Search found 36 matches
- Fri Aug 12, 2022 12:37 pm America/New_York
- Forum: Questions/Comments
- Question: How can I know the resolution of this dataset
- Replies: 2
Re: How can I know the resolution of this dataset
The spatial resolution for L2 JPSS-1/NOAA 20 is 750 m. On this webpage (https://www.nesdis.noaa.gov/current-satellite-missions/currently-flying/joint-polar-satellite-system/jpss-mission-and), it says JPSS covers the entire globe twice a day. You can always find the spatial resolution and much more i...
- Tue Aug 09, 2022 10:36 am America/New_York
- Forum: Questions/Comments
- Question: MODIS L1A bulk downloading
- Replies: 1
Re: MODIS L1A bulk downloading
You can try the methods suggested on these two posts:
viewtopic.php?t=2664
https://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?tid=3081
viewtopic.php?t=2664
https://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?tid=3081
- Mon Aug 08, 2022 3:04 pm America/New_York
- Forum: Questions/Comments
- Question: Sentinel-2 with l2gen
- Replies: 17
Re: Sentinel-2 with l2gen
Hi, The error happens because Sentinel 2A MSI lacks a band around 412nm, which means QAA (https://www.ioccg.org/groups/software.html) is not applicable to MSI. It requires 5 bands in total (412,443,490,555, and 670 nm) but MSI only has 4 of them. My suggestion is changing the iop_opt=3 to iop_opt=7 ...
- Mon Aug 08, 2022 1:15 pm America/New_York
- Forum: Questions/Comments
- Question: Extract chlorophyll -a
- Replies: 2
Re: Extract chlorophyll -a
Adding on to Bing's answer, you can following the tutorial on this page for Pixel Extraction using SeaDAS:
https://seadas.gsfc.nasa.gov/help-8.2.0/pixelExtraction/PixelExtraction.html
Guoqing
https://seadas.gsfc.nasa.gov/help-8.2.0/pixelExtraction/PixelExtraction.html
Guoqing
- Tue Jul 19, 2022 2:18 pm America/New_York
- Forum: Questions/Comments
- Question: CDOM retrievals with SeaDAS from ACOLITE derived Rrs
- Replies: 3
Re: CDOM retrievals with SeaDAS from ACOLITE derived Rrs
Dulci,
Unfortunately, you can only use OCSSW l2gen to produce adg from level 1 data (l1c for sentinel 2).
Here is the algorithm description for IOP including adg443:
https://oceancolor.gsfc.nasa.gov/atbd/giop/
Unfortunately, you can only use OCSSW l2gen to produce adg from level 1 data (l1c for sentinel 2).
Here is the algorithm description for IOP including adg443:
https://oceancolor.gsfc.nasa.gov/atbd/giop/
- Tue Jul 19, 2022 11:26 am America/New_York
- Forum: Questions/Comments
- Question: Water quality data
- Replies: 3
Re: Water quality data
I just did a search on the L1/L2 browser, it works. Can you try again? We had worked on restoring the OB.DAAC L1/L2 database in the past several days. Probably that was the reason.
- Tue Jul 19, 2022 9:19 am America/New_York
- Forum: Questions/Comments
- Question: modis_GEO SeaDAS
- Replies: 2
Re: modis_GEO SeaDAS
We are working on restoring the data for L1. Stay tuned.
- Mon Jul 18, 2022 11:52 pm America/New_York
- Forum: Questions/Comments
- Question: CDOM retrievals with SeaDAS from ACOLITE derived Rrs
- Replies: 3
Re: CDOM retrievals with SeaDAS from ACOLITE derived Rrs
Hi Dulci,
Which CDOM product are you referring to?
I'm not sure how ACOLITE handles Rrs outputs and whether they are consistent with NASA standard products.
SeaDAS help page of l2gen:
https://seadas.gsfc.nasa.gov/help-8.2.0/processors/ProcessL2gen.html
Guoqing
Which CDOM product are you referring to?
I'm not sure how ACOLITE handles Rrs outputs and whether they are consistent with NASA standard products.
SeaDAS help page of l2gen:
https://seadas.gsfc.nasa.gov/help-8.2.0/processors/ProcessL2gen.html
Guoqing
- Mon Jul 18, 2022 11:29 pm America/New_York
- Forum: Questions/Comments
- Question: Water quality data
- Replies: 3
Re: Water quality data
Can you provide more information about which website/page are you using? What date, time, and lat/lon?
- Mon Jul 11, 2022 12:01 pm America/New_York
- Forum: Questions/Comments
- Question: Missing MODIS L1A files in our subscription since 2 days
- Replies: 7
Re: Missing MODIS L1A files in our subscription since 2 days
Hi Jacques,
The problem has been fixed. Please double check.
Guoqing
The problem has been fixed. Please double check.
Guoqing