Search found 39 matches

by madjidh
Fri Jul 29, 2022 6:44 am America/New_York
Forum: Questions/Comments
Question: [SeaBASS - MODISA] SST retrieval at night
Replies: 5

Re: [SeaBASS - MODISA] SST retrieval at night

I understand now. I was using l2flags because I included visible bands along with IR/MWIR/LWIR to try to improve retrievals over noisy matchups. But I guess I will switch to qual_sst.

Thanks for the details!
by madjidh
Thu Jul 28, 2022 6:57 am America/New_York
Forum: Questions/Comments
Question: [SeaBASS - MODISA] SST retrieval at night
Replies: 5

Re: [SeaBASS - MODISA] SST retrieval at night

Hello, my question is still up, if someone can please get in touch with me to unlock the situation? I can provide more details if required.
by madjidh
Thu Jul 14, 2022 10:57 am America/New_York
Forum: Questions/Comments
Question: [SeaBASS - MODISA] SST retrieval at night
Replies: 5

Re: [SeaBASS - MODISA] SST retrieval at night

Thank you for the answer, I now understand 1) and 3).
However for my 2nd question, I am still a bit lost.
Any thoughts about why I fail at identifying clear sky pixels at night?

Cheers
by madjidh
Fri Jul 08, 2022 6:10 am America/New_York
Forum: Questions/Comments
Question: [SeaBASS - MODISA] SST retrieval at night
Replies: 5

[SeaBASS - MODISA] SST retrieval at night

Hello, 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 isolati...
by madjidh
Thu Jan 13, 2022 7:06 am America/New_York
Forum: Questions/Comments
Question: SST algorithms performances at night
Replies: 3

Re: SST algorithms performances at night

Thank you for the answer, solving my problem ! I should have checked the header carefully.

Best
by madjidh
Tue Jan 11, 2022 7:32 am America/New_York
Forum: Questions/Comments
Question: SST algorithms performances at night
Replies: 3

Re: SST algorithms performances at night

Hello, I am still looking for an answer for this question.

I have one more question that may solve my problem, is the time of the matchups in the SeaBASS SST dataset associated to a specific location (like UTC or Eastern US time) or to the matchup point ?

Cheers
by madjidh
Wed Dec 15, 2021 9:22 am America/New_York
Forum: Questions/Comments
Question: SST algorithms performances at night
Replies: 3

SST algorithms performances at night

Hello, I have read that the SST4 algorithm performs poorer during daylight compared to SST11 due to glint sensitivity around 4 microns mostly. I also read that it is the opposite during night time, with SST4 having better performances compared to SST11, which is why NASA's SST product are SST11 duri...
by madjidh
Sun Dec 05, 2021 10:21 am America/New_York
Forum: Questions/Comments
Question: Processing using l2gen: several questions
Replies: 4

Re: Processing using l2gen: several questions

Thank you very much Sean for the explanations !
by madjidh
Fri Dec 03, 2021 9:33 am America/New_York
Forum: Questions/Comments
Question: Processing using l2gen: several questions
Replies: 4

Re: Processing using l2gen: several questions

Thanks for the previous reply Sean, but I am sorry to say I am still unsure what masks have been applied to my Level 3 output. My processing steps are: After using L2GEN my L2 product shows "CLDICE" and "HILT" . I then use L2BIN and I apply "ATM FAIL" to mask data where...
by madjidh
Wed Dec 01, 2021 10:55 am America/New_York
Forum: Questions/Comments
Question: Processing using l2gen: several questions
Replies: 4

Processing using l2gen: several questions

Hello, I am using l2gen to generate L2 files for some specific variables. An example of my linux command line code: l2gen ifile=$L1BFILE geofile=$GEOFILE ofile=$L2FILE \ l2prod1='senz,l2_flags,chl_gsm,chlor_a' \ 1) When I use ncdump / ncdisp on my freshly created file, I can see the line: "mask...