double firsttime, lasttime;
int countinuous;
t_calcephbin *peph;

/* open the ephemeris file */
peph = calceph_open("example1.dat");
if (peph)
{
  if (calceph_gettimespan(peph,  &firsttime, &lasttime, &countinuous))
      printf("%23.16E %23.16E %d\n", firsttime, lasttime, countinuous);

  /* close the ephemeris file */
  calceph_close(peph);
}