Hi all, Is anyone changing blackbody_radiation_agenda from its default?
In line with ARTS philosophy of modularity, I once introduced blackbody_radiation_agenda. The default setting for this agenda is the Planck function, defined with respect to frequency. You can also define the Planck function with respect to wavelength. Or apply the Rayleigh-Jeans approximation and set blackbody_radiation to the temperature. The question is if anyone is using these latter options? And if yes, would it be critical to remove the agenda and hard-code what is now the default? It would still be possible to convert final radiances to other units, including wavelength-based ones. This issue has already created problems around DOIT. It makes the conversion to other units less secure. Richard assumes in the non-LTE part that the default is valid. Richard is now extending the scope of the analytical calculation of Jacobians, and this would be much easier with a hard-coded solution. It could be motivated to add methods to mimic details of the calibration process, but this would be complicated with arbitrary source function. In addition, is it possible to simple change the source function without adopting other things? For example, is the line shape function dependent on the source function used? I am here mainly thinking about the (v/v0) pre-factor. Could the different (linear or quadratic in v/v0) here be associated with this issue? Some other theoretical consideration here? In summary, Richard and I want to remove the agenda, both for practical and theoretical reasons. But we don't want to cause problems for someone. If I don't hear anything I maybe start doing changes already Tuesday afternoon. Bye, Patrick _______________________________________________ qpack mailing list [email protected] https://www.sat.ltu.se/mailman/listinfo/qpack
