download specific viirs files from lance nrt

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vllgsbr2
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download specific viirs files from lance nrt

by vllgsbr2 » Thu Feb 27, 2025 1:13 pm America/New_York

https://nrt3.modaps.eosdis.nasa.gov/archive/allData/5200/VJ109_NRT/2025/057/

i'm downloading files from the URL above daily to produce VIIRS based maps of burned areas. I only want files from 19-22Z. how can I use the wget command supplied to filter files outside of this time range? The wget command is below. I've tried some solutions from online but can't get it to work. Has someone successfully done this already? currently I'm just deleting the files after that I don't need.

wget -e robots=off -m -np -R .html,.tmp -nH --cut-dirs=3 "https://nrt3.modaps.eosdis.nasa.gov/archive/allData/5200/VJ109_NRT/2025/057/" --header "Authorization: Bearer INSERT_EDL_TOKEN_HERE" -P .

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LAADS_UserServices_M
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Re: download specific viirs files from lance nrt

by LAADS_UserServices_M » Fri Feb 28, 2025 11:34 am America/New_York

Have you tried any of the download scripts provided on the page:
https://nrt3.modaps.eosdis.nasa.gov/tools-and-services/data-download-scripts/#samples
Also, there are example of "In-house APIs" available from:
https://ladsweb.modaps.eosdis.nasa.gov/tools-and-services/
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vllgsbr2
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Re: download specific viirs files from lance nrt

by vllgsbr2 » Wed Mar 05, 2025 6:24 pm America/New_York

you know what after downloading so many files I now see that they all have systematic times. every 6 minutes (ofc) but the intervals never change. So I think I can confidently just assume the time is divisible by 6. I use to think it could shift to times not divisible by 6. I use the provided wget code as earthdata suggests

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Re: download specific viirs files from lance nrt

by LAADS_UserServices_M » Thu Mar 06, 2025 12:13 pm America/New_York

Yes, VJ109 (and all other VIIRS Level 2 products) are 6-minutes swath product so the acquisition time is incremented by 6-min.
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