VNP43MA1: VIIRS/NPP Daily BRDF and Albedo Model Parameters at 1km

Global daily data provides Bidirectional Reflectance Distribution Function (BRDF) and albedo model parameters at a 1-kilometer spatial resolution. The dataset is generated from 16-day Suomi NPP VIIRS observations, weighted to the 9th day, using the RossThick/Li-Sparse-Reciprocal kernel-driven model to characterize surface anisotropy. It includes 24 Science Dataset layers, such as the fiso, fvol, and fgeo parameters for multiple spectral bands, designed to ensure continuity with NASA's MODIS BRDF/Albedo product suite.

Use Cases

• Correcting directional reflectance to a common view geometry using the provided BRDF model parameters.
• Calculating black-sky albedo at any solar illumination angle via polynomial application to the fiso, fvol, and fgeo parameters.
• Estimating instantaneous blue-sky albedo by combining the provided black-sky and white-sky albedo layers.
• Monitoring temporal changes in land surface anisotropy and reflectance for climate and vegetation studies.

Strengths

• Provides continuity with the established NASA MODIS BRDF/Albedo product suite.
• Contains 24 specific Science Dataset layers, including three multi-dimensional model parameter bands for multiple VIIRS spectral bands.
• Is produced daily with a defined 1-kilometer spatial resolution and a 16-day temporal compositing window.

Limitations

• Metadata for row count, file size, and specific column names is unavailable across all sources.
• The 'last updated' dates on datagov are in the future (2026), indicating a potential metadata conflict or error.
• Documentation of known issues requires external reference to the MODIS/VIIRS Land Quality Assessment website.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Produced daily from 16-day Suomi NPP VIIRS satellite observations using the RTLSR BRDF model.

Time Range

Daily production, weighted to the 9th day of a 16-day composite.

Freshness

2026-04-09 20:43:54.616813

Geography

Global