VIIRS/NPP Albedo Daily L3 Global 1 km SIN Grid NRT

Description

The VIIRS/NPP Albedo Daily L3 Global 1 km SIN Grid NRT (VNP43MA3N) product provides albedo values at 1 km resolution for the bihemispherical reflectance white-sky albedos (WSA) and directional hemispherical reflectance black-sky albedos (BSA) at local solar noon. The VNP43MA3N 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 VNP43MA1N to reconstruct surface anisotropic effects, correcting the directional reflectance to a common view geometry (VNP43MA4N), while also computing integrated black-sky albedo (BSA) at local solar noon and white-sky albedo (WSA) (VNP43MA3N). 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.pdfThe VNP43MA3N product provides a total of 36 SDS layers including: BSA, WSA, and mandatory quality layers for nine VIIRS moderate bands: M1-M5, M7-M8, and M10-M11, as well as three broadbands: near-infrared (NIR), shortwave infrared (SWIR), and visible (VIS).

Resources

Name Format Description Link
5 https://nrt3.modaps.eosdis.nasa.gov%2Farchive%2FallData%2F5000%2FVNP43MA3N%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/VNP43MA3N/
5 https://earthdata.nasa.gov/earth-observation-data/near-real-time/download-nrt-data/viirs-nrt

Tags

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

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