MODISA Level 3 Mask question

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MODISA Level 3 Mask question

by jessicaborgespost » Fri Apr 21, 2023 11:57 pm America/New_York

Hello, I have been currently downloading MODISA Level 3 SST data for the Pacific region using entire composite missions. However, I noticed that for most islands the entire domain has 0 quality flags. Can I just confirm what it means?
Also, most of the islands are not masked in the output data, I would just like to confirm if indeed MODIS was not able to capture the land within its resolution of if there is a mask product I can additionally use?
Thank you.


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Re: MODISA Level 3 Mask question

by OB General Science - guoqingw » Tue May 30, 2023 11:45 am America/New_York

Sorry for the delayed response. There is no flag information on level 3 data. As binned data from level 2, level 3 data only used l2flags for quality control purpose in the binning procedure. Here are some documents that you can refer to about the details:

So, to answer your question, it's better to look at the level 2 data of the region to see whether there is a land mask for the islands. You probably will find the l1/l2 browser a helpful tool:

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