Search found 141 matches

by OB WebDev - norman
Fri Jan 26, 2018 11:44 am America/New_York
Forum: Home
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: Home
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: Home
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: Home
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: Home
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: Home
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...
by OB WebDev - norman
Wed Jan 03, 2018 11:05 am America/New_York
Forum: Home
Question: analyse mean chlorophyll
Replies: 4

analyse mean chlorophyll

Hi,

If I were you, I would choose your second method but leave out
the L3mapgen and reprojecting steps.  The L3bindump program
reads level-3 bin files directly, so you do not need to make mapped
versions of the data.

Regards,
Norman
by OB WebDev - norman
Wed Dec 20, 2017 11:59 am America/New_York
Forum: Home
Question: Download L3 level images
Replies: 2

Download L3 level images

Aqua/MODIS data are currently being reprocessed.
Please see the last paragraph here.

https://oceancolor.gsfc.nasa.gov/forum/oceancolor/topic_show.pl?tid=7817

Regards,
Norman
by OB WebDev - norman
Mon Dec 11, 2017 10:36 am America/New_York
Forum: Home
Question: Ideal range of Chlorophyll-a of ocean
Replies: 2

Ideal range of Chlorophyll-a of ocean

Wow.  That is such an broad, open-ended question.  Chlorophyll concentrationsin the global ocean vary cross four orders of magnitude from lows near 0.01milligrams per cubic meter in central ocean gyres to as high as 100 mg/m^3in some highly eutrophic water bodies, and the causes of these v...
by OB WebDev - norman
Fri Dec 08, 2017 3:48 pm America/New_York
Forum: Home
Question: Using GPT's WriteImage Operator to output GeoTIFF
Replies: 26

Using GPT's WriteImage Operator to output GeoTIFF

P.S.I note that our forum software shrinks the image a bit to fitin the forum page frame.  Select "View Image" or "Save Image As ..."in your browser, or go here to see the image at full resolution.https://oceancolor.gsfc.nasa.gov/oceanforum/attach/69/33569/mercator_map_with_...