VIIRS Daily BRDF/Albedo Model Parameters at 500m Resolution

VNP43IA1N provides Bidirectional Reflectance Distribution Function (BRDF) and albedo model parameters derived from VIIRS/NPP satellite imagery. The product is generated daily by NASA's LANCEMODIS team using a 16-day rolling window of data and the RossThick/Li-Sparse-Reciprocal kernel-driven model. Each file contains six Science Dataset layers, including quality bands and the fiso, fvol, and fgeo parameters for the I1, I2, and I3 spectral bands.

Use Cases

• Modeling black-sky albedo at any solar angle using the provided fiso, fvol, and fgeo BRDF parameters.
• Correcting directional reflectance to a common view geometry for consistent multi-temporal analysis.
• Estimating instantaneous blue-sky albedo by combining the black-sky and white-sky albedo Science Dataset layers.
• Analyzing land surface anisotropy and radiative properties at a 500-meter global scale.

Strengths

• Provides daily global coverage at a consistent 500-meter spatial resolution.
• Based on a documented, peer-reviewed methodology using the RTLSR BRDF model, as detailed in the Algorithm Theoretical Basis Document.
• Uses a 16-day data window for model stability, balancing temporal responsiveness with data density.

Limitations

• Specific column names, row counts, and file sizes are not provided in the available metadata.
• Conflicting license information exists between sources (specified as 'other-license-specified' on some platforms and null on others).

Provenance

Source

LANCEMODIS (NASA)

Collection Method

Derived from VIIRS/NPP satellite sensor data using the VNP43 algorithm.

Time Range

Daily production with a 16-day rolling input window.

Freshness

2026-03-12 20:12:38.720367

Geography

Global