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/*****************************************************************************
* Johns Hopkins University
* Center For Astrophysical Sciences
* FUSE
*****************************************************************************
*
* Synopsis: cf_screen_bad_pixels (fitsfile *header, long nevents,
* float *x, float *y, unsigned char *location)
*
* Description: Flag photon events in bad-pixel regions.
*
* Arguments: fitsfile *header Input FITS file pointer
* long nevents Number of photon events
* float *x X coordinate array
* float *y Y coordinate array
* unsigned char *location Photon location flag array
*
* Calls: cf_get_potholes
*
* Returns: 0 on success
*
* History: 11/22/05 1.1 wvd Initial coding
*
****************************************************************************/
#include <stdlib.h>
#include "calfuse.h"
/***********************************************************************
*
* Procedure to read pothole locations from the QUAL_CAL file
*
***********************************************************************/
int
cf_get_potholes(fitsfile *header, float **xbad, float **ybad,
float **rxbad, float **rybad)
{
char qualfile[FLEN_VALUE];
int nbad, status=0;
fitsfile *qualfits;
cf_verbose(3, "Entering cf_get_potholes.");
/*
* Read limits of bad-pixel regions from the first extension
* of the QUAL_CAL file.
*/
FITS_movabs_hdu(header, 1, NULL, &status);
FITS_read_key(header, TSTRING, "QUAL_CAL", qualfile, NULL, &status);
cf_verbose(3, "QUAL_CAL = %s", qualfile);
FITS_open_file(&qualfits, cf_cal_file(qualfile), READONLY, &status);
FITS_movabs_hdu(qualfits, 2, NULL, &status);
nbad = cf_read_col(qualfits, TFLOAT, "X", (void **) xbad);
nbad = cf_read_col(qualfits, TFLOAT, "Y", (void **) ybad);
nbad = cf_read_col(qualfits, TFLOAT, "RX", (void **) rxbad);
nbad = cf_read_col(qualfits, TFLOAT, "RY", (void **) rybad);
FITS_close_file(qualfits, &status);
cf_verbose(3, "Exiting cf_get_potholes.");
return nbad;
}
int
cf_screen_bad_pixels (fitsfile *header, long nevents, float *x, float *y,
unsigned char *location)
{
char CF_PRGM_ID[] = "cf_screen_bad_pixels";
char CF_VER_NUM[] = "1.1";
int errflg=0, nbad;
long counter=0, i, j;
float *xbad, *ybad, *rxbad, *rybad, *rx2, *ry2;
cf_error_init(CF_PRGM_ID, CF_VER_NUM, stderr);
cf_timestamp(CF_PRGM_ID, CF_VER_NUM, "Begin Processing");
if ((errflg = cf_proc_check(header, CF_PRGM_ID))) return errflg;
/*
* Read limits of bad-pixel regions from QUAL_CAL file.
*/
nbad = cf_get_potholes(header, &xbad, &ybad, &rxbad, &rybad);
cf_verbose(2, "For first pothole: x = %.0f, y = %.0f, rx = %.0f, ry = %.0f",
xbad[0], ybad[0], rxbad[0], rybad[0]);
/*
* Square the semi-major axes.
*/
for (j = 0; j < nbad; j++) {
rxbad[j] *= rxbad[j];
rybad[j] *= rybad[j];
}
rx2 = rxbad;
ry2 = rybad;
cf_verbose(2, "For first pothole: rx2 = %.0f, ry2 = %.0f", rx2[0], ry2[0]);
/*
* Flag photons in the bad-pixel regions.
*/
for (i = 0; i < nevents; i++) {
for (j = 0; j < nbad; j++) {
if ((x[i] - xbad[j]) * (x[i] - xbad[j]) / rx2[j] +
(y[i] - ybad[j]) * (y[i] - ybad[j]) / ry2[j] < 1.0) {
location[i] = location[i] | LOCATION_BADPX;
counter++;
break;
}
}
}
cf_verbose(2, "Flagged %d pixels as bad", counter);
free(xbad);
free(ybad);
free(rxbad);
free(rybad);
cf_proc_update(header, CF_PRGM_ID, "COMPLETE");
cf_timestamp(CF_PRGM_ID, CF_VER_NUM, "Done processing");
return 0;
}
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