Recent change in CO Einstein coefficients ?

[erwanp]

Hello @RomanKochanov and the HITRAN team,

I work on the Python code RADIS which computes spectra from HITRAN/HITEMP/etc., with a focus on high-temperature spectra with millions of lines.

One of our validation test uses HAPI as a reference and recently failed (https://github.com/radis/radis/issues/160) because of an unexpected change in CO Einstein coefficients downloaded from HITRAN, compared to hardcoded values. I'm surprised that the test did not fail before, given that our hardcoded values have not changed in the past 3 years..

• Was there are a recent change in CO Einstein coefficient ? HITRAN news do not indicate any update to CO lines.

• Changes are about ~2% (not a lot, but enough to trig the error in RADIS). See below (comparaison with "old" from 1 year ago, 2019) :

• More importantly, there seem to be major changes in the latest columns "ierr", "iref", "line_mixing_flag", compared to values from 2019. Can this be a a problem ?

[erwanp]

Update 30/12/20 : I see that a change of ~2% has now been announced on the HITRAN website, so we can close the issue!