkyFrame *oskyfrm;
AstWinMap *wm; /* Mapping to reverse the X GRID axis */
const JCMTState *state; /* JCMTState info for current time slice */
const char *usesys; /* Used system string */
dim_t itime; /* Time slice index */
dim_t nbolo; /* No. of bolometers */
dim_t ncol; /* No. of columns of bolometers */
dim_t nrow; /* No. of rows of bolometers */
dim_t ntime; /* Time slices to check */
dim_t ntslice; /* Number of time-slices in data */
double *ipi; /* Pointer to output I array */
double *ipiv; /* Pointer to output I variance array */
double *ipq; /* Pointer to output Q array */
double *ipqv; /* Pointer to output Q variance array */
double *ipu; /* Pointer to output U array */
double *ipuv; /* Pointer to output U variance array */
double *mean;
double ang_data[2];
double fox[2];
double foy[2];
double fpr0;
double fprinc;
double fx[2];
double fy[2];
double ina[ 2 ]; /* Bolometer coords at bottom left */
double inb[ 2 ]; /* Bolometer coords at top right */
double outa[ 2 ]; /* NDF GRID coords at bottom left */
double outb[ 2 ]; /* NDF GRID coords at top right */
int bstep; /* Bolometer step between threads */
int el; /* Number of mapped array elements */
int gotvar; /* Were any output variances created? */
int indfi; /* Identifier for NDF holding I values */
int indfq; /* Identifier for NDF holding Q values */
int indfu; /* Identifier for NDF holding Q values */
int iworker; /* Index of a worker thread */
int lbnd[ 2 ]; /* Lower pixel bounds of output NDF */
int moving;
int nworker; /* No. of worker threads */
int old; /* Data has old-style POL_ANG values? */
int tstep; /* Time slice step between threads */
int ubnd[ 2 ]; /* Upper pixel bounds of output NDF */
size_t bstride; /* Stride between adjacent bolometer values */
size_t tstride; /* Stride between adjacent time slice values */
smfCalcIQUJobData *job_data = NULL; /* Pointer to all job data */
smfCalcIQUJobData *pdata = NULL;/* Pointer to next job data */
smfHead *hdr; /* Pointer to data header this time slice */
/* Check the inherited status. */
if( *status != SAI__OK ) return;
/* Convenience pointers. */
hdr = data->hdr;
/* Obtain number of time slices - will also check for 3d-ness. Also get
the dimensions of the bolometer array and the strides between adjacent
bolometer values. */
smf_get_dims( data, &nrow, &ncol, &nbolo, &ntslice, NULL, &bstride,
&tstride, status );
/* Report an error if the block of time slices extends of either end. */
if( block_start < 0 || block_end >= (int) ntslice ) {
if( *status == SAI__OK ) {
*status = SAI__ERROR;
msgSeti( "S", block_start );
msgSeti( "E", block_end );
msgSeti( "N", ntslice );
errRep( " ", "smf_calc_iqu: invalid block of time slices - ^S to "
"^E (^N time slices are available).", status );
}
}
/* Create the output NDFs. Each one is a 2D array with dimensions
equal to the bolometer array. */
lbnd[ 0 ] = 1;
lbnd[ 1 ] = 1;
ubnd[ 0 ] = ncol;
ubnd[ 1 ] = nrow;
ndfNew( "_DOUBLE", 2, lbnd, ubnd, &qplace, &indfq, status );
ndfNew( "_DOUBLE", 2, lbnd, ubnd, &uplace, &indfu, status );
if( iplace != NDF__NOPL ) {
ndfNew( "_DOUBLE", 2, lbnd, ubnd, &iplace, &indfi, status );
} else {
indfi = NDF__NOID;
}
/* Store any supplied provenance in all NDFs. */
if( oprov ) {
ndgWriteProv( oprov, indfq, 1, status );
ndgWriteProv( oprov, indfu, 1, status );
if( indfi != NDF__NOID ) ndgWriteProv( oprov, indfi, 1, status );
}
/* Store any supplied FITS headers in all NDFs.*/
if( fc && astGetI( fc, "NCard" ) > 0 ) {
kpgPtfts( indfq, fc, status );
kpgPtfts( indfu, fc, status );
if( indfi != NDF__NOID ) kpgPtfts( indfi, fc, status );
}
/* Store the WCS frameSet in all NDFs. First get the FrameSet for the
central time slice in the block, and set its current Frame to the
tracking frame. */
smf_tslice_ast( data, ( block_start + block_end )/2, 1, NO_FTS, status);
usesys = sc2ast_convert_system( (data->hdr->allState)[0].tcs_tr_sys,
status );
astSetC( hdr->wcs, "System", usesys );
/* Get the Mapping from focal plane coords to bolometer grid coords. This
is the same for all time slices. sc2ast ensures that frame 3 is FPLANE. */
fpmap1 = astGetMapping( hdr->wcs, 3, AST__BASE );
/* Take a copy and then reverse the X axis of the GRID Frame by remaping the
base Frame using a WinMap. This produces a pixel grid such as you would
see by looking up at the sky from underneath the array, rather than looking
down at the ground from above the array. */
wcs = astCopy( hdr->wcs );
ina[ 0 ] = 1.0;
inb[ 0 ] = ncol;
ina[ 1 ] = 1.0;
inb[ 1 ] = nrow;
outa[ 0 ] = ncol;
outb[ 0 ] = 1.0;
outa[ 1 ] = 1.0;
outb[ 1 ] = nrow;
wm = astWinMap( 2, ina, inb, outa, outb, " " );
astRemapFrame( wcs, AST__BASE, wm );
wm = astAnnul( wm );
/* Get the Mapping from output grid coords to focal plane coords. */
fpmap2 = astGetMapping( wcs, AST__BASE, 3 );
/* If the target is moving (assumed to be the case if the tracking
system is AZEL or GAPPT), make the FrameSet current Frame represent
offsets from the reference position (i.e. the moving target), and
indicate that the offset coord system should be used for alignment. */
if( !strcmp( usesys, "AZEL" ) || !strcmp( usesys, "GAPPT" ) ){
astSet( wcs, "SkyRefIs=Origin,AlignOffset=1" );
moving = 1;
} else {
moving = 0;
}
/* Store the FrameSet in the output NDFs. */
ndfPtwcs( wcs, indfq, status );
ndfPtwcs( wcs, indfu, status );
if( indfi != NDF__NOID ) ndfPtwcs( wcs, indfi, status );
/* Map the Data array in each NDF. */
ndfMap( indfq, "Data", "_DOUBLE", "WRITE", (void **) &ipq, &el, status );
ndfMap( indfu, "Data", "_DOUBLE", "WRITE", (void **) &ipu, &el, status );
if( indfi != NDF__NOID ) {
ndfMap( indfi, "Data", "_DOUBLE", "WRITE", (void **) &ipi, &el, status );
} else {
ipi = NULL;
}
/* Map the Variance array in each NDF. */
ndfMap( indfq, "Variance", "_DOUBLE", "WRITE", (void **) &ipqv, &el, status );
ndfMap( indfu, "Variance", "_DOUBLE", "WRITE", (void **) &ipuv, &el, status );
if( indfi != NDF__NOID ) {
ndfMap( indfi, "Variance", "_DOUBLE", "WRITE", (void **) &ipiv, &el, status );
} else {
ipiv = NULL;
}
/* If required, allocate memory to hold the mean bolometer value at each
time slice. */
mean = submean ? astMalloc( ntslice*sizeof( *mean ) ) : NULL;
/* Create structures used to pass information to the worker threads. */
nworker = wf ? wf->nworker : 1;
job_data = astMalloc( nworker*sizeof( *job_data ) );
/* Check the above pointers can be used safely. */
if( *status == SAI__OK ) {
/* Go through the first thousand POL_ANG values to see if they are in
units of radians (new data) or arbitrary encoder units (old data).
They are assumed to be in radians if no POL_ANG value is larger than
20. */
old = 0;
state = hdr->allState;
ntime = ( ntslice > 1000 ) ? 1000 : ntslice;
for( itime = 0; itime < ntime; itime++,state++ ) {
if( state->pol_ang > 20 ) {
old = 1;
msgOutif( MSG__VERB, ""," POL2 data contains POL_ANG values "
"in encoder units - converting to radians.", status );
break;
}
}
/* If required, find the mean bolometer value at each time slice. */
if( submean ) {
/* Determine which time-slices are to be processed by which threads. */
tstep = ntslice/nworker;
if( tstep < 1 ) tstep = 1;
for( iworker = 0; iworker < nworker; iworker++ ) {
pdata = job_data + iworker;
pdata->block_start = iworker*tstep;
if( iworker < nworker - 1 ) {
pdata->block_end = pdata->block_start + tstep - 1;
} else {
pdata->block_end = ntslice - 1;
}
}
/* Store all the other info needed by the worker threads, and submit the
jobs to calculate the Q and U values in each bolo, and then wait for
them to complete. */
for( iworker = 0; iworker < nworker; iworker++ ) {
pdata = job_data + iworker;
pdata->bstride = bstride;
pdata->dat = data->pntr[0];
pdata->nbolo = nbolo;
pdata->qua = smf_select_qualpntr( data, NULL, status );;
pdata->tstride = tstride;
pdata->mean = mean;
pdata->action = 1;
/* Pass the job to the workforce for execution. */
thrAddJob( wf, THR__REPORT_JOB, pdata, smf1_calc_iqu_job, 0, NULL,
status );
}
/* Wait for the workforce to complete all jobs. */
thrWait( wf, status );
}
/* Get the Frame representing absolute sky coords in the output NDF,
and the Mapping from sky to grid in the output NDF. */
oskyfrm = astCopy( astGetFrame( wcs, AST__CURRENT ) );
astSet( oskyfrm, "SkyRefIs=Ignored" );
oskymap = astGetMapping( wcs, AST__CURRENT, AST__BASE );
wcs = astAnnul( wcs );
/* Find the first and last time slices, calculate the angle between the
focal pane Y axis at the time slice, and the focal plane Y axis in
the output NDF. For intervening time-slices, the angle is found by
linear interpolation between the extreme time slices. */
for( el = 0; el < 2; el++ ) {
/* Get the mapping from GRID coords in the input time slice to GRID
coords in the output. */
totmap = smf_rebin_totmap( data, el?ntslice-1:0, oskyfrm, oskymap,
moving, NO_FTS, status );
/* Modify it to be the Mapping from focal plane coords in the input time
slice to focal plane coords in the output. */
cm1 = astCmpMap( fpmap1, totmap, 1, " " );
cm2 = astCmpMap( cm1, fpmap2, 1, " " );
/* Use this Mapping to convert two points on the focal plane Y axis from
the input to the output. */
fx[0] = 0.0;
fy[0] = 0.0;
fx[1] = 0.0;
fy[1] = 4.0;
astTran2( cm2, 2, fx, fy, 1, fox, foy );
/* The angle from the focal plane Y axis in the output to the focal plane
Y axis in the input time slice, measured positive in sense of rotation
from Fy to Fx. */
ang_data[ el ] = atan2( fox[1]-fox[0], foy[1]-foy[0] );
/* Free resources for this time slice. */
totmap = astAnnul( totmap );
cm1 = astAnnul( cm1 );
cm2 = astAnnul( cm2 );
}
/* Annul objects. */
oskymap = astAnnul( oskymap );
oskyfrm = astAnnul( oskyfrm );
fpmap1 = astAnnul( fpmap1 );
fpmap2 = astAnnul( fpmap2 );
/* Get the constants of the linear relationship between focal plane
rotation and time slice index "fpr = fpr0 + itime*fprinc". */
fpr0 = ang_data[ 0 ];
fprinc = ( ang_data[ 1 ] - fpr0 )/( ntslice - 1 );
/* Determine which bolometers are to be processed by which threads. */
bstep = nbolo/nworker;
if( bstep < 1 ) bstep = 1;
for( iworker = 0; iworker < nworker; iworker++ ) {
pdata = job_data + iworker;
pdata->b1 = iworker*bstep;
pdata->b2 = pdata->b1 + bstep - 1;
}
/* Ensure that the last thread picks up any left-over bolometers */
pdata->b2 = nbolo - 1;
/* Store all the other info needed by the worker threads, and submit the
jobs to calculate the Q and U values in each bolo, and then wait for
them to complete. */
for( iworker = 0; iworker < nworker; iworker++ ) {
pdata = job_data + iworker;
pdata->bstride = bstride;
pdata->dat = data->pntr[0];;
pdata->nbolo = nbolo;
pdata->qua = smf_select_qualpntr( data, NULL, status );;
pdata->tstride = tstride;
pdata->allstates = hdr->allState;
pdata->ipq = ipq;
pdata->ipu = ipu;
pdata->ipi = ipi;
pdata->ipqv = ipqv;
pdata->ipuv = ipuv;
pdata->ipiv = ipiv;
pdata->ipolcrd = ipolcrd;
pdata->block_start = block_start;
pdata->block_end = block_end;
pdata->old = old;
pdata->ncol = ncol;
pdata->pasign = pasign ? +1: -1;
pdata->paoff = paoff;
pdata->angrot = angrot;
pdata->fpr0 = fpr0;
pdata->fprinc = fprinc;
pdata->angfac = harmonic/4.0;
pdata->action = 0;
pdata->mean = mean;
/* Pass the job to the workforce for execution. */
thrAddJob( wf, THR__REPORT_JOB, pdata, smf1_calc_iqu_job, 0, NULL,
status );
}
/* Wait for the workforce to complete all jobs. */
thrWait( wf, status );
/* See if any thread produced non-bad variance values. */
gotvar = 0;
for( iworker = 0; iworker < nworker; iworker++ ) {
pdata = job_data + iworker;
if( pdata->gotvar ) gotvar = 1;
}
/* If no variances were created, erase the Variance component and tell
the user. */
ndfUnmap( indfq, "*", status );
ndfUnmap( indfu, "*", status );
if( ipi ) ndfUnmap( indfi, "*", status );
if( !gotvar ) {
ndfReset( indfq, "Variance", status );
ndfReset( indfu, "Variance", status );
if( ipi ) ndfReset( indfi, "Variance", status );
msgOut( "", "Warning: Insufficient input data to produce variances",
status );
}
}
/* Add POLANAL Frames to the WCS FrameSet in each output NDF. This Frame
is used by POLPACK to determine the reference direction of the Stokes
vectors (focal plane Y in this case, i.e. zero-based axis 1 ). */
smf_polext( indfq, 0, 0.0, "FPLANE", 1, status );
smf_polext( indfu, 0, 0.0, "FPLANE", 1, status );
if( ipi ) smf_polext( indfi, 0, 0.0, "FPLANE", 1, status );
/* Free the two output NDFs. */
ndfAnnul( &indfq, status );
ndfAnnul( &indfu, status );
if( ipi ) ndfAnnul( &indfi, status );
/* Free other resources. */
job_data = astFree( job_data );
mean = astFree( mean );
}
void
smf_store_outputbounds (int updatepars, const int lbnd_out[3],
const int ubnd_out[3],
const AstFrameSet * wcsout,
const AstSkyFrame *oskyfrm,
const AstMapping * oskymap, int *status) {
double corner[2]; /* WCS of a corner (SKY) */
int i; /* loop counter */
double glbnd_out[ 3 ]; /* double prec Lower GRID bounds for output map */
double gubnd_out[ 3 ]; /* double prec Upper GRID bounds for output map */
double gx_in[ 4 ]; /* X Grid coordinates of four corners */
double gx_out[ 4 ]; /* X WCS coordinates of four corners */
double gy_in[ 4 ]; /* Y Grid coordinates of four corners */
double gy_out[ 4 ]; /* Y WCS coordinates of four corners */
int ndims; /* Number of active dimensions */
char tmpstr[10]; /* temporary unit string */
double wcslbnd_out[3]; /* Array of lower bounds of output cube */
double wcsubnd_out[3]; /* Array of upper bounds of output cube */
/* Parameter names associated with the bounds */
const char * bounds[] = {
"FTR", "FTL", "FBR", "FBL", NULL
};
if (*status != SAI__OK) return;
/* work out how many dimensions we have */
ndims = astGetI( wcsout, "Naxes");
/* Calculate and output the WCS bounds (matching NDFTRACE output). The bounds
are normalised. Celestial coordinates will use radians. */
for( i = 0; i < ndims; i++ ) {
glbnd_out[ i ] = 0.5;
gubnd_out[ i ] = ubnd_out[ i ] - lbnd_out[i] + 1.5;
}
for( i = 0; i < ndims; i++ ) {
astMapBox( wcsout, glbnd_out, gubnd_out, 1, i+1, &(wcslbnd_out[ i ]),
&(wcsubnd_out[ i ]), NULL, NULL );
}
astNorm( wcsout, wcslbnd_out );
astNorm( wcsout, wcsubnd_out );
/* adjust resolution of output frameset since in some cases we are interested in
sub-arcsec resolution when comparing positions with different arguments
(especially with RxA and using very small pixel sizes. Use digits() rather
than format() so that we do not have to worry about hms vs dms */
astSet( (AstFrameSet*)wcsout, "digits(1)=9,digits(2)=9" );
if (ndims == 3) {
msgOutif( MSG__NORM, "WCS_WBND1",
" Output cube WCS bounds:", status );
} else {
msgOutif( MSG__NORM, "WCS_WBND1",
" Output map WCS bounds:", status );
}
for( i = 0; i < ndims && *status == SAI__OK; i++ ) {
msgSetc( "L", astFormat( wcsout, i+1, wcslbnd_out[i]));
msgSetc( "U", astFormat( wcsout, i+1, wcsubnd_out[i]));
if( i == 2 ) {
sprintf( tmpstr, "unit(%d)", i+1 );
msgSetc( "UNT", astGetC( wcsout, tmpstr ));
} else {
msgSetc( "UNT", "" );
}
sprintf( tmpstr, "label(%d)", i + 1 );
msgSetc( "LAB", astGetC( wcsout, tmpstr ) );
msgOutif( MSG__NORM, "WCS_WBND2",
" ^LAB: ^L -> ^U ^UNT", status );
}
/* Return if we are not required to update the parameters */
if (!updatepars) return;
parPut1d( "FLBND", ndims, wcslbnd_out, status );
parPut1d( "FUBND", ndims, wcsubnd_out, status );
/* if we have a 2d frameset we can use that directly rather
than having to split the mapping or provide explicit 2d
versions. Since we know that MAKECUBE already calculates
2d mappings/frames and we also know that MAKEMAP doesn't
we provide some logic here to switch on Naxes */
if (ndims == 2) {
if (oskyfrm == NULL) oskyfrm = (AstSkyFrame*)wcsout;
if (oskymap == NULL) oskymap = (AstMapping*)wcsout;
}
/* Now also calculate the spatial coordinates of the four corners (required
for CADC science archive. First, calculate input GRID coordinates for 4
corners: TR, TL, BR, BL. Use pixel centres for reporting. This is
important for cases where the pixels are very large and we want to make
sure that we are conservative with the database reporting. */
gx_in[ 0 ] = ubnd_out[ 0 ] - lbnd_out[ 0 ] + 1.0; /* Right */
gx_in[ 1 ] = 1.0; /* Left */
gx_in[ 2 ] = gx_in[ 0 ]; /* Right */
gx_in[ 3 ] = gx_in[ 1 ]; /* Left */
gy_in[ 0 ] = ubnd_out[ 1 ] - lbnd_out[ 1 ] + 1.0; /* Top */
gy_in[ 1 ] = gy_in[ 0 ]; /* Top */
gy_in[ 2 ] = 1.0; /* Bottom */
gy_in[ 3 ] = gy_in[ 2 ]; /* Bottom */
astTran2( oskymap, 4, gx_in, gy_in, 1, gx_out, gy_out );
/* Store the bounds in the parameters */
for (i = 0; i < 4; i++) {
corner[ 0 ] = gx_out[ i ];
corner[ 1 ] = gy_out[ i ];
astNorm( oskyfrm, corner );
parPut1d( bounds[i], 2, corner, status );
}
}
static void smf1_fit_qui_job( void *job_data, int *status ) {
/*
* Name:
* smf1_fit_qui_job
* Purpose:
* Calculate I, Q and U for a block of bolometers.
* Invocation:
* void smf1_fit_qui_job( void *job_data, int *status )
* Arguments:
* job_data = void * (Given)
* Pointer to the data needed by the job. Should be a pointer to a
* smfFitQUIJobData structure.
* status = int * (Given and Returned)
* Pointer to global status.
* Description:
* This routine calculate the I, Q and U values for each bolometer in
* a block of bolometers. It runs within a thread instigated by
* smf_fit_qui.
*/
/* Local Variables: */
AstFrameSet *wcs; /* WCS FrameSet for current time slice */
AstMapping *g2s; /* GRID to SKY mapping */
AstMapping *s2f; /* SKY to focal plane mapping */
const JCMTState *allstates;/* Pointer to array of JCMTState structures */
const JCMTState *state; /* JCMTState info for current time slice */
dim_t b1; /* First bolometer index */
dim_t b2; /* Last bolometer index */
dim_t box_size; /* NFirst time slice in box */
dim_t ibolo; /* Bolometer index */
dim_t ibox;
dim_t ncol;
dim_t nbolo; /* Total number of bolometers */
double *dat; /* Pointer to start of input data values */
double *din; /* Pointer to input data array for bolo/time */
double *ipi; /* Pointer to output I array */
double *ipq; /* Pointer to output Q array */
double *ipu; /* Pointer to output U array */
double *ipv; /* Pointer to output weights array */
double *pm;
double *ps;
double angle; /* Phase angle for FFT */
double angrot; /* Angle from focal plane X axis to fixed analyser */
double c1;
double c2;
double c4;
double c8;
double cosval; /* Cos of angrot */
double fit;
double fx[2]; /* Focal plane X coord at bolometer and northern point*/
double fy[2]; /* Focal plane Y coord at bolometer and northern point*/
double gx; /* GRID X coord at bolometer */
double gy; /* GRID Y coord at bolometer */
double matrix[ NPAR*NPAR ];
double paoff; /* WPLATE value corresponding to POL_ANG=0.0 */
double phi; /* Angle from fixed analyser to effective analyser */
double res;
double s1; /* Sum of weighted cosine terms */
double s2; /* Sum of weighted sine terms */
double s4;
double s8;
double sinval; /* Sin of angrot */
double solution[ NPAR ];
double sum1; /* Sum of squared residuals */
double sums[NSUM]; /* Sum of bolometer values */
double sx[2]; /* SKY X coord at bolometer and northern point*/
double sy[2]; /* SKY Y coord at bolometer and northern point*/
double tr_angle;
double twophi;
double vector[ NPAR ];
double wplate; /* Angle from fixed analyser to have-wave plate */
gsl_matrix_view gsl_m;
gsl_vector_view gsl_b;
gsl_vector_view gsl_x;
int ipolcrd; /* Reference direction for pol_ang */
int nsum1;
int pasign; /* +1 or -1 indicating sense of POL_ANG value */
smfFitQUIJobData *pdata; /* Pointer to job data */
smf_qual_t *qin; /* Pointer to input quality array for bolo/time */
smf_qual_t *qua; /* Pointer to start of input quality values */
/* Check inherited status */
if( *status != SAI__OK ) return;
/* Begin an AST context */
astBegin;
/* Create views of the matrix and vector buffers that can be used by GSL. */
gsl_m = gsl_matrix_view_array( matrix, NPAR, NPAR );
gsl_b = gsl_vector_view_array( vector, NPAR );
gsl_x = gsl_vector_view_array( solution, NPAR );
/* Get a pointer to the job data, and then extract its contents into a
set of local variables. */
pdata = (smfFitQUIJobData *) job_data;
b1 = pdata->b1;
b2 = pdata->b2;
nbolo = pdata->nbolo;
ncol = pdata->ncol;
dat = pdata->dat + b1;
qua = pdata->qua + b1;
allstates = pdata->allstates;
ipi = pdata->ipi ? pdata->ipi + b1 : NULL;
ipq = pdata->ipq + b1;
ipu = pdata->ipu + b1;
ipv = pdata->ipv + b1;
ipolcrd = pdata->ipolcrd;
pasign = pdata->pasign;
paoff = pdata->paoff;
angrot = pdata->angrot;
box_size = pdata->box_size;
wcs = pdata->wcs;
if( wcs ) {
astLock( wcs, 0 );
/* Get the mapping from GRID to SKY. */
g2s = astSimplify( astGetMapping( wcs, AST__BASE, AST__CURRENT ));
/* Get the mapping from SKY to focal plane (x,y) (the index of the FPLANE
Frame is fixed at 3 by file sc2ast.c). */
s2f = astSimplify( astGetMapping( wcs, AST__CURRENT, 3 ) );
} else{
g2s = s2f = NULL;
}
/* Check we have something to do. */
if( b1 < nbolo && *status == SAI__OK ) {
/* Loop round all bolometers to be processed by this thread. */
for( ibolo = b1; ibolo <= b2; ibolo++,qua++,dat++ ) {
/* If the returned Stokes parameters are to be with respect to Tracking
North, get the angle from tracking north at the current bolometer to
focal plane Y, measured positive in the sense of rotation from focal
plane Y to focal plane X (note this angle may change across the focal
plane due to focal plane distortion). Otherwise, use zero. */
if( pdata->wcs ) {
/* Get the grid coords of the current bolometer, and transform them to SKY
coordinates using the FrameSet. */
gx = ibolo % ncol + 1;
gy = ibolo / ncol + 1;
astTran2( g2s, 1, &gx, &gy, 1, sx, sy );
/* Increment the sky position slightly to the north. */
sx[ 1 ] = sx[ 0 ];
sy[ 1 ] = sy[ 0 ] + 1.0E-6;
/* Transform both sky positions into focal plane coords. */
astTran2( s2f, 2, sx, sy, 1, fx, fy );
/* Get the angle from north to focal plane Y, measured positive in the
sense of rotation from focal plane Y to focal plane X. */
if( fx[0] != VAL__BADD && fy[0] != VAL__BADD &&
fx[1] != VAL__BADD && fy[1] != VAL__BADD ) {
tr_angle = atan2( fx[0] - fx[1], fy[1] - fy[0] );
} else {
tr_angle = VAL__BADD;
}
} else {
tr_angle = 0.0;
}
/* If the whole bolometer is bad, put bad values into the outputs. */
if( *qua & SMF__Q_BADB || tr_angle == VAL__BADD ) {
if( ipi ) *(ipi++) = VAL__BADD;
*(ipq++) = VAL__BADD;
*(ipu++) = VAL__BADD;
*(ipv++) = VAL__BADD;
/* If the bolometer is good, calculate and store the output i, q and u
values. */
} else {
/* Initialise pointers to the first input data value, quality value and
state info to be used in the current fitting box. */
din = dat;
qin = qua;
state = allstates;
/* Form the sums needed to calculate the best fit Q, U and I. This
involves looping over all input samples that fall within the fitting box
centred on the current output sample. The 44 sums are stored in the
"sums" array. Initialise it to hold zeros. */
memset( sums, 0, NSUM*sizeof(*sums) );
for( ibox = 0; ibox < box_size; ibox++,state++ ) {
/* Get the POL_ANG value for this time slice. */
angle = state->pol_ang;
/* Check the input sample has not been flagged during cleaning and is
not bad. */
if( !( *qin & SMF__Q_FIT ) && *din != VAL__BADD &&
angle != VAL__BADD ) {
/* Following SUN/223 (section "Single-beam polarimetry"/"The Polarimeter"),
get the angle from the fixed analyser to the half-waveplate axis, in radians.
Positive rotation is from focal plane axis 1 (x) to focal plane axis 2 (y).
Not sure about the sign of tcs_az/tr_ang at the moment so do not use them
yet. */
wplate = 0.0;
if( ipolcrd == 0 ) {
wplate = pasign*angle + paoff;
} else if( *status == SAI__OK ) {
*status = SAI__ERROR;
errRepf( "", "smf_fit_qui: currently only POL_CRD = "
"FPLANE is supported.", status );
}
/*
if( ipolcrd == 1 ) {
wplate += state->tcs_az_ang;
} else if( ipolcrd == 2 ) {
wplate += state->tcs_tr_ang;
}
*/
/* Get the angle from the fixed analyser to the effective analyser
position (see SUN/223 again). The effective analyser angle rotates twice
as fast as the half-wave plate which is why there is a factor of 2 here. */
phi = 2*wplate;
twophi = 2*phi;
/* Form the trig values needed for the sums. */
s8 = sin( 2*twophi );
c8 = cos( 2*twophi );
s4 = sin( twophi );
c4 = cos( twophi );
s2 = sin( phi );
c2 = cos( phi );
s1 = sin( wplate );
c1 = cos( wplate );
/* Update the sums. The order of the following lines define the index
within "sums" at which each sum is stored. */
ps = sums;
*(ps++) += s4*s4;
*(ps++) += s4*c4;
*(ps++) += s4*s2;
*(ps++) += s4*c2;
*(ps++) += s4*s1;
*(ps++) += s4*c1;
*(ps++) += s4*ibox;
*(ps++) += s4;
*(ps++) += s4*(*din);
*(ps++) += s2*c4;
*(ps++) += s2*s2;
*(ps++) += s2*c2;
*(ps++) += s2*s1;
*(ps++) += s2*c1;
*(ps++) += s2*ibox;
*(ps++) += s2;
*(ps++) += s2*(*din);
*(ps++) += s1*c4;
*(ps++) += s1*c2;
*(ps++) += s1*s1;
*(ps++) += s1*c1;
*(ps++) += s1*ibox;
*(ps++) += s1;
*(ps++) += s1*(*din);
*(ps++) += c4*c4;
*(ps++) += c4*c2;
*(ps++) += c4*c1;
*(ps++) += c4*ibox;
*(ps++) += c4;
*(ps++) += c4*(*din);
*(ps++) += c2*c2;
*(ps++) += c2*c1;
*(ps++) += c2*ibox;
*(ps++) += c2;
*(ps++) += c2*(*din);
*(ps++) += c1*c1;
*(ps++) += c1*ibox;
*(ps++) += c1;
*(ps++) += c1*(*din);
*(ps++) += ibox*ibox;
*(ps++) += ibox;
*(ps++) += ibox*(*din);
*(ps++) += 1.0;
*(ps++) += *din;
*(ps++) += s4*s8;
*(ps++) += s4*c8;
*(ps++) += s2*s8;
*(ps++) += s2*c8;
*(ps++) += s1*s8;
*(ps++) += s1*c8;
*(ps++) += s8*c4;
*(ps++) += s8*c2;
*(ps++) += s8*c1;
*(ps++) += s8*ibox;
*(ps++) += s8;
*(ps++) += s8*(*din);
*(ps++) += s8*s8;
*(ps++) += s8*c8;
*(ps++) += c4*c8;
*(ps++) += c2*c8;
*(ps++) += c1*c8;
*(ps++) += c8*ibox;
*(ps++) += c8;
*(ps++) += c8*(*din);
*(ps++) += c8*c8;
}
din += nbolo;
qin += nbolo;
}
/* Now find the parameters of the best fit. First check that there were
sufficient good samples in the fitting box. */
if( sums[42] > 0.8*box_size ) {
/* Copy the sums to the correct elements of the 10x10 matrix. */
pm = matrix;
*(pm++) = sums[ 0 ];
*(pm++) = sums[ 1 ];
*(pm++) = sums[ 2 ];
*(pm++) = sums[ 3 ];
*(pm++) = sums[ 4 ];
*(pm++) = sums[ 5 ];
*(pm++) = sums[ 6 ];
*(pm++) = sums[ 7 ];
*(pm++) = sums[ 44 ];
*(pm++) = sums[ 45 ];
*(pm++) = sums[ 1 ];
*(pm++) = sums[ 24 ];
*(pm++) = sums[ 9 ];
*(pm++) = sums[ 25 ];
*(pm++) = sums[ 17 ];
*(pm++) = sums[ 26 ];
*(pm++) = sums[ 27 ];
*(pm++) = sums[ 28 ];
*(pm++) = sums[ 50 ];
*(pm++) = sums[ 58 ];
*(pm++) = sums[ 2 ];
*(pm++) = sums[ 9 ];
*(pm++) = sums[ 10 ];
*(pm++) = sums[ 11 ];
*(pm++) = sums[ 12 ];
*(pm++) = sums[ 13 ];
*(pm++) = sums[ 14 ];
*(pm++) = sums[ 15 ];
*(pm++) = sums[ 46 ];
*(pm++) = sums[ 47 ];
*(pm++) = sums[ 3 ];
*(pm++) = sums[ 25 ];
*(pm++) = sums[ 11 ];
*(pm++) = sums[ 30 ];
*(pm++) = sums[ 18 ];
*(pm++) = sums[ 31 ];
*(pm++) = sums[ 32 ];
*(pm++) = sums[ 33 ];
*(pm++) = sums[ 51 ];
*(pm++) = sums[ 59 ];
*(pm++) = sums[ 4 ];
*(pm++) = sums[ 17 ];
*(pm++) = sums[ 12 ];
*(pm++) = sums[ 18 ];
*(pm++) = sums[ 19 ];
*(pm++) = sums[ 20 ];
*(pm++) = sums[ 21 ];
*(pm++) = sums[ 22 ];
*(pm++) = sums[ 48 ];
*(pm++) = sums[ 49 ];
*(pm++) = sums[ 5 ];
*(pm++) = sums[ 26 ];
*(pm++) = sums[ 13 ];
*(pm++) = sums[ 31 ];
*(pm++) = sums[ 20 ];
*(pm++) = sums[ 35 ];
*(pm++) = sums[ 36 ];
*(pm++) = sums[ 37 ];
*(pm++) = sums[ 52 ];
*(pm++) = sums[ 60 ];
*(pm++) = sums[ 6 ];
*(pm++) = sums[ 27 ];
*(pm++) = sums[ 14 ];
*(pm++) = sums[ 32 ];
*(pm++) = sums[ 21 ];
*(pm++) = sums[ 36 ];
*(pm++) = sums[ 39 ];
*(pm++) = sums[ 40 ];
*(pm++) = sums[ 53 ];
*(pm++) = sums[ 61 ];
*(pm++) = sums[ 7 ];
*(pm++) = sums[ 28 ];
*(pm++) = sums[ 15 ];
*(pm++) = sums[ 33 ];
*(pm++) = sums[ 22 ];
*(pm++) = sums[ 37 ];
*(pm++) = sums[ 40 ];
*(pm++) = sums[ 42 ];
*(pm++) = sums[ 54 ];
*(pm++) = sums[ 62 ];
*(pm++) = sums[ 44 ];
*(pm++) = sums[ 50 ];
*(pm++) = sums[ 46 ];
*(pm++) = sums[ 51 ];
*(pm++) = sums[ 48 ];
*(pm++) = sums[ 52 ];
*(pm++) = sums[ 53 ];
*(pm++) = sums[ 54 ];
*(pm++) = sums[ 56 ];
*(pm++) = sums[ 57 ];
*(pm++) = sums[ 45 ];
*(pm++) = sums[ 58 ];
*(pm++) = sums[ 47 ];
*(pm++) = sums[ 59 ];
*(pm++) = sums[ 49 ];
*(pm++) = sums[ 60 ];
*(pm++) = sums[ 61 ];
*(pm++) = sums[ 62 ];
*(pm++) = sums[ 57 ];
*(pm++) = sums[ 64 ];
/* Copy the remaining sums to the correct elements of the 8 vector. */
pm = vector;
*(pm++) = sums[ 8 ];
*(pm++) = sums[ 29 ];
*(pm++) = sums[ 16 ];
*(pm++) = sums[ 34 ];
*(pm++) = sums[ 23 ];
*(pm++) = sums[ 38 ];
*(pm++) = sums[ 41 ];
*(pm++) = sums[ 43 ];
*(pm++) = sums[ 55 ];
*(pm++) = sums[ 63 ];
/* Find the solution to the 10x10 set of linear equations. The matrix is
symmetric and positive-definite so use Cholesky decomposition. */
memset( solution, 0, NPAR*sizeof(*solution) );
gsl_linalg_cholesky_decomp( &gsl_m.matrix );
gsl_linalg_cholesky_solve( &gsl_m.matrix, &gsl_b.vector,
&gsl_x.vector );
/* Modify Q and U so they use the requested reference direction, and store in
the output arrays. */
cosval = cos( 2*( angrot - tr_angle ) );
sinval = sin( 2*( angrot - tr_angle ) );
*(ipq++) = 2*( -solution[ 1 ]*cosval + solution[ 0 ]*sinval );
*(ipu++) = 2*( -solution[ 1 ]*sinval - solution[ 0 ]*cosval );
/* Store the correspoinding I value. */
if( ipi ) *(ipi++) = solution[ 6 ]*box_size + 2*solution[ 7 ];
/* Loop over the data again in the same way to calculate the variance of the
residuals between the above fit and the supplied data. */
din = dat;
qin = qua;
state = allstates;
sum1 = 0.0;
nsum1 = 0;
for( ibox = 0; ibox < box_size; ibox++,state++ ) {
angle = state->pol_ang;
if( !( *qin & SMF__Q_FIT ) && *din != VAL__BADD &&
angle != VAL__BADD ) {
wplate = pasign*angle + paoff;
/*
if( ipolcrd == 1 ) {
wplate += state->tcs_az_ang;
} else if( ipolcrd == 2 ) {
wplate += state->tcs_tr_ang;
}
*/
phi = 2*wplate;
twophi = 2*phi;
s8 = sin( 2*twophi );
c8 = cos( 2*twophi );
s4 = sin( twophi );
c4 = cos( twophi );
s2 = sin( phi );
c2 = cos( phi );
s1 = sin( wplate );
c1 = cos( wplate );
fit = solution[0]*s4 +
solution[1]*c4 +
solution[2]*s2 +
solution[3]*c2 +
solution[4]*s1 +
solution[5]*c1 +
solution[6]*ibox +
solution[7] +
solution[8]*s8 +
solution[9]*c8;
res = *din - fit;
sum1 += res*res;
nsum1++;
}
din += nbolo;
qin += nbolo;
}
/* Calculate the variance of the residuals, and then scale it to get the
notional variance for the returned Q,. U and I values. The scaling
factor is determined emprically to get reasonable agreement between these
notional variances and the noise actually seen in the Q and U values
for 10 test observations. The reason for storing these as Q/U variances
rather than as a weights component in the SMURF extension is so that
makemap can pick them up easily and use them to initialise the NOI
model, which is used for weighting the bolometer data when forming the
COM model on the first iteration. */
*(ipv++) = 0.0253*sum1/nsum1;
/* Store bad values if there were too few good samples in the fitting
box. */
} else {
if( ipi ) *(ipi++) = VAL__BADD;
*(ipq++) = VAL__BADD;
*(ipu++) = VAL__BADD;
*(ipv++) = VAL__BADD;
}
}
}
}
if( wcs ) {
g2s = astAnnul( g2s );
s2f = astAnnul( s2f );
astUnlock( wcs, 1 );
}
/* End the AST context */
astEnd;
}
