int main(int argc, char *argv[])
{
NcFile at(atpath, NcFile::ReadOnly);
if(!at.is_valid() || at.num_dims() != 3 || at.num_vars() != 4) {
fprintf(stderr, "failed reading file: %s\n", atpath);
return 1;
}
NcVar* data = at.get_var("rhum");
if(!data->is_valid() || data->num_dims() != 3) {
fprintf(stderr, "rhum has incorrect dimensions");
return 1;
}
NcDim* time = data->get_dim(0);
int timecnt = time->size();
float *rhumd = new float[timecnt*LATS*LONS];
data->get(rhumd, timecnt, LATS, LONS);
float rhumdmon[12][LATS][LONS];
for(int i = 0; i<LATS; i++)
for(int j = 0; j<LONS; j++) {
float rhumdmoncnt[12];
for(int k = 0; k<12; k++) {
rhumdmon[k][i][j] = 0;
rhumdmoncnt[k] = 0;
}
for(int k = 0; k<timecnt; k++) {
double v = rhumd[(k*LATS+i)*LONS+j]*.1 + 3276.5;
if(v >= 0 && v <= 100) {
rhumdmon[k%12][i][j] += v;
rhumdmoncnt[k%12]++;
}
}
for(int k = 0; k<12; k++)
rhumdmon[k][i][j] /= rhumdmoncnt[k];
}
delete [] rhumd;
/* use a single byte instead of 2 to save memory,
resolution of 1/5th of a mm/day resolution */
uint8_t rhumbyte[12][LATS][LONS];
for(int i = 0; i<12; i++)
for(int j = 0; j<LATS; j++)
for(int k = 0; k<LONS; k++)
if(isnan(rhumdmon[i][j][k]) || fabs(rhumdmon[i][j][k]) > 100)
rhumbyte[i][j][k] = 255;
else
rhumbyte[i][j][k] = rhumdmon[i][j][k]*2.0;
fwrite(rhumbyte, sizeof rhumbyte, 1, stdout);
return 0;
}
const bool isValid( void ) const
{
return( m_var->is_valid() != 0 );
}
//
// Creates NetCDF product
//
bool NetCDFProduct(MSG_header *PRO_head, MSG_data* PRO_data,
int totalsegs, int *segsindexes,
MSG_header *header, MSG_data *msgdat)
{
struct tm *tmtime;
char NcName[1024];
char reftime[64];
char projname[16];
int wd, hg;
int bpp;
int ncal;
float *cal;
NcVar *ivar;
NcVar *tvar;
NcDim *tdim;
NcDim *ldim;
NcDim *cdim;
NcDim *caldim;
int npix = header[0].image_structure->number_of_columns;
int nlin = header[0].image_structure->number_of_lines;
size_t npixperseg = npix*nlin;
size_t total_size = totalsegs*npixperseg;
MSG_SAMPLE *pixels = new MSG_SAMPLE[total_size];
memset(pixels, 0, total_size*sizeof(MSG_SAMPLE));
size_t pos = 0;
for (int i = 0; i < totalsegs; i ++)
{
if (segsindexes[i] >= 0)
memcpy(pixels+pos, msgdat[segsindexes[i]].image->data,
npixperseg*sizeof(MSG_SAMPLE));
pos += npixperseg;
}
nlin = nlin*totalsegs;
// Manage subarea
if (is_subarea)
{
if (AreaLinStart < 0 ||
AreaLinStart > nlin - AreaNlin ||
AreaNlin > nlin - AreaLinStart)
{
std::cerr << "Wrong Subarea in lines...." << std::endl;
throw;
}
if (AreaPixStart < 0 ||
AreaPixStart > npix - AreaNpix ||
AreaNpix > npix - AreaPixStart)
{
std::cerr << "Wrong Subarea in Pixels...." << std::endl;
throw;
}
size_t newsize = AreaNpix * AreaNlin;
MSG_SAMPLE *newpix = new MSG_SAMPLE[newsize];
memset(newpix, 0, newsize*sizeof(MSG_SAMPLE));
for (int i = 0; i < AreaNlin; i ++)
memcpy(newpix + i * AreaNpix,
pixels + (AreaLinStart + i) * npix + AreaPixStart,
AreaNpix * sizeof(MSG_SAMPLE));
delete [ ] pixels;
pixels = newpix;
total_size = newsize;
}
else
{
AreaNpix = npix;
AreaNlin = nlin;
}
tmtime = PRO_data->prologue->image_acquisition.PlannedAquisitionTime.TrueRepeatCycleStart.get_timestruct( );
t_enum_MSG_spacecraft spc = header[0].segment_id->spacecraft_id;
uint_1 chn = header[0].segment_id->spectral_channel_id;
float sublon = header[0].image_navigation->subsatellite_longitude;
int cfac = header[0].image_navigation->column_scaling_factor;
int lfac = header[0].image_navigation->line_scaling_factor;
int coff = header[0].image_navigation->column_offset;
int loff = header[0].image_navigation->line_offset;
float sh = header[0].image_navigation->satellite_h;
char *channelstring = strdup(MSG_channel_name(spc, chn).c_str( ));
char *channel = chname(channelstring, strlen(channelstring) + 1);
// Build up output NetCDF file name and open it
sprintf( NcName, "%s_%4d%02d%02d_%02d%02d.nc", channel,
tmtime->tm_year + 1900, tmtime->tm_mon + 1, tmtime->tm_mday,
tmtime->tm_hour, tmtime->tm_min );
NcFile ncf ( NcName , NcFile::Replace );
if (! ncf.is_valid()) return false;
// Fill arrays on creation
ncf.set_fill(NcFile::Fill);
// Add Global Attributes
if (! ncf.add_att("Satellite", MSG_spacecraft_name(spc).c_str()))
return false;
sprintf(reftime, "%04d-%02d-%02d %02d:%02d:00 UTC",
tmtime->tm_year + 1900, tmtime->tm_mon + 1, tmtime->tm_mday,
tmtime->tm_hour, tmtime->tm_min);
if (! ncf.add_att("Antenna", "Fixed") ) return false;
if (! ncf.add_att("Receiver", "HIMET") ) return false;
if (! ncf.add_att("Time", reftime) ) return false;
if (! ncf.add_att("Area_Name", "SpaceView" ) ) return false;
sprintf(projname, "GEOS(%3.1f)", sublon);
if (! ncf.add_att("Projection", projname) ) return false;
if (! ncf.add_att("Columns", AreaNpix ) ) return false;
if (! ncf.add_att("Lines", AreaNlin ) ) return false;
if (! ncf.add_att("SampleX", 1.0 ) ) return false;
if (! ncf.add_att("SampleY", 1.0 ) ) return false;
if (! ncf.add_att("AreaStartPix", AreaPixStart ) ) return false;
if (! ncf.add_att("AreaStartLin", AreaLinStart ) ) return false;
if (! ncf.add_att("Column_Scale_Factor", cfac) ) return false;
if (! ncf.add_att("Line_Scale_Factor", lfac) ) return false;
if (! ncf.add_att("Column_Offset", coff) ) return false;
if (! ncf.add_att("Line_Offset", loff) ) return false;
if (! ncf.add_att("Orbit_Radius", sh) ) return false;
if (! ncf.add_att("Longitude", sublon) ) return false;
if (! ncf.add_att("NortPolar", 1) ) return false;
if (! ncf.add_att("NorthSouth", 1) ) return false;
if (! ncf.add_att("title", TITLE) ) return false;
if (! ncf.add_att("Institution", INSTITUTION) ) return false;
if (! ncf.add_att("Type", TYPE) ) return false;
if (! ncf.add_att("Version", HIMET_VERSION) ) return false;
if (! ncf.add_att("Conventions", "COARDS") ) return false;
if (! ncf.add_att("history", "Created from raw data") ) return false;
// Dimensions
wd = AreaNpix;
hg = AreaNlin;
bpp = header[0].image_structure->number_of_bits_per_pixel;
ncal = (int) pow(2.0, bpp);
tdim = ncf.add_dim("time");
if (!tdim->is_valid()) return false;
ldim = ncf.add_dim("line", hg);
if (!ldim->is_valid()) return false;
cdim = ncf.add_dim("column", wd);
if (!cdim->is_valid()) return false;
caldim = ncf.add_dim("calibration", ncal);
if (!caldim->is_valid()) return false;
// Get calibration values
cal = PRO_data->prologue->radiometric_proc.get_calibration((int) chn, bpp);
// Add Calibration values
NcVar *cvar = ncf.add_var("calibration", ncFloat, caldim);
if (!cvar->is_valid()) return false;
cvar->add_att("long_name", "Calibration coefficients");
cvar->add_att("variable", channel);
if (chn > 3 && chn < 12)
cvar->add_att("units", "K");
else
cvar->add_att("units", "mW m^-2 sr^-1 (cm^-1)^-1");
if (!cvar->put(cal, ncal)) return false;
tvar = ncf.add_var("time", ncDouble, tdim);
if (!tvar->is_valid()) return false;
tvar->add_att("long_name", "Time");
tvar->add_att("units", "seconds since 2000-01-01 00:00:00 UTC");
double atime;
time_t ttime;
extern long timezone;
ttime = mktime(tmtime);
atime = ttime - 946684800 - timezone;
if (!tvar->put(&atime, 1)) return false;
ivar = ncf.add_var(channel, ncShort, tdim, ldim, cdim);
if (!ivar->is_valid()) return false;
if (!ivar->add_att("add_offset", 0.0)) return false;
if (!ivar->add_att("scale_factor", 1.0)) return false;
if (!ivar->add_att("chnum", chn)) return false;
// Write output values
if (!ivar->put((const short int *) pixels, 1, hg, wd)) return false;
// Close NetCDF output
(void) ncf.close( );
delete [ ] pixels;
delete [ ] cal;
return( true );
}