Hello ARTS Developers,
I'm trying to retrieve the Frequnecy Shift along with Wind with the ARTS
internal retrieval. To my understanding, this should work, but support
in xaStandard and x2artsStandard WSMs is missing and results in an
error: "Found a retrieval quantity that is not yet handled by internal
retrievals: Frequency"
For xaStandard(), the a priori Frequency Shift could easily be set to
zero after line 793 of m_oem.cc along with baseline and pointing.
For x2artsStandard(), maybe a new WSV would make sense (f_shift) and the
inversion_iterate_agenda would then call
abs_linesShiftFrequency(f_shift), similar to the baseline stuff?
I tried to implement it myself but got stuck with jacobian_quantities
and indices in x2artsStandard().
Best regards,
Jonas Hagen
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