Search found 135 matches

by OB WebDev - norman
Wed Jan 03, 2018 11:05 am America/New_York
Forum: Questions/Comments
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: Questions/Comments
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: Questions/Comments
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: Questions/Comments
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_...
by OB WebDev - norman
Fri Dec 08, 2017 3:31 pm America/New_York
Forum: Questions/Comments
Question: Using GPT's WriteImage Operator to output GeoTIFF
Replies: 26

Using GPT's WriteImage Operator to output GeoTIFF

Here is a Mercator map of your region with length scales overlaidto help reinforce what Danny said about the projection not beingequal-area.  Only at 30 degrees North in the attached image are thepixels 1100x1100 meters.  North of that latitude pixels cover smallerareas while pixels cover ...
by OB WebDev - norman
Thu Dec 07, 2017 4:26 pm America/New_York
Forum: Questions/Comments
Question: Using GPT's WriteImage Operator to output GeoTIFF
Replies: 26

Using GPT's WriteImage Operator to output GeoTIFF

Hi Simkins,I've been following this thread and think it might be useful if you coulddescribe exactly what input products you are using and what end resultyou are trying to achieve.  It sounds to me like you want to map level-2SST data to some sort of equal-area projection having pixels that...
by OB WebDev - norman
Thu Sep 28, 2017 11:22 am America/New_York
Forum: Questions/Comments
Question: Featured images
Replies: 10

Featured images

Hi Kim,The procedures I use to make the images that you may have seen vary a bit dependingon the scene in question, but there are some general similarities.  I'll share some ofthe process that went into making the current feature image in case that helps.The following bash script makes use ...
by OB WebDev - norman
Mon Sep 25, 2017 11:14 am America/New_York
Forum: Questions/Comments
Question: Aqua MODIS Calcite product
Replies: 7

Aqua MODIS Calcite product

Hi Lionel,

I believe that SeaDAS should automatically apply the scaling.
Other packages would not necessarily be coded to do that.

Norman
by OB WebDev - norman
Mon Sep 25, 2017 9:24 am America/New_York
Forum: Questions/Comments
Question: No data for PAR products L2
Replies: 4

No data for PAR products L2

Dear João,I downloaded your first example file and counted the number of no-data pixels.wget https://oceandata.sci.gsfc.nasa.gov/cgi/getfile/A2008114163500.L2_LAC_OC.nch5dump -d /geophysical_data/chlor_a -b -o chl A2008114163500.L2_LAC_OC.nc h5dump -d /geophysical_data/par -b -o par A20081143500.L2_...