AnglePair
sky_coord::getGalactic() const
{
double l, b;
double ra, dec;
AnglePair gal;
ra = angle1.getRadians();
dec= angle2.getRadians();
slaEqgal (ra, dec, &l, &b);
gal.angle1.setRadians(l);
gal.angle2.setRadians(b);
return gal;
}
void fill_psrfits_struct(int numwapps, int numbits, struct HEADERP *h,
struct wappinfo *w, struct psrfits *pf)
{
int slen, ii;
char *cptr;
pf->filenum = 0; // Crucial for initialization
pf->hdr.nsblk = (int) (1.0 / w->dt); // _might_ be a problem...
// Now set values for our hdrinfo structure
strcpy(pf->hdr.telescope, "Arecibo");
cptr = get_hdr_string(h, "obs_type", &slen);
if (strncmp("PULSAR_SEARCH", cptr, slen) == 0) {
strcpy(pf->hdr.obs_mode, "SEARCH");
} else {
printf("Error: Wapp data is not in search format!\n\n");
exit(1);
}
strcpy(pf->hdr.backend, "WAPP");
cptr = get_hdr_string(h, "frontend", &slen);
if(cptr != NULL)
strncpy(pf->hdr.frontend, cptr, slen);
else
strncpy(pf->hdr.frontend, "alfa", 4);
cptr = get_hdr_string(h, "observers", &slen);
strncpy(pf->hdr.observer, cptr, slen);
cptr = get_hdr_string(h, "project_id", &slen);
strncpy(pf->hdr.project_id, cptr, slen);
cptr = get_hdr_string(h, "src_name", &slen);
strncpy(pf->hdr.source, cptr, slen);
strcpy(pf->hdr.date_obs, w->date_obs);
pf->hdr.scanlen = get_hdr_double(h, "obs_time");
strcpy(pf->hdr.poln_type, "LIN"); // set based on known receivers
if (get_hdr_int(h, "sum")) {
strcpy(pf->hdr.poln_order, "AA+BB");
pf->hdr.summed_polns = 1;
} else if (w->numifs == 1) {
strcpy(pf->hdr.poln_order, "AA");
pf->hdr.summed_polns = 0;
}
strcpy(pf->hdr.track_mode, "TRACK"); // Potentially not-true?
strcpy(pf->hdr.cal_mode, "OFF"); // Potentially not-true?
strcpy(pf->hdr.feed_mode, "FA"); // check this...
pf->hdr.beamnum = 0;
if (get_hdr_int(h, "isalfa"))
pf->hdr.beamnum = w->beamnum;
pf->hdr.dt = w->dt;
pf->hdr.fctr = w->fctr + 0.5 * (numwapps - 1.0) * w->BW;
pf->hdr.BW = w->BW * numwapps;
pf->hdr.beam_FWHM = beam_FWHM(pf->hdr.fctr, 300.0);
pf->hdr.nchan = w->numchans * numwapps;
pf->hdr.orig_nchan = w->numchans * numwapps;
pf->hdr.orig_df = pf->hdr.df = pf->hdr.BW / pf->hdr.nchan;
pf->hdr.nbits = numbits;
pf->hdr.npol = w->numifs;
pf->hdr.MJD_epoch = w->MJD_epoch;
pf->hdr.start_day = (int) (w->MJD_epoch);
pf->hdr.start_sec = (w->MJD_epoch - pf->hdr.start_day) * 86400.0;
pf->hdr.scan_number = get_hdr_int(h, "scan_number");
pf->hdr.ra2000 = w->ra;
dec2hms(pf->hdr.ra_str, pf->hdr.ra2000 / 15.0, 0);
pf->hdr.dec2000 = w->dec;
dec2hms(pf->hdr.dec_str, pf->hdr.dec2000, 1);
pf->hdr.azimuth = get_hdr_double(h, "start_az");
pf->hdr.zenith_ang = get_hdr_double(h, "start_za");
pf->hdr.rcvr_polns = 2;
pf->hdr.offset_subint = 0;
pf->hdr.onlyI = 0;
pf->hdr.ds_time_fact = 1;
pf->hdr.ds_freq_fact = 1;
pf->hdr.chan_dm = 0.0;
pf->hdr.fd_hand = pf->hdr.be_phase = 0; // This is almost certainly not correct
pf->hdr.fd_sang = pf->hdr.fd_xyph = 0.0; // This is almost certainly not correct
pf->hdr.feed_angle = 0.0; // This is almost certainly not correct
pf->hdr.cal_freq = pf->hdr.cal_dcyc = pf->hdr.cal_phs = 0.0; // ditto
// Now set values for our subint structure
pf->sub.tel_az = get_hdr_double(h, "start_az");
pf->sub.tel_zen = get_hdr_double(h, "start_za");
pf->sub.lst = get_hdr_double(h, "start_lst");
pf->hdr.start_lst = pf->sub.lst;
pf->sub.tsubint = pf->hdr.nsblk * pf->hdr.dt;
pf->sub.ra = pf->hdr.ra2000;
pf->sub.dec = pf->hdr.dec2000;
pf->sub.offs = 0.5 * pf->sub.tsubint;
slaEqgal(pf->hdr.ra2000 * DEGTORAD, pf->hdr.dec2000 * DEGTORAD,
&pf->sub.glon, &pf->sub.glat);
pf->sub.glon *= RADTODEG;
pf->sub.glat *= RADTODEG;
// The following three are unknown or hard to get, I think (SMR)
pf->sub.feed_ang = 0.0;
pf->sub.pos_ang = 0.0;
pf->sub.par_ang = 0.0;
pf->sub.bytes_per_subint = (pf->hdr.nbits * pf->hdr.nchan *
pf->hdr.npol * pf->hdr.nsblk) / 8;
pf->sub.FITS_typecode = TBYTE; // 11 = byte
// Create and initialize the subint arrays
pf->sub.dat_freqs = gen_fvect(pf->hdr.nchan);
pf->sub.dat_weights = gen_fvect(pf->hdr.nchan);
for (ii = 0; ii < pf->hdr.nchan; ii++) {
pf->sub.dat_freqs[ii] = w->lofreq + ii * pf->hdr.df;
pf->sub.dat_weights[ii] = 1.0;
}
// The following are re-set to try to preserve the band shape later
pf->sub.dat_offsets = gen_fvect(pf->hdr.nchan * pf->hdr.npol);
pf->sub.dat_scales = gen_fvect(pf->hdr.nchan * pf->hdr.npol);
for (ii = 0; ii < pf->hdr.nchan * pf->hdr.npol; ii++) {
pf->sub.dat_offsets[ii] = 0.0;
pf->sub.dat_scales[ii] = 1.0;
}
// This is the raw data block that will be updated
// for each row of the PSRFITS file
pf->sub.data = gen_bvect(pf->sub.bytes_per_subint);
}
int main(int argc, char *argv[]) {
int ii;
double dtmp;
struct psrfits pf;
char user_input[256];
char *rval = 0;
char input_pipe[256];
int nbit_input=1;
// Only set the basefilename and not "filename"
// Also, fptr will be set by psrfits_create_searchmode()
pf.filenum = 0; // This is the crucial one to set to initialize things
pf.rows_per_file = 200; // I assume this is a max subint issue
// Need to set this based on PSRFITS_MAXFILELEN
fprintf(stdout,"==================================================================================\n");
fprintf(stdout,"|| MWA-PSRFITS Generator (v0.1) - based on the Ransom and Demorest psrfits_utils ||\n");
fprintf(stdout,"==================================================================================\n");
strcpy(input_pipe, "/tmp/mk_psrfits_in");
fprintf(stdout,"Name of input data pipe [%s]:",input_pipe);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strlen(rval) != 1) {
strcpy(input_pipe, strtok(rval,"\n"));
}
if(mkfifo(input_pipe,0666) != 0) {
perror("Failed to create data pipe");
if (errno == EEXIST) {
fprintf(stderr,"pipe %s already exists ... choose a unique name or delete this pipe (if you are sure noone else is using it).",input_pipe);
exit(0);
}
}
else {
fprintf(stdout,"Streaming input ... will use the pipe (%s) as input. Please cat the input data to this pipe\n",input_pipe);
}
fprintf(stdout,"Input format (1=8b) [%d]:",nbit_input);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
nbit_input = atoi(rval);
}
if (nbit_input != 1) {
fprintf(stderr,"Invalid nbit input\n");
exit(0);
}
strcpy(pf.basefilename, "test_psrfits");
fprintf(stdout,"Basename of output file [%s]:",pf.basefilename);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strlen(rval) != 1) {
strcpy(pf.basefilename, strtok(rval,"\n"));
}
// Now set values for our hdrinfo structure
strcpy(pf.hdr.obs_mode,"SEARCH");
fprintf(stdout,"OBS_MODE [%s]:",pf.hdr.obs_mode);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strlen(rval) != 1) {
strcpy(pf.hdr.obs_mode, strtok(rval,"\n"));
}
pf.hdr.scanlen = 5.0; // in sec
fprintf(stdout,"Length of scan in this file [%lf]:",pf.hdr.scanlen);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.scanlen = atof(rval);
}
strcpy(pf.hdr.observer, "MWA User");
fprintf(stdout,"Observer [%s]:",pf.hdr.observer);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strlen(rval) != 1) {
strcpy(pf.hdr.observer, strtok(rval,"\n"));
}
strcpy(pf.hdr.telescope, "MWA");
fprintf(stdout,"Telescope [%s]:",pf.hdr.telescope);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strlen(rval) != 1) {
strcpy(pf.hdr.telescope, strtok(rval,"\n"));
}
strcpy(pf.hdr.source, "<vcs_obs>");
fprintf(stdout,"Source [%s]:",pf.hdr.source);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strlen(rval) != 1) {
strcpy(pf.hdr.source, strtok(rval,"\n"));
}
strcpy(pf.hdr.frontend, "MWA-RECVR");
fprintf(stdout,"Front End [%s]:",pf.hdr.frontend);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strlen(rval) != 1) {
strcpy(pf.hdr.frontend, strtok(rval,"\n"));
}
strcpy(pf.hdr.backend, "MWA-VCS");
fprintf(stdout,"Back End [%s]:",pf.hdr.backend);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strlen(rval) != 1) {
strcpy(pf.hdr.backend, strtok(rval,"\n"));
}
strcpy(pf.hdr.project_id, "MWA-D0004");
fprintf(stdout,"project_id [%s]:",pf.hdr.project_id);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strlen(rval) != 1) {
strcpy(pf.hdr.project_id, strtok(rval,"\n"));
}
strcpy(pf.hdr.date_obs, "2010-01-01T05:15:30.000");
fprintf(stdout,"Date Obs [%s]:",pf.hdr.date_obs);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strlen(rval) != 1) {
strcpy(pf.hdr.date_obs, strtok(rval,"\n"));
}
strcpy(pf.hdr.poln_type, "LIN");
strcpy(pf.hdr.track_mode, "TRACK");
strcpy(pf.hdr.cal_mode, "OFF");
strcpy(pf.hdr.feed_mode, "FA");
pf.hdr.dt = 0.00010; // sample rate (s)
fprintf(stdout,"Sample Rate (s) [%lf]:",pf.hdr.dt);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.dt = atof(rval);
}
pf.hdr.fctr = 150.0; // frequency (MHz)
fprintf(stdout,"Centre Frequency (MHz) [%lf]:",pf.hdr.fctr);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.fctr = atof(rval);
}
pf.hdr.BW = 1.28;
fprintf(stdout,"Bandwidth (MHz) [%lf]:",pf.hdr.BW);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.BW = atof(rval);
}
pf.hdr.ra2000 = 302.0876876;
fprintf(stdout,"RA (2000) (deg) [%lf]:",pf.hdr.ra2000);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.ra2000 = atof(rval);
}
dec2hms(pf.hdr.ra_str, pf.hdr.ra2000/15.0, 0);
pf.hdr.dec2000 = -3.456987698;
fprintf(stdout,"Dec (2000) (deg) [%lf]:",pf.hdr.dec2000);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.dec2000 = atof(rval);
}
dec2hms(pf.hdr.dec_str, pf.hdr.dec2000, 1);
pf.hdr.azimuth = 123.123;
fprintf(stdout,"Azimuth (deg) [%lf]:",pf.hdr.azimuth);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.azimuth = atof(rval);
}
pf.hdr.zenith_ang = 23.0;
fprintf(stdout,"Zenith Angle (deg) [%lf]:",pf.hdr.zenith_ang);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.zenith_ang = atof(rval);
}
pf.hdr.beam_FWHM = 0.25;
fprintf(stdout,"Beam FWHM (deg) [%lf]:",pf.hdr.beam_FWHM);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.zenith_ang = atof(rval);
}
pf.hdr.start_lst = 10000.0;
fprintf(stdout,"Seconds past 00h LST [%lf]:",pf.hdr.start_lst);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.start_lst = atof(rval);
}
pf.hdr.start_sec = 25000.82736876;
fprintf(stdout,"Seconds past 00h UTC [%lf]:",pf.hdr.start_sec);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.start_sec = atof(rval);
}
pf.hdr.start_day = 55000;
fprintf(stdout,"Start MJD (whole day) [%d]:",pf.hdr.start_day);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.start_day = atoi(rval);
}
pf.hdr.scan_number = 3;
fprintf(stdout,"Scan Number [%d]:",pf.hdr.scan_number);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.scan_number = atoi(rval);
}
pf.hdr.rcvr_polns = 2;
fprintf(stdout,"Receiver Polarisation [%d]:",pf.hdr.rcvr_polns);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.rcvr_polns = atoi(rval);
}
pf.hdr.summed_polns = 1;
fprintf(stdout,"Summed Polarisations? [1/0] [%d]:",pf.hdr.summed_polns);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.summed_polns = atoi(rval);
}
pf.hdr.offset_subint = 0;
fprintf(stdout,"Offset Subint [%d]:",pf.hdr.offset_subint);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.summed_polns = atoi(rval);
}
pf.hdr.nchan = (pf.hdr.BW*100);
fprintf(stdout,"Number of Channels [%d]:",pf.hdr.nchan);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.nchan = atoi(rval);
}
pf.hdr.orig_nchan = pf.hdr.nchan;
pf.hdr.orig_df = pf.hdr.df = pf.hdr.BW / pf.hdr.nchan;
pf.hdr.nbits = 8;
fprintf(stdout,"Number of bits per sample [%d]:",pf.hdr.nbits);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.nbits = atoi(rval);
}
if (pf.hdr.summed_polns) {
pf.hdr.npol = 1;
}
else {
pf.hdr.npol = pf.hdr.rcvr_polns;
}
pf.hdr.nsblk = 10000;
fprintf(stdout,"Number of spectra per row [%d]:",pf.hdr.nsblk);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
pf.hdr.nsblk = atoi(rval);
}
pf.hdr.MJD_epoch = pf.hdr.start_day + (pf.hdr.start_sec/86400.0);
fprintf(stdout,"Start MJD [%Lf]:",pf.hdr.MJD_epoch);
rval = fgets(user_input,256,stdin);
if (rval == NULL) {
perror("Failed to parse");
exit(0);
}
if (strncmp(rval,"\n",1) != 0) {
double temp = atof(rval);
pf.hdr.MJD_epoch = (long double) temp;
}
pf.hdr.ds_freq_fact = 1;
pf.hdr.ds_time_fact = 1;
// some things that we are unlikely to change
//
pf.hdr.fd_hand = 0;
pf.hdr.fd_sang = 0.0;
pf.hdr.fd_xyph = 0.0;
pf.hdr.be_phase = 0.0;
pf.hdr.chan_dm = 0.0;
// Now set values for our subint structure
pf.tot_rows = 0;
pf.sub.tsubint = pf.hdr.nsblk * pf.hdr.dt;
pf.sub.offs = (pf.tot_rows + 0.5) * pf.sub.tsubint;
pf.sub.lst = pf.hdr.start_lst;
pf.sub.ra = pf.hdr.ra2000;
pf.sub.dec = pf.hdr.dec2000;
slaEqgal(pf.hdr.ra2000*DEGTORAD, pf.hdr.dec2000*DEGTORAD,
&pf.sub.glon, &pf.sub.glat);
pf.sub.glon *= RADTODEG;
pf.sub.glat *= RADTODEG;
pf.sub.feed_ang = 0.0;
pf.sub.pos_ang = 0.0;
pf.sub.par_ang = 0.0;
pf.sub.tel_az = pf.hdr.azimuth;
pf.sub.tel_zen = pf.hdr.zenith_ang;
pf.sub.bytes_per_subint = (pf.hdr.nbits * pf.hdr.nchan *
pf.hdr.npol * pf.hdr.nsblk) / 8;
pf.sub.FITS_typecode = TBYTE; // 11 = byte
// Create and initialize the subint arrays
pf.sub.dat_freqs = (float *)malloc(sizeof(float) * pf.hdr.nchan);
pf.sub.dat_weights = (float *)malloc(sizeof(float) * pf.hdr.nchan);
dtmp = pf.hdr.fctr - 0.5 * pf.hdr.BW + 0.5 * pf.hdr.df;
for (ii = 0 ; ii < pf.hdr.nchan ; ii++) {
pf.sub.dat_freqs[ii] = dtmp + ii * pf.hdr.df;
pf.sub.dat_weights[ii] = 1.0;
}
pf.sub.dat_offsets = (float *)malloc(sizeof(float) * pf.hdr.nchan * pf.hdr.npol);
pf.sub.dat_scales = (float *)malloc(sizeof(float) * pf.hdr.nchan * pf.hdr.npol);
for (ii = 0 ; ii < pf.hdr.nchan * pf.hdr.npol ; ii++) {
pf.sub.dat_offsets[ii] = 0.0;
pf.sub.dat_scales[ii] = 1.0;
}
pf.sub.data = (unsigned char *)malloc(pf.sub.bytes_per_subint);
pf.sub.rawdata = pf.sub.data;
// This is what you would update for each time sample (likely just
// adjusting the pointer to point to your data)
//
// We are using a pipe open it
int fp = open(input_pipe, O_RDONLY);
if(fp == -1) {
perror("Could not open the pipe\n");
exit(0);
}
pf.status=0;
// Here is the real data-writing loop
do {
// Update the pf.sub entries here for each subint
// as well as the pf.sub.data pointer
//
size_t readval = readn(fp, pf.sub.data, pf.sub.bytes_per_subint);
if (readval == pf.sub.bytes_per_subint) {
fprintf(stderr,"got %zu of %d\n",readval,pf.sub.bytes_per_subint);
psrfits_write_subint(&pf);
}
else {
fprintf(stderr,"got %zu of %d\n",readval,pf.sub.bytes_per_subint);
perror("Failed to read full allocation from pipe");
break;
}
pf.sub.offs = (pf.tot_rows + 0.5) * pf.sub.tsubint;
pf.sub.lst += pf.sub.tsubint;;
} while (pf.T < pf.hdr.scanlen && !pf.status);
//close the pipe
close(fp);
// Close the last file and cleanup
fits_close_file(pf.fptr, &(pf.status));
free(pf.sub.dat_freqs);
free(pf.sub.dat_weights);
free(pf.sub.dat_offsets);
free(pf.sub.dat_scales);
free(pf.sub.data);
printf("Done. Wrote %d subints (%f sec) in %d files. status = %d\n",
pf.tot_rows, pf.T, pf.filenum, pf.status);
exit(0);
}
// Read a status buffer all of the key observation paramters
void guppi_read_subint_params(char *buf,
struct guppi_params *g,
struct psrfits *p)
{
// Parse packet size, # of packets, etc.
get_lon("PKTIDX", g->packetindex, -1L);
get_int("PKTSIZE", g->packetsize, 0);
get_int("NPKT", g->n_packets, 0);
get_int("NDROP", g->n_dropped, 0);
get_dbl("DROPAVG", g->drop_frac_avg, 0.0);
get_dbl("DROPTOT", g->drop_frac_tot, 0.0);
get_int("BLOCSIZE", g->packets_per_block, 0);
if (g->packetsize>0)
g->packets_per_block /= g->packetsize;
if (g->n_packets>0)
g->drop_frac = (double) g->n_dropped / (double) g->n_packets;
else
g->drop_frac = 0.0;
// Valid obs start time
get_int("STTVALID", g->stt_valid, 0);
// Observation params
get_dbl("AZ", p->sub.tel_az, 0.0);
if (p->sub.tel_az < 0.0) p->sub.tel_az += 360.0;
get_dbl("ZA", p->sub.tel_zen, 0.0);
get_dbl("RA", p->sub.ra, 0.0);
get_dbl("DEC", p->sub.dec, 0.0);
// Backend HW parameters
get_int("ACC_LEN", g->decimation_factor, 0);
get_int("NBITSADC", g->n_bits_adc, 8);
get_int("PFB_OVER", g->pfb_overlap, 4);
// Check fold mode
int fold=0;
if (strstr("PSR", p->hdr.obs_mode)!=NULL) { fold=1; }
if (strstr("CAL", p->hdr.obs_mode)!=NULL) { fold=1; }
// Fold-specifc stuff
if (fold) {
get_dbl("TSUBINT", p->sub.tsubint, 0.0);
get_dbl("OFFS_SUB", p->sub.offs, 0.0);
get_int("NPOLYCO", p->fold.n_polyco_sets, 0);
} else {
int bytes_per_dt = p->hdr.nchan * p->hdr.npol * p->hdr.nbits / 8;
p->sub.offs = p->hdr.dt *
(double)(g->packetindex * g->packetsize / bytes_per_dt)
+ 0.5 * p->sub.tsubint;
p->fold.n_polyco_sets = 0;
}
{ // MJD and LST calcs
int imjd, smjd, lst_secs;
double offs, mjd;
get_current_mjd(&imjd, &smjd, &offs);
mjd = (double) imjd + ((double) smjd + offs) / 86400.0;
get_current_lst(mjd, &lst_secs);
p->sub.lst = (double) lst_secs;
}
// Until we need them...
p->sub.feed_ang = 0.0;
p->sub.pos_ang = 0.0;
p->sub.par_ang = 0.0;
// Galactic coords
slaEqgal(p->sub.ra*DEGTORAD, p->sub.dec*DEGTORAD,
&p->sub.glon, &p->sub.glat);
p->sub.glon *= RADTODEG;
p->sub.glat *= RADTODEG;
}