Aqua MODIS L1B processing problem (since 2024-04-01)

[slwood]

Hi,

Since around 14:00 2024-04-01 all our MODIS Aqua L1B processing fails with error message (in LogReport):

TDLUT_ReadPeicewiseLinearFunction():MODIS_F_NOK:295817224
LUT associated with “m1” has times out of order.

As far as I can tell the LUTs were last updated at the end of October 2023 (to MYD02 LUTs V6.2.1.90_OC_v2.14) and this has been running fine until 3 days ago. There have been no code updates for a couple of years.

I saw a recent post from Karen North on the DRL users list describing what might be a similar problem with the IPOPP SPA, suggesting they were keeping LUTs back to a version from late 2022 – we run L1 processing components from SeaDAS/OCSSW but I understood them to be basically the same.

Anybody got any pointers here – or similar experience?

Thanks
Simon

[slwood]

Hello again,

Outside of this forum Liam Gumley just advised that there was a problem with the Reflective LUT V6.2.1.90_OC_v2.14 which has now been corrected. I found I had to delete my local copy first before update_luts.py would fetch the updated one, but with that done the updated file was downloaded and it does indeed fix this problem.

Posting solution here in case others affected.

Thanks
S