I am using SeaBASS dataset for SST, MODIS Aqua, R2018.
I have 3 questions:
1) How are the BT in the MWIR/LWIR corrected? Can you point me to the appropriate atmospheric correction document for these specific bands please?
2) When using night data (flagged as night), I have an issue at isolating clear sky matchups. The CLDICE flag returns 50 000 cloudy pixels over the 12 million matchups available at night, while it returns 5 million cloudy pixels for daylight matchups. Is there an issue at identifying clouds during the night, does the method differ from daylight? Maybe I missed something.
3) What algorithm is used? Because I use the R2018 reprocess of MODIS Aqua, I downloaded the data in 2021. I am uncertain if the SST4 and SST algorithms come from Kilpatrick et al. (2015) or from the latest formula described in Luo et al. (2019).
Thanks in advance
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The SST product you downloaded should be the most recent R2019 version.
Here is the document about it:
Details about the algorithms used in SST:
Please check these documents and see if you can find the answers for your questions. Let us know if you need more help.
However for my 2nd question, I am still a bit lost.
Any thoughts about why I fail at identifying clear sky pixels at night?
For more details, see:
Thanks for the details!