VNP43D34: VIIRS Shortwave BRDF Isotropic Parameter Daily Global 1km

NASA/NOAA Suomi NPP VIIRS VNP43D34 Version 1 provided the Bidirectional Reflectance Distribution Function (BRDF) isotropic model parameter for the shortwave broadband (1.61 μm). This daily Level 3 product was generated at 30 arc-second (1,000 meter) resolution on a global Climate Modeling Grid, using a 16-day data window weighted to the ninth day. The isotropic parameter, alongside volumetric and geometric parameters, was used to derive surface albedo and BRDF values for climate and land surface modeling.

Use Cases

• Modeling surface shortwave albedo based on the BRDF isotropic parameter for the 1.61 μm band.
• Inputting 1km resolution isotropic kernel weights into climate simulation models based on the global Climate Modeling Grid (CMG).
• Analyzing temporal changes in land surface reflectance using the daily product generated from a 16-day rolling window.
• Deriving complete BRDF/Albedo values for the VIIRS shortwave broadband by combining this isotropic parameter with volumetric and geometric parameters.

Strengths

• Provides global coverage on a standardized Climate Modeling Grid (CMG) designed for climate models.
• Offers high spatial resolution (30 arc-second, ~1km) for detailed land surface analysis.
• Maintains daily temporal production using a multi-day window to improve data quality.

Limitations

• This Version 1 product was officially decommissioned on July 31, 2025, and users are directed to newer Version 2 products.
• Metadata is incomplete: specific column names, row counts, and file sizes are not provided across platforms.
• Product quality was affected by known issues in upstream data, specifically an abnormally high aerosol flag activation in the VNP09 Collection 1 product.

Provenance

Source

NASA/NOAA Suomi NPP satellite, Visible Infrared Imaging Radiometer Suite (VIIRS) sensor.

Collection Method

Satellite remote sensing data processed through the VNP43 BRDF/Albedo algorithm.

Time Range

Daily production, using a 16-day data window.

Freshness

2026-04-09 20:53:09.545326

Geography

Global