I’m starting working on VIIRS-NOAA 20 L2 data, focusing on the North Adriatic Sea. Doing some comparisons with other sensor data (VIIRS S-NPP, AQUA, TERRA) I noticed that the VIIRS-NOOA20 data are shifted south-eastward.
As an example, I have re-projected using SEADAS one granule for each VIIRS sensor, acquired on the North Adriatic Sea on 31 October 2018 (11:18 NOAA 20 and 12:12 S-NPP). You can see a notable shift between the two images. Also, the map for CLDICE flag for NOAA 20 shows red dots following the coastlines (so the red dot are probably land pixels, that the sensor qualifies as CLDICE due to radiance intensity).
I have noted this behaviour also for other images: is this a geo-location problem along the scan lines?
Thanks for alerting us to the problem :grin: