Search found 135 matches

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
by OB WebDev - norman
Tue Jan 23, 2018 5:11 pm America/New_York
Forum: Questions/Comments
Question: How i can get the dat of SST and Chl
Replies: 1

How i can get the dat of SST and Chl

Here's a start.

https://oceancolor.gsfc.nasa.gov/cgi/browse.pl?sub=level1or2list&per=YR&day=17532&sen=am@v0&n=30&s=29&w=-10&e=-9&dnm=D

Please see the Help pages (button in the upper right corner on above page).

Regards,
Norman
by OB WebDev - norman
Mon Jan 22, 2018 9:15 am America/New_York
Forum: Questions/Comments
Question: Regarding the resolution of MODIS SST after reprojcetion
Replies: 2

Regarding the resolution of MODIS SST after reprojcetion

Hi Swathy,Note that MODIS pixel sizes are  1 kilometer at nadir only and increasein size away from the center of each scan.  This is the reason that ourofficial level-3 bin sizes for MODIS are 4.64 kilometers (i.e. 21.5 squarekilometers).  See https://oceancolor.gsfc.nasa.gov/docs/for...
by OB WebDev - norman
Tue Jan 09, 2018 1:27 pm America/New_York
Forum: Questions/Comments
Question: analyse mean chlorophyll
Replies: 4

analyse mean chlorophyll

There are many ways to handle the output of l3bindump.Here is one that I would use involving Perl to parse the l3bindump output.# To get the mean value of chlorophyll concentration for an arbitrary region.l3bindump ifile=A20173052017334.L3b_MO_CHL.nc l3bprod=chlor_a \        ...
by OB WebDev - norman
Tue Jan 09, 2018 11:13 am America/New_York
Forum: Questions/Comments
Question: Comparison of MODIS/VIIRS R2018 OCX
Replies: 7

Comparison of MODIS/VIIRS R2018 OCX

Hi Philippe,I leave it to others in our group to speculate on causes, but I can confirm thebias you are seeing.  The following are plots of the median global chlor_a valuestaken from the daily level-3 bin files in our archive.Aqua/MODIS:https://oceancolor.gsfc.nasa.gov/cgi/l3bts?mssn=MODISA&...
by OB WebDev - norman
Thu Jan 04, 2018 11:14 am America/New_York
Forum: Questions/Comments
Question: incomplete upload
Replies: 4

incomplete upload

Your question is not very specific, so it's hard to give a specific answer.Assuming that you have ASCII data records containing latitude, longitude,and geophysical value (output from l3bindump, for example), then you couldfollow this basic outline.(1) Use your favorite map projection (e.g. Merca...