map.c

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/*
  This file is part of the GPS Code Collection.
  
  the GPS Code Collections is free software: you can redistribute it
  and/or modify it under the terms of the GNU General Public License
  as published by the Free Software Foundation, either version 3 of
  the License, or (at your option) any later version.
  
  The GPS Code Collection 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 License for more details.
  
  You should have received a copy of the GNU General Public License
  along with the GPS Code Collection. If not, see
  <http://www.gnu.org/licenses/>.
  
  Copyright (C) 2019-2025 Forschungszentrum Juelich GmbH
*/
 
#include "libgps.h"
 
int main(
  int argc,
  char *argv[]) {
 
  gps_t *gps;
 
  FILE *out;
 
  /* Allocate... */
  ALLOC(gps, gps_t, 1);
 
  /* Check arguments... */
  if (argc < 4)
    ERRMSG("Give parameters: <ctl> <gps.nc> <map.tab>");
 
  /* Get control parameters... */
  const double z = scan_ctl(argc, argv, "Z", -1, "20", NULL);
 
  /* Read gps data... */
  read_gps(argv[2], gps);
 
  /* Create output file... */
  printf("Write map data: %s\n", argv[3]);
  if (!(out = fopen(argv[3], "w")))
    ERRMSG("Cannot create file!");
 
  /* Write header... */
  fprintf(out,
          "# $1 = time [sec]\n"
          "# $2 = altitude [km]\n"
          "# $3 = longitude [deg]\n"
          "# $4 = latitude [deg]\n"
          "# $5 = pressure [hPa]\n"
          "# $6 = temperature [K]\n"
          "# $7 = water vapor vmr [ppm]\n"
          "# $8 = temperature perturbation [K]\n"
          "# $9 = tropopause height [km]\n\n");
 
  /* Write data... */
  for (int ids = 0; ids < gps->nds; ids++)
    for (int iz = 0; iz < gps->nz[ids]; iz++)
      if (fabs(gps->z[ids][iz] - z) < 0.01) {
        fprintf(out, "%.2f %g %g %g %g %g %g %g %g\n",
                gps->time[ids], gps->z[ids][iz], gps->lon[ids][iz],
                gps->lat[ids][iz], gps->p[ids][iz], gps->t[ids][iz],
                gps->wv[ids][iz], gps->pt[ids][iz], gps->th[ids]);
        break;
      }
 
  /* Close file... */
  fclose(out);
 
  /* Free... */
  free(gps);
 
  return EXIT_SUCCESS;
}