Search found 142 matches

by GES DISC - jimacker
Tue Mar 02, 2021 2:19 pm America/New_York
Forum: All Questions/Comments
Question: CO2 build up rates and concentrations over North and South polar regions
Replies: 2

Re: CO2 build up rates and concentrations over North and South polar regions

John, Thank you for your comments. OCO-2 uses sunlight to perform its measurements, which limits coverage in the polar regions. "A set of eight measurements are made along a narrow ground track as the spacecraft travels about 2.25 km along its orbit track, providing spatial resolution of <3 km2...
by GES DISC - jimacker
Tue Mar 02, 2021 11:58 am America/New_York
Forum: All Questions/Comments
Question: Regridding and plotting OMI_MINDS_NO2_1 data
Replies: 4

Re: Regridding and plotting OMI_MINDS_NO2_1 data

Hello,
To assist you further, our data specialist would like to know if you are interested in grid sizes other than 0.25 degree, and what temporal period you are investigating.

Thanks!
by GES DISC - jimacker
Mon Mar 01, 2021 2:22 pm America/New_York
Forum: All Questions/Comments
Question: Regridding and plotting OMI_MINDS_NO2_1 data
Replies: 4

Re: Regridding and plotting OMI_MINDS_NO2_1 data

I apologize for the weekend delay. I will forward your question to our scientific staff. While waiting for their response, I recommend examining this How-To document to determine if will assist your efforts: https://disc.sci.gsfc.nasa.gov/information/howto?keywords=regrid%20plot&title=How%20To%2...
by GES DISC - jimacker
Fri Feb 26, 2021 2:10 pm America/New_York
Forum: All Questions/Comments
Question: Importing data from giovanni to excel
Replies: 1

Re: Importing data from giovanni to excel

Yes, this can still be done. For area-averaged time-series data, the output is still available as CSV, consisting of time/date and the value of the area average for each time increment. If you are seeking the values from the grid of a time-averaged map, we have a How-To document describing how this ...
by GES DISC - jimacker
Fri Feb 26, 2021 1:48 pm America/New_York
Forum: All Questions/Comments
Question: Regridding and plotting OMI_MINDS_NO2_1 data
Replies: 4

Re: Regridding and plotting OMI_MINDS_NO2_1 data

Hello and thanks for your question. We can consult our data specialists and reply shortly. Two questions to aid us in our response: 1. Are you seeking Level 2 swath data or Level 3 global gridded data? 2. If L3, do you want to subset for a region or acquire the full global file? Because you asked ab...
by GES DISC - jimacker
Mon Feb 22, 2021 12:43 pm America/New_York
Forum: All Questions/Comments
Question: Downloading MODIS-Aqua Mapped product programmatically
Replies: 3

Re: Downloading MODIS-Aqua Mapped product programmatically

Hello, You can download data for a specified bounding box using Giovanni for the MODIS-Aqua mapped 4 km resolution data product. We are awaiting an update for the latter half of 2020, which is in progress. https://giovanni.gsfc.nasa.gov The OB.DAAC staff may also reply to your query here; I am just ...
by GES DISC - jimacker
Fri Feb 19, 2021 12:48 pm America/New_York
Forum: All Questions/Comments
Question: How long does it take NASA to ping a satellite or spacecraft that's orbiting the earth’s moon?
Replies: 1

Re: How long does it take NASA to ping a satellite or spacecraft that orbiting the earth’s moon?

The Earth-Moon distance varies slightly, so the exact signal timing will vary in length as well. You may find this of interest (it includes a statement of a particular Earth-Moon-Earth communications delay). https://aapt.scitation.org/doi/pdf/10.1119/1.2353576 Exact measurements of radar return time...
by GES DISC - jimacker
Fri Feb 19, 2021 12:35 pm America/New_York
Forum: All Questions/Comments
Question: Help on accessing numerical data sheets on Net Primary Production
Replies: 4

Re: Help on accessing numerical data sheets on Net Primary Production

Hello, You can obtain terrestrial NPP from MODIS via the LP DAAC. https://earthdata.nasa.gov/search?q=npp+mod17a3 Ocean NPP based on SeaWiFS data is available here http://sites.science.oregonstate.edu/ocean.productivity/ This can probably be used for basic estimates even though the time period is 19...
by GES DISC - jimacker
Tue Feb 16, 2021 1:45 pm America/New_York
Forum: All Questions/Comments
Question: Help on accessing numerical data sheets on Net Primary Production
Replies: 4

Re: Help on accessing numerical data sheets on Net Primary Production

Hello,

Are you trying to find terrestrial NPP, oceanic, or total?
by GES DISC - jimacker
Wed Jan 27, 2021 12:23 pm America/New_York
Forum: All Questions/Comments
Question: Satellite Image Neede
Replies: 4

Re: Satellite Image Neede

Cloud cover is going to limit your options (as it does for many aspects of satellite remote sensing). There are satellites that acquire radar data (synthetic aperture radar, SAR) that can see through clouds, but I'm not sure they would show anything that you need to see, and you may have to pay for ...