VJ143D01: VIIRS BRDF Isotropic Parameter for Band M1

NOAA-20 VIIRS VJ143D01 provides the isotropic model parameter for Bidirectional Reflectance Distribution Function (BRDF) and albedo calculations for the M1 spectral band (0.412 μm). This daily, global product is generated at a 30 arc-second (1,000 meter) resolution using a 16-day temporal composite weighted to the ninth day and is formatted on a Climate Modeling Grid (CMG). The parameter is one of 39 separate files in the VJ143D suite, which includes data for nine VIIRS moderate bands, visible/NIR/shortwave bands, and the Day/Night Band.

Use Cases

• Deriving surface albedo for climate models based on the suite of isotropic, volumetric, and geometric BRDF parameters.
• Analyzing land surface anisotropy and reflectance properties using the 0.412 μm (M1) spectral band data.
• Incorporating temporally smoothed, global surface reflectance data into climate simulation grids (CMG).
• Assessing surface radiative properties for the VIIRS Day/Night Band (DNB) using the extended parameter suite (VJ143D37-39).

Strengths

• Provides a specific, foundational parameter (isotropic) for BRDF/albedo modeling at a consistent 1-km global resolution.
• Offers daily temporal compositing with a 16-day window for noise reduction and temporal weighting to a central date.
• Cross-platform presence on Data.gov and NASA EarthData signals its importance and reliability for the scientific community.
• Algorithm includes improvements from the S-NPP VIIRS V002 version, such as enhanced calibration and geolocation accuracy.

Limitations

• Metadata completeness is medium; column names, row counts, and exact file sizes are not provided in any source.
• Each product file contains only one data layer, requiring users to manage and combine 39 separate files for a complete analysis.
• Known issues exist and require consultation of an external website for full details, indicating potential data quality caveats.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Produced daily from NOAA-20 VIIRS sensor data using a 16-day composite algorithm.

Time Range

Daily production, temporal weighting to a central ninth day within a 16-day window.

Freshness

2026-04-09 21:07:22.490299

Geography

Global coverage on a Climate Modeling Grid (CMG).