SET ATMOSPHERE

 

        CLIC\SET ATMOSPHERE argument value [/RECEIVER i]

    Selects the way atmospheric calibration is done by  command  ATMOSPHERE.
    Argument may be FILE, AUTO, TREC, or MANUAL.

      -  In FILE mode the actual mode is taken from  the  data  header,   as
        given in the OBS program.
      - In TREC mode the receiver temperature is assumed known, to  set  the
        scale  of  measured sky temperature and optical depth, and determine
        the system noise temperature.  The  receiver  temperature  is  taken
        from  the  data  header,  as  given  in  OBS.  It may be forced to a
        different value by giving it as second argument 'value', or  by  the
        SET TREC command.
      -  In AUTO mode the water wapor content is  assumed   known;   it   is
        determined  from  the  antennas  in TREC mode, if any, or taken from
        the data header, or forced  to  the  value  given   in   the  second
        argument 'value', or by the SET WATER command.
    These parameters, together with the wheather station data, are  used  to
    compute  the system noise temperature for each antenna.  In MANUAL mode,
    no model atmosphere is used,  but  the  values  of  optical  depths  and
    atmospheric temperatures stored in the data.