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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
2024-04-19