HEADER command
Keywords: astro

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## `HEADER` command

At any time during an ASTRO session, the `HEADER` command can be used to check the current time and observatory that have been selected. The output of the command also give sun-related information (sun rise, sun set, twilight times).

      UTC :    19-SEP-2007   02:18:59.998
      UT1 :    19-SEP-2007   02:18:59.698    D_UT1 :     -0.300
      TDT :    19-SEP-2007   02:20:05.182    D_TDT :     65.184
      Julian date :          2454362.60
      LST :        02:33:06.1453

      OBS :    BURE   05:54:28.500   44:38:02.000
      Alt.:    2.560 km     Sun Avoidance:    45.0 deg.

      SunRise/Set :      05:23:47.980   17:37:02.472
      Twilight              Start          End
      Civil :            18:10:55.799   04:49:54.653
      Nautical :         18:45:21.460   04:15:28.992
      Astronomical :     19:20:49.604   03:40:00.848