Level2/Aqua-MODIS : "AQUA_MODIS.20251228T000001.L2.OC.NRT.nc"

[darashayda]

Hello everyone, newbie here and Happy New Year to all.

URL: https://oceandata.sci.gsfc.nasa.gov/directdataaccess/Level-2/Aqua-MODIS/2025/

1. We program in Wolfram Programming Language (cloud version) and I am able to open and read the .nc file in the URL above. All is good!

2. I need a master key-list for all the available polygons for this particular attribute namely "/geophysical_data/chlor_a". I now I am able to read the lat/log from the file itself but the file name itself only encodes the time and the date!

3. For such a particular attributes again the "/geophysical_data/chlor_a" how can I do a search say for past 4 weeks, if possible for a particular polygon (if this makes any sense)

4. See my attached rendering of the actual grid data (pixels), can you help me with the color table please?

In case I am missing on the proper way of asking questions , please be patient and I shall catch up soon!

Dara
Chief of Software
Computational Classnotes
Republic of Ireland

[darashayda]

1. I fudged the color tables for the renderings in my images and would like to learn how to build a color table for each variable e.g. ipar or poc.

2. I also need to search the databases for time, variables and boxes (not even sure what this is). I tried the API/URI however obtained a lot of data I could not make any sense out of.

pdf file for the actual images:

https://drive.google.com/file/d/1yCmbfzwlFrQLY-_VT_a2gJmwMc1_VOd0/view?usp=sharing

pdf was too large to attach, thank you

Dara

[OB ODPS - towens]

Here is a video tutorial about filtering data spatially and temporally in NASA Earth Data Search, including using polygons, rectangles, circles, points, and files.

https://www.youtube.com/watch?v=9tseP9NEDvY

Tommy

[darashayda]

Dear Mr. Tommy thank you, very useful and very happy :)

Could you be kind and show me where the sample URL API code for doing all that from a cloud system script?

Dara

[OB.DAAC-EDL - amscott]

Maybe these presentations are helpful? Cloud Computing Resources on Earthdata website.