VJ143IA1: VIIRS BRDF/Albedo Model Parameters

500-meter resolution kernel weights from the NOAA-20 VIIRS satellite are produced daily using a 16-day rolling window. The three model parameters—isotropic, volumetric, and geometric—enable the reconstruction of surface anisotropic effects using the RossThick/Li-Sparse-Reciprocal BRDF model. This dataset supports continuity with NASA's MODIS BRDF/Albedo product suite.

Use Cases

• Correcting directional reflectance to a common view geometry based on the BRDF model parameters.
• Computing black-sky albedo at any solar illumination angle using the kernel weights.
• Estimating instantaneous actual albedo (blue-sky albedo) using the provided black-sky and white-sky albedo layers.
• Studying land surface anisotropy and radiative properties across global 500-meter grids.
• Promoting data continuity by comparing VIIRS-derived albedo with historical MODIS products.

Strengths

• Provides daily global coverage at a 500-meter spatial resolution.
• Uses a 16-day temporal composite to improve data stability.
• Designed for continuity with the established MODIS BRDF/Albedo product suite.
• Includes three spectrally dependent kernel weights (fiso, fvol, fgeo) for each imagery band.

Limitations

• Column names and exact data structure are not specified in the provided metadata.
• The 'last updated' date (2026-04-09) appears to be a future date, suggesting potential metadata error.
• Data format is HDF-EOS5, which may require specialized software for access and analysis.

Provenance

Source

LPCLOUD (NASA Earthdata), NOAA-20 VIIRS satellite.

Collection Method

Algorithmically produced from 16 days of VIIRS data using the RossThick/Li-Sparse-Reciprocal BRDF model.

Time Range

Daily production, using a rolling 16-day window.

Freshness

2026-04-09 21:07:08.106971

Geography

Global coverage.