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    • VIIRS/SNPP Water Vapor Level-3 daily 0.5 x 0.5 degree grid

    Metadata Updated: April 9, 2026

    The VIIRS/SNPP Water Vapor Level-3 daily 0.5 x 0.5 degree grid Product provide total column water vapor (TPW) properties from merged VIIRS infrared measurements and Cross-track Infrared Sounder (CrIS) plus Advanced Technology Microwave Sounder (ATMS) water vapor soundings to continue the depiction of global moisture at a higher spatial resolution started with MODIS on the Terra and Aqua platforms. Level-3 global 0.5 degree by 0.5 degree spatial resolution daily mean data products (called WATVP_D3_VIIRS_SNPP) is derived by using a gridding software (called Yori) developed at the University of Wisconsin, Madison, Space Science and Engineering Center (Veglio et al., 2018), and implemented by the NASA VIIRS Atmosphere Science Investigator-led Processing System (SIPS). The Yori has been adapted for the VIIRS TPW products and is processed using the VIIRS Level-2 Water Vapor products (WATVP_L2_VIIRS_SNPP) separated by day and night. The mean and the standard deviation of each Level-2 water vapor product are calculated for each grid cell. The sum, the square of the sum of each product, and the number of pixels in the cells are also stored in the Level-3 (daily) output files for further aggregation purposes.

    Access & Use Information

    Public: This dataset is intended for public access and use. License: See this page for license information.

    Downloads & Resources

    Dates

    Metadata Created Date April 11, 2025
    Metadata Updated Date April 9, 2026

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date April 11, 2025
    Metadata Updated Date April 9, 2026
    Publisher UWI-MAD/SSEC;NASA/GSFC/SED/ESD/HBSL/BISB/MODAPS;NASA/GSFC/SED/ESD/HBSL/BISB/LAADS
    Maintainer
    Identifier 10.5067/VIIRS/WATVP_D3_VIIRS_SNPP.001
    Data Last Modified 2026-04-06
    Category Earth Science
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 93a8cb79-fc3b-48fb-8db5-c3333464a00b
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    License https://www.usa.gov/government-works
    Old Spatial "CARTESIAN",{"WestBoundingCoordinate":-180.0,"NorthBoundingCoordinate":90.0,"EastBoundingCoordinate":180.0,"SouthBoundingCoordinate":-90.0}
    Program Code 026:000
    Source Datajson Identifier True
    Source Hash dabdffe08f8c50c648f661f2b4d1371709f9a747bc3c546ee54ca9f72cdf3356
    Source Schema Version 1.1
    Spatial
    Temporal 2012-05-01/2026-03-30

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