Closed sfinkens closed 1 year ago
cc @oliversus
As I wrote in point 3 above, the calibration coefficients for channel 3a for satellites NOAA-18 and NOAA-19 are still not properly defined in the latest update of the calibration files from NOAA (avhrr_v2021r1.tar). However, Mike Foster sent an update on 5th of January 2023 which provides the following default (prelaunch) values for the S0 coefficient for channel 3a for these two satellites: NOAA-18: S0 = 0.10566857 NOAA-19: S0 = 0.10742857
I have prepared a new version of the calibration.json file where these values are updated. I hope this is the final version. Next update will give us a completely new version based on analysis of additional data for 2021-2022 period. This new version will be delivered sometime in 2023. Hopefully, this new version will give us useful time-dependent corrections for Metop-C. Until then we have to use prelaunch coefficients for all visible channels (only S0 being non-zero) for Metop-C.
@abhaydd @kgkarl Did you receive an update from Mike in the meantime? Or how should we proceed on this? I think it would be important to properly test the coefficients that deviate from the NOAA version.
We have not yet received the new 2023 update but it should be available very soon. There is at least a new place holder for it at https://cimss.ssec.wisc.edu/patmosx/calibration/ (“2023 instrument files”) but still without content. Let’s wait another week or two before making our next action towards Mike.
/Karl-Göran
Från: Stephan Finkensieper @.> Skickat: den 26 juni 2023 13:32 Till: pytroll/pygac @.> Kopia: Karlsson Karl-Göran @.>; Mention @.> Ämne: Re: [pytroll/pygac] Update calibration coefficients to version 2021 (PR #121)
@abhayddhttps://github.com/abhaydd @kgkarlhttps://github.com/kgkarl Did you receive an update from Mike in the meantime? Or how should we proceed on this? I think it would be important to properly test the coefficients that deviate from the NOAA version.
— Reply to this email directly, view it on GitHubhttps://github.com/pytroll/pygac/pull/121#issuecomment-1607277277, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AD736B2QIVND7UQRZ37VDSDXNFXKPANCNFSM6AAAAAATQSNQ5E. You are receiving this because you were mentioned.Message ID: @.**@.>>
I noticed that the new calibration version from 2023 is now posted at the PATMOS-x calibration site (“AVHRR instrument files with latest calibration coefficients [2023]”). Please try to update the calibration in Pygac as soon as possible.
/Karl-Göran
Från: Karlsson Karl-Göran Skickat: den 11 juli 2023 15:35 Till: 'pytroll/pygac' @.***> Ämne: SV: [pytroll/pygac] Update calibration coefficients to version 2021 (PR #121)
We have not yet received the new 2023 update but it should be available very soon. There is at least a new place holder for it at https://cimss.ssec.wisc.edu/patmosx/calibration/ (“2023 instrument files”) but still without content. Let’s wait another week or two before making our next action towards Mike.
/Karl-Göran
Från: Stephan Finkensieper @.**@.>> Skickat: den 26 juni 2023 13:32 Till: pytroll/pygac @.**@.>> Kopia: Karlsson Karl-Göran @.**@.>>; Mention @.**@.>> Ämne: Re: [pytroll/pygac] Update calibration coefficients to version 2021 (PR #121)
@abhayddhttps://github.com/abhaydd @kgkarlhttps://github.com/kgkarl Did you receive an update from Mike in the meantime? Or how should we proceed on this? I think it would be important to properly test the coefficients that deviate from the NOAA version.
— Reply to this email directly, view it on GitHubhttps://github.com/pytroll/pygac/pull/121#issuecomment-1607277277, or unsubscribehttps://github.com/notifications/unsubscribe-auth/AD736B2QIVND7UQRZ37VDSDXNFXKPANCNFSM6AAAAAATQSNQ5E. You are receiving this because you were mentioned.Message ID: @.**@.>>
👍 Thanks for checking @kgkarl! I'll put it on my list, but it might take a while 🙈
Closing in favor of https://github.com/pytroll/pygac/pull/124
Proposal by @kgkarl: Update calibration coefficients to PATMOS-X version 2021. Note that the coefficients in this PR deviate from the original NOAA coefficients. I think this should be discussed in the community. For comparison I uploaded the original v2021 coefficients here.
Explanation by @kgkarl:
TODO: