SET AMPLITUDE

 

        CLIC\SET AMPLITUDE ABSOLUTE|RELATIVE|SCALED [KELVIN|JANSKY]
        [BASELINE|ANTENNA]

    This command decides which scaling factor is applied  to  the  data  for
    plotting   and  writing  the  final  Table, in subsequent PLOT and TABLE
    commands:

      - ABSOLUTE means  that  the  relative  amplitude  calibration  is  not
        applied;
      -  RELATIVE  means  that  the  relative  amplitude   calibration,   as
        determined with SOLVE AMPLITUDE, and stored with STORE AMPLITUDE, is
        applied;
      - SCALED means that the absolute amplitude is divided  by  the  source
        flux
      - ANTENNA|BASELINE switches between Antenna-based  and  Baseline-based
        amplitude  calibrations.   This  switch  will  be  active  for SOLVE
        AMPLITUDE  (calibration  curve   determination),   STORE   AMPLITUDE
        (calibration  curve  store  operation),  and  SET AMPLITUDE RELATIVE
        (for   application).    Both   baseline-based   and    antenna-based
        calibration  curves  may  be  stored  alongside  in the data header,
        independently of each other.


    SCALED is only used  for  the  command  SOLVE  AMPLITUDE  (this  command
    actually forces SET AMPLITUDE SCALED KELVIN).

    The second keyword indicates if conversion between Janskys  and  Kelvins
    is to be done.  With SET AMPLITUDE ABSOLUTE, the amplitudes are normally
    in Kelvins of  main-beam  brightness  temperature,  so  the  default  is
    KELVIN.   With  SET  AMPLITUDE  RELATIVE, the amplitudes are in Janskys,
    since a calibrator of known flux  has  been  used  for  reference.   The
    default  is  then  JANSKY.   If the default is overridden (SET AMPLITUDE
    ABSOLUTE JANSKY or SET AMPLITUDE RELATIVE  KELVIN),  conversion  factors
    are  taken  from  the  scan  headers; these factors may be determined by
    SOLVE FLUX, and stored by STORE FLUX.