orbit.c File Reference

Extract AIRS/Aqua orbit data. More...

#include "libairs.h"

Go to the source code of this file.

Functions
int	main (int argc, char *argv[])

Detailed Description

Extract AIRS/Aqua orbit data.

Definition in file orbit.c.

Function Documentation

main()

int main	(	int	argc,
		char *	argv[]
	)

Definition at line 28 of file orbit.c.

                {
 
  static airs_rad_gran_t airs_rad_gran;
 
  FILE *out;
 
  /* Check arguments... */
  if (argc < 3)
    ERRMSG
      ("Give parameters: <orbit.tab> <airs_l1b_file> [ <airs_l1b_file2> ... ]");
 
  /* Create file... */
  printf("Write orbit data: %s\n", argv[1]);
  if (!(out = fopen(argv[1], "w")))
    ERRMSG("Cannot create file!");
 
  /* Write header... */
  fprintf(out,
          "# $1 = time (seconds since 01-JAN-2000, 00:00 UTC)\n"
          "# $2 = satellite longitude [deg]\n"
          "# $3 = satellite latitude [deg]\n"
          "# $4 = footprint longitude [deg]\n"
          "# $5 = footprint latitude [deg]\n");
 
  /* Loop over files... */
  for (int i = 2; i < argc; i++) {
 
    /* Read AIRS data... */
    printf("Read AIRS Level-1B data file: %s\n", argv[i]);
    airs_rad_rdr(argv[i], &airs_rad_gran);
 
    /* Write data... */
    for (int track = 0; track < AIRS_RAD_GEOTRACK; track++) {
      fprintf(out, "\n");
      for (int xtrack = 0; xtrack < AIRS_RAD_GEOXTRACK; xtrack++)
        fprintf(out, "%.2f %g %g %g %g\n",
                airs_rad_gran.Time[track][xtrack] - 220838400,
                airs_rad_gran.sat_lon[track],
                airs_rad_gran.sat_lat[track],
                airs_rad_gran.Longitude[track][xtrack],
                airs_rad_gran.Latitude[track][xtrack]);
    }
  }
 
  /* Close file... */
  fclose(out);
 
  return EXIT_SUCCESS;
}