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ATMOSPHERE /FREQUENCIES

        ATMOSPHERE /FREQUENCIES SignalVar [IntermediateFrequency]

    Vectorized version of the ATMOSPHERE command.

    In  this  case, the input parameters are identical to the non-vectorized
    form (in particular, they are still scalar) except FREQ_SIG and FREQ_IMA
    which  are  ignored. The list of signal frequencies is read instead from
    the first variable passed to the option. It can be scalar or vector.

    If an intermediate frequency is also provided, a list of image  frequen-
    cies  is  derived  from the signal frequencies, symetric with respect to
    the IF. If the IF is absent, image frequencies are defined identical  to
    the  signal  frequencies, but still used in the ATM computation (in par-
    ticular this gives a decent continuum estimation if  GAIN_IMAGE  is  non
    zero). Set GAIN_IMAGE to zero to remove any image contribution.

    The  atmospheric  excess optical path length is NOT computed by this op-
    tion. Frequencies are all expected in GHz.

    In return, the command stores vectorized products in the following user-
    defined variables:
      ATM%TSYS
      ATM%TAU_H2O
      ATM%TAU_O2
      ATM%TAU_TOT
      ATM%EMIS_SIG
      ATM%EMIS_IMA
      ATM%PATH_SIG
      ATM%PATH_IMA
      ATM%ATM_SIG
      ATM%ATM_IMA
      ATM%TANT
      ATM%IER         ! Error status for each frequency
    Their dimensions match the input frequency lists.


Gildas manager 2018-08-19