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    • VIIRS/NPP DNB BRDF/Albedo Nadir BRDF-Adjusted Ref Daily L3 Global 1km SIN Grid V001

    Metadata Updated: December 7, 2023

    The Suomi National Polar-Orbiting Partnership (Suomi NPP) NASA Visible Infrared Imaging Radiometer Suite (VIIRS) Day/Night Band (DNB) Nadir Bidirectional Reflectance Distribution Function (BRDF) Adjusted Reflectance (NBAR) Version 1 product provides NBAR estimates at 1 kilometer (km) resolution. The VNP43DNB4 product is produced daily using 16 days of VIIRS data and is weighted temporally to the ninth day, which is reflected in the file name. The view angle effects are removed from the directional reflectances resulting in a stable and consistent NBAR product. The VNP43 data products are designed after the Moderate Resolution Imaging Spectroradiometer (MODIS) BRDF/Albedo product suite.

    The VNP43 algorithm uses the RossThick/Li-Sparse-Reciprocal (RTLSR) semi-empirical kernel-driven BRDF model, with the three kernel weights from VNP43DNBA1 to reconstruct surface anisotropic effects, correcting the directional reflectance to a common view geometry (VNP43DNBA4), hile also computing integrated black-sky albedo (BSA) at local solar noon and white-sky albedo (WSA) (VNP43DNBA3). Researchers can use the BRDF model parameters with a simple polynomial to obtain black-sky albedo at any solar illumination angle. Likewise, both the BSA and WSA Science Dataset (SDS) layers can be used with a simple polynomial to manually estimate instantaneous actual albedo (blue-sky albedo). Additional details regarding the methodology are available in the Algorithm Theoretical Basis Document (ATBD).

    The VNP43DNBA4 product includes BRDF/Albedo mandatory quality and nadir reflectance for the VIIRS DNB. A low-resolution browse image is also available showing NBAR of the DNB as a red, green, blue (RGB) image in JPEG format.

    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 November 12, 2020
    Metadata Updated Date December 7, 2023

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

    Graphic Preview

    Browse image for Earthdata Search

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 12, 2020
    Metadata Updated Date December 7, 2023
    Publisher Not provided
    Maintainer
    Identifier C1632561835-LPDAAC_ECS
    Data First Published 2017-11-28
    Language en-US
    Data Last Modified 2017-11-28
    Category NPP-JPSS, 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 Crystal Schaaf, Zhuosen Wang, Xiaoyang Zhang, Alan Strahler . 2019-11-07. VNP43DNBA4. Version 001. VIIRS/NPP DNB BRDF/Albedo Nadir BRDF-Adjusted Ref Daily L3 Global 1km SIN Grid V001 . Sioux Falls, SD, USA . Archived by National Aeronautics and Space Administration, U.S. Government, NASA EOSDIS Land Processes DAAC . https://doi.org/10.5067/VIIRS/VNP43DNBA4.001. https://doi.org/10.5067/VIIRS/VNP43DNBA4.001. Digital Science Data. This data set was provided by the NASA/NOAA NPP Project. The DOI landing page provides citations in APA and Chicago styles. .
    Creator Crystal Schaaf, Zhuosen Wang, Xiaoyang Zhang, Alan Strahler
    Data Presentation Form Digital Science Data
    Graphic Preview Description Browse image for Earthdata Search
    Graphic Preview File https://e4ftl01.cr.usgs.gov//WORKING/BRWS/Browse.001/2021.06.17/BROWSE.VNP43DNBA4.A2021160.h19v08.001.2021168075520.1.jpg
    Harvest Object Id 4b802c3c-7009-474b-8807-a21ab72e5453
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.5067/VIIRS/VNP43DNBA4.001
    Metadata Type geospatial
    Old Spatial -180.0 -90.0 180.0 90.0
    Program Code 026:001
    Release Place Sioux Falls, SD, USA
    Series Name VNP43DNBA4
    Source Datajson Identifier True
    Source Hash c58040434d64f10c16f8569ec99da9a8cf5afb9b20326d18a58ab17c56c1f303
    Source Schema Version 1.1
    Spatial
    Temporal 2012-01-19T00:00:00Z/2022-01-17T00:00:00Z

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