VJ143D06: VIIRS Geometric BRDF Parameter for Band M2

NOAA-20 VIIRS provides the geometric parameter for Bidirectional Reflectance Distribution Function modeling of band M2 at 0.445 μm wavelength. This daily product synthesizes 16 days of observations into a single, temporally-weighted layer at 1-kilometer resolution for the entire globe. The geometric parameter, alongside isotropic and volumetric parameters, is used to derive surface albedo and reflectance anisotropy for climate simulation models.

Use Cases

• Deriving surface albedo for VIIRS band M2 based on the three BRDF model parameters (isotropic, volumetric, geometric)
• Inputting land surface reflectance anisotropy into global climate simulation models based on the Climate Modeling Grid (CMG) format
• Analyzing temporal changes in surface radiative properties using daily, temporally-weighted data synthesized from a 16-day window
• Studying specific spectral reflectance at 0.445 μm wavelength using the geometric parameter for the VIIRS M2 band

Strengths

• Provides a specific, foundational model parameter (geometric) for BRDF/albedo derivation at a precise wavelength (0.445 μm)
• Offers global coverage at a consistent 1-kilometer (30 arc-second) resolution within a Climate Modeling Grid
• Incorporates algorithmic improvements from previous versions, including better calibration coefficients and geolocation accuracy

Limitations

• Dataset size, row count, and specific column structure are not provided in any source metadata
• Known issues exist and require external consultation of the MODIS/VIIRS Land Quality Assessment website
• Each file contains only one data layer due to large file size, requiring multiple files for complete analysis

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Produced daily from NOAA-20 Visible Infrared Imaging Radiometer Suite (VIIRS) sensor data

Time Range

Daily production, using a rolling 16-day data window

Freshness

2026-03-12 20:03:41.749324

Geography

Global