VJ143D27: VIIRS BRDF Geometric Parameter for Band M11

VJ143D27 provides the geometric parameter for the Bidirectional Reflectance Distribution Function (BRDF) model for VIIRS band M11 (2.25 μm) at a 30 arc-second (1,000 meter) resolution. This daily product is generated using a 16-day temporal window, weighted to the ninth day, and is formatted on a global Climate Modeling Grid (CMG) for use in climate simulations. The geometric parameter, alongside isotropic and volumetric parameters, is used to derive surface albedo and anisotropy values for the shortwave infrared band.

Use Cases

• Modeling surface albedo for climate simulations based on the global Climate Modeling Grid (CMG) format.
• Analyzing land surface anisotropy and reflectance properties using the geometric BRDF parameter for band M11.
• Integrating daily-updated, temporally smoothed land surface data into time-series analyses of radiative properties.
• Studying surface changes related to snow, vegetation, or soil moisture using the 2.25 μm shortwave infrared band.

Strengths

• Provides a specific, model-ready parameter (geometric) for a key VIIRS band at a consistent 1,000-meter global resolution.
• Cross-platform presence on NASA Earthdata and Data.gov signals its importance and validation within the scientific community.
• Algorithm incorporates improvements from the S-NPP VIIRS V002 version, including better calibration and geolocation accuracy.

Limitations

• Critical metadata such as row count, file size, and specific column names are not provided by any source.
• The dataset is one of 39 separate files (VJ143D01-VJ143D39), requiring users to manage multiple layers for a complete BRDF model.
• Documentation for known issues is external, requiring users to visit a separate website for complete quality assessment.

Provenance

Source

LPCLOUD (NASA Land Processes Distributed Active Archive Center)

Collection Method

Derived from daily NOAA-20 VIIRS satellite observations, processed using a BRDF model.

Time Range

Daily production using a 16-day temporal window; specific start date not provided.

Freshness

Last updated on 2026-04-09 according to nasa_earthdata and datagov.

Geography

Global coverage on a Climate Modeling Grid (CMG).