VJ143D29: BRDF Volumetric Parameter for VIIRS Visible Broadband

NOAA-20 VIIRS BRDF/Albedo Model Parameter 2 VIS product (VJ143D29) provides the volumetric parameter for the visible broadband (0.64 μm) used to derive surface reflectance and albedo. It is produced daily from a 16-day rolling window at 30 arc-second (1,000 meter) resolution on a global Climate Modeling Grid. The volumetric parameter, along with isotropic and geometric parameters, enables calculation of Bidirectional Reflectance Distribution Function and albedo values for climate simulation models.

Use Cases

• Deriving land surface albedo for climate models based on the volumetric BRDF parameter.
• Analyzing surface reflectance anisotropy in the visible spectrum using the three model parameters.
• Incorporating daily, globally gridded surface radiative properties into Earth system models.
• Studying temporal changes in surface reflectance using the 16-day rolling composite data.

Strengths

• Provides a specific volumetric parameter for the VIIRS visible broadband (0.64 μm) at 30 arc-second resolution.
• Offers daily global coverage on a Climate Modeling Grid suitable for climate simulations.
• Includes improvements from a previous version, such as improved calibration and geolocation accuracy.

Limitations

• Column names and exact data structure are not provided in the available metadata.
• Each file contains only one data layer due to large file sizes, requiring multiple files for complete analysis.
• The dataset has known issues, requiring users to consult an external website for complete information.

Provenance

Source

LPCLOUD (NASA Earthdata), derived from NOAA-20 VIIRS satellite sensor.

Collection Method

Produced daily using 16 days of VIIRS data, temporally weighted to the ninth day.

Time Range

Daily production with a 16-day rolling composite window.

Freshness

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

Geography

Global coverage on a Climate Modeling Grid (CMG).