next up previous contents index
Next: MODIFY FREQUENCY Up: MODIFY Previous: MODIFY BEAM_EFF   Contents   Index


MODIFY DOPPLER

        LAS\MODIFY DOPPLER [SIGN|*|Value]

    Change the Doppler factor according to the CLASS convention (-V/c). With
    no argument, checks whether the header  value  is  consistent  with  the
    CLASS value computed according to the date and observatory. The checking
    precision  corresponds  to  0.6  m/s  in  V.  A  logical  SIC  variable,
    DOPPLER_PB,  is  set  to  true if the values disagree. If an argument is
    present:

      SIGN   change the sign of the Doppler factor but do not recompute it,
      *      compute and update the Doppler factor according to the  observ-
             ing  date-time  and the observatory position (this position can
             be customized with SET OBSERVATORY),
      Value  set the Doppler factor to <Value>


Gildas manager 2015-03-01