VIIRS/NPP BRDF/Albedo Model Parameters Daily L3 Global 500 m SIN Grid NRT

Description

The VIIRS/NPP BRDF/Albedo Model Parameters Daily L3 Global 500 m SIN Grid NRT (VNP43IA1N) product provides BRDF/Albedo model parameters at 500 meter (m) resolution. The VNP43IA1N product is produced daily using 16-day VIIRS data (i.e., the current day and the previous 15 days). The VNP43 algorithm uses the RossThick/Li-Sparse-Reciprocal (RTLSR) semi-empirical kernel-driven BRDF model, with the three kernel weights from VNP43IA1N to reconstruct surface anisotropic effects, correcting the directional reflectance to a common view geometry (VNP43IA4N), while also computing integrated black-sky albedo (BSA) at local solar noon and white-sky albedo (WSA) (VNP43IA3N). 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) at https://lpdaac.usgs.gov/sites/default/files/public/product_documentation/vnp43_v1_atbd.pdf. The VNP43IA1N data product provides a total of six SDS layers including: mandatory quality bands and three multi-dimensional model parameter bands representing fiso, fvol, and fgeo of the VIIRS imagery bands: I1, I2, and I3. Each data product file is provided in HDF-EOS5 format.

Resources

Name Format Description Link
5 https://nrt3.modaps.eosdis.nasa.gov%2Farchive%2FallData%2F5000%2FVNP43IA1N%2F
5 https://earthdata.nasa.gov%2Fearth-observation-data%2Fnear-real-time%2Fdownload-nrt-data%2Fviirs-nrt
5 https://nrt3.modaps.eosdis.nasa.gov/archive/allData/5000/VNP43IA1N/
5 https://earthdata.nasa.gov/earth-observation-data/near-real-time/download-nrt-data/viirs-nrt
0 The metadata's original source. https://cmr.earthdata.nasa.gov/search/concepts/C1581591892-LANCEMODIS.iso19115

Tags

  • earth-science-surface-radiative-properties-land-surface-reflectance
  • earth-science-surface-radiative-properties-land-surface-anisotropy
  • earth-science-surface-radiative-properties-land-surface-albedo

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