Search found 140 matches

by OB WebDev - norman
Wed Aug 08, 2018 8:55 am America/New_York
Forum: Questions/Comments
Question: Depth - Chlorophyll concentration, OCI Algorithm
Replies: 1

Depth - Chlorophyll concentration, OCI Algorithm

Hi Isabella,It all depends on the clarity of the water.  In very clear,low-chlorophyll waters, an orbiting sensor like MODIScan sense photons reflected from 30 meters below thesurface.  In very turbid or very high-chlorophyll waters,all of the received water-leaving radiance comes fromthe ...
by OB WebDev - norman
Tue Jul 10, 2018 10:13 am America/New_York
Forum: Questions/Comments
Question: Extracting Cholorophyll a concentration for one station and 1000 km around of it
Replies: 14

Extracting Cholorophyll a concentration for one station and 1000 km around of it

Marjan,The OCSSW processing programs are distributed with SeaDAS.You may wish to spend some time perusing our site to learn aboutocean-color remote sensing.https://oceancolor.gsfc.nasa.gov/https://oceancolor.gsfc.nasa.gov/products/https://oceancolor.gsfc.nasa.gov/atbd/https://www.youtube.com/user/na...
by OB WebDev - norman
Tue Jul 10, 2018 9:57 am America/New_York
Forum: Questions/Comments
Question: I could not get any result for January around of my station
Replies: 1

I could not get any result for January around of my station

Hi Marjan,Because of the MODIS swath width and the division of the data into5-minute chunks,  there is no way that a single MODIS scene can containthe entire region within 1200 kilometers of your station.  To get anyresults, you need to either reduce the percentage of your area ofinterest ...
by OB WebDev - norman
Tue Jul 10, 2018 9:25 am America/New_York
Forum: Questions/Comments
Question: Detailed questions about level2 data
Replies: 1

Detailed questions about level2 data

Hi,1.  Yes, each MODIS file we archive covers 5 minutes of data collection.     VIIRS data are split into 6-minute chunks. Other data sets such as     SeaWiFS have variable length files.2.  There was no attachment, but I'll assume you are referring to an&#...
by OB WebDev - norman
Tue Jul 03, 2018 4:54 pm America/New_York
Forum: Questions/Comments
Question: I can not see MASKS in my data
Replies: 4

I can not see MASKS in my data

Hi,Have a look at the following tutorial that our own Danny recorded.https://www.youtube.com/watch?v=kI6x3sDjFQQSee alsohttps://oceancolor.gsfc.nasa.gov/atbd/sst/flag/for information on SST flags and SST quality levelsandhttps://oceancolor.gsfc.nasa.gov/atbd/ocl2flags/for information on our levgel-2...
by OB WebDev - norman
Tue Jun 12, 2018 4:33 pm America/New_York
Forum: Questions/Comments
Question: VIIRS Level 1B data
Replies: 1

VIIRS Level 1B data

Hi,

We do not archive VIIRS L1B data, but you can generate them
yourself using the SeaDAS software we provide.
See the libgen help page.
https://seadas.gsfc.nasa.gov/help/seadas-processing/ProcessL1bgen.html

Regards,
Norman
by OB WebDev - norman
Wed May 23, 2018 4:58 pm America/New_York
Forum: Questions/Comments
Question: No lat/lon info in Meris L3 chlor_a
Replies: 2

No lat/lon info in Meris L3 chlor_a

Hi Z,You do not need to read lat/lon information for any of our  level-3, mapped files (L3m)because the data are already in a known projection, namely, plate carrée (alsoknown as simple cylindrical) centered on the prime meridian.We have not yet reprocessed our MERIS data holdings, so the level...
by OB WebDev - norman
Thu Feb 15, 2018 9:21 am America/New_York
Forum: Questions/Comments
Question: L1/L2 Browser error for large searches
Replies: 8

L1/L2 Browser error for large searches

Hi,Yes, your search is probably timing out.  I get the same result.  I kept halving thesearch time period until I got one which works (1 Jan - 15 Feb 2004).  That searchreturned 572 scenes.https://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sub=level1or2list&per=CSTM&day=12418+46&a...
by OB WebDev - norman
Fri Jan 26, 2018 11:44 am America/New_York
Forum: Questions/Comments
Question: MODISA R2018 Climatology products missing?
Replies: 1

MODISA R2018 Climatology products missing?

Hi Toby,

Thanks for pointing this out.  The missing climatologies are being
filled in.

Norman