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    • VIIRS/NOAA20 Dark Target Aerosol 6-Min L2 Swath 6 km

    Metadata Updated: June 11, 2024

    The VIIRS/NOAA20 Dark Target Aerosol L2 6-Min Swath 6 km product provides satellite-derived measurements of Aerosol Optical Thickness (AOT) and their properties over land and ocean, and spectral AOT and their size parameters over oceans every 6 minutes, globally. The NOAA-20 - formerly the Joint Polar Satellite System-1 (JPSS-1) - Visible Infrared Imaging Radiometer Suite (VIIRS) incarnation of the dark target (DT) aerosol product is based on the same DT algorithm that was developed and used to derive products from the Terra and Aqua mission's MODIS instruments. Two separate and distinct DT algorithms exist. One helps retrieve aerosol information over ocean (dark in visible and longer wavelengths), while the second aids retrievals over vegetated/dark-soiled land (dark in the visible).

    This orbit-level product (Short-name: AERDT_L2_VIIRS_NOAA20) has an at-nadir resolution of 6 km x 6 km, and progressively increases away from nadir given the sensor's scanning geometry and Earth's curvature. Viewed differently, this product's resolution accommodates 8 x 8 native VIIRS moderate-resolution (M-band) pixels that nominally have ~750 m horizontal pixel size. Hence, the Level-2 Dark Target Aerosol Optical Thickness data product incorporates 64 (750 m) pixels over a 6-minute acquisition. This Version-2 set of products is the first collection of the Level-2 Dark Target Aerosol derived from the NOAA-20 VIIRS source. Hence, it bears outlining the differences between the products derived from NOAA-20 VIIRS as against the Suomi National Polar-orbiting Partnership (SNPP) VIIRS.

    For more information consult LAADS product description page at:

    https://ladsweb.modaps.eosdis.nasa.gov/missions-and-measurements/products/AERDT_L2_VIIRS_NOAA20

    Or, Dark Target aerosol team Page at: https://darktarget.gsfc.nasa.gov/

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Created Date October 4, 2023
    Metadata Updated Date June 11, 2024

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date October 4, 2023
    Metadata Updated Date June 11, 2024
    Publisher Not provided
    Maintainer
    Identifier C2772641628-LAADS
    Data First Published 2023-08-01
    Language en-US
    Data Last Modified 2024-06-05
    Category NOAA - SPACE WEATHER PROGRAM, geospatial
    Public Access Level public
    Bureau Code 026:00
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.nasa.gov/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Citation NASA VIIRS Atmosphere SIPS. 2023-09-21. VIIRS/NOAA20 Dark Target Aerosol L2 6-Min Swath 6 km. Version 2. MODAPS at NASA/GSFC. Archived by National Aeronautics and Space Administration, U.S. Government, L1 and Atmosphere Archive and Distribution System (LAADS). https://doi.org/10.5067/VIIRS/AERDT_L2_VIIRS_NOAA20.002. https://doi.org/10.5067/VIIRS/AERDT_L2_VIIRS_NOAA20.002.
    Creator NASA VIIRS Atmosphere SIPS
    Harvest Object Id 3b3b78a2-187b-4901-a82a-7740354d76f0
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/VIIRS/AERDT_L2_VIIRS_NOAA20.002
    Metadata Type geospatial
    Old Spatial -180.0 -90.0 180.0 90.0
    Program Code 026:001
    Release Place MODAPS at NASA/GSFC
    Source Datajson Identifier True
    Source Hash 132b022900f3262aad4464f1059a5ded44b30fe69e8d8c51780cd1f41427a8d0
    Source Schema Version 1.1
    Spatial
    Temporal 2018-02-17T00:00:00Z/2024-06-10T00:00:00Z

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