VJ143D30: VIIRS BRDF Geometric Parameter for Visible Broadband

NOAA-20 VIIRS VJ143D30 provides the Bidirectional Reflectance Distribution Function (BRDF) geometric model parameter for the visible broadband (0.64 μm). This daily product is derived from 16 days of satellite data at a 30 arc-second (1,000 meter) resolution, temporally weighted to the ninth day, and formatted on a global Climate Modeling Grid (CMG). The geometric parameter, along with isotropic and volumetric parameters, is used to calculate BRDF and albedo values for the visible band.

Use Cases

• Deriving land surface albedo values for the visible broadband based on the geometric BRDF parameter.
• Inputting surface anisotropy data into climate simulation models based on the global CMG format.
• Analyzing temporal changes in surface reflectance using the daily, 16-day composite product.
• Integrating model parameters for the VIIRS Day/Night Band (DNB) alongside standard spectral bands.

Strengths

• Provides a specific geometric parameter for the VIIRS visible broadband (0.64 μm), a key component for albedo calculation.
• Offers global coverage on a Climate Modeling Grid (CMG) designed for direct use in climate models.
• Incorporates algorithm improvements from the S-NPP VIIRS V002 version, including improved calibration and geolocation.

Limitations

• Column names and exact data structure are not provided in the source metadata.
• Dataset size and row counts are unknown across all platforms.
• Each large file contains only one data layer, which may complicate simultaneous analysis of multiple parameters.

Provenance

Source

NOAA-20 Visible Infrared Imaging Radiometer Suite (VIIRS) satellite.

Collection Method

Daily production using 16 days of data, temporally weighted to the ninth day.

Time Range

Daily production suggests a continuous time series, but a specific start date is not provided.

Freshness

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

Geography

Global coverage.