VNP43D13: VIIRS BRDF Isotropic Parameter for Band M5

VNP43D13 provides the Bidirectional Reflectance Distribution Function isotropic parameter for the VIIRS band M5 at a 0.672 μm wavelength. This daily, global product is generated at a 30 arc-second (1,000 meter) resolution using a 16-day data window, weighted to the ninth day, and formatted for Climate Modeling Grids. The isotropic parameter is one of three model parameters used to derive land surface albedo and anisotropy values for climate simulation models.

Use Cases

• Deriving land surface albedo for climate models based on the BRDF model parameters.
• Analyzing temporal changes in surface reflectance anisotropy using the daily, 16-day composite data.
• Inputting isotropic radiative parameters into global climate simulation grids.
• Studying the impact of aerosol contamination on BRDF/albedo products, as noted in the known issues.

Strengths

• Provides global coverage at a consistent 30 arc-second (1 km) spatial resolution.
• Offers daily temporal compositing using a 16-day window for temporal stability.
• Is part of a standardized, multi-band product suite (VNP43D01-VNP43D39) from NASA/NOAA.

Limitations

• This Version 1 product was officially decommissioned on July 31, 2025, limiting its use for current analysis.
• Metadata for key attributes like row count, file size, and specific columns is unavailable across all sources.
• The product is affected by known data quality issues related to high aerosol flag activation in upstream collections.

Provenance

Source

National Aeronautics and Space Administration (NASA) / National Oceanic and Atmospheric Administration (NOAA), Suomi NPP satellite.

Collection Method

Produced daily from Visible Infrared Imaging Radiometer Suite (VIIRS) observations, using a BRDF/albedo model.

Time Range

Daily production, but specific start and end dates for Version 1 are not provided.

Freshness

Last updated metadata on 2026-04-09, but the underlying data product is decommissioned.

Geography

Global coverage.