VNP43D84: Nadir BRDF-Adjusted Reflectance for VIIRS Band M5

VIIRS/NPP VNP43D84 Version 1 is a decommissioned daily global dataset providing Nadir BRDF-Adjusted Reflectance (NBAR) for the 0.672 μm (M5) spectral band. It is generated from 16 days of observations at a 30 arc-second (1,000 meter) Climate Modeling Grid resolution, temporally weighted to represent the ninth day. This single-layer product is part of a suite designed to remove view-angle effects for climate simulation and land surface monitoring.

Use Cases

• Modeling surface albedo and anisotropy in climate simulations based on the Climate Modeling Grid (CMG) format.
• Monitoring land surface reflectance changes over time using the daily, 16-day composite temporal weighting.
• Analyzing vegetation or surface properties specific to the red spectral band (0.672 μm) from a consistent nadir perspective.
• Comparing surface reflectance across the VIIRS NBAR product suite (bands M1-M5, M7, M8, M10, M11, and DNB).

Strengths

• Provides global coverage at a consistent 30 arc-second (1,000 meter) resolution suitable for climate models.
• Applies a standardized NBAR algorithm to correct for view-angle effects, modeling data as if collected at nadir and solar noon.
• Is part of a cross-platform, well-documented product suite with an Algorithm Theoretical Basis Document (ATBD).

Limitations

• This Version 1 product was officially decommissioned on July 31, 2025, directing users to newer Version 2 products.
• Metadata for row count, file size, and specific columns is unavailable across all sources.
• Known issues exist regarding reduced input observations due to high aerosol flag activation in upstream data, potentially affecting accuracy over arid regions.

Provenance

Source

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

Collection Method

Daily production using a 16-day data composite, applying the BRDF/Albedo NBAR algorithm.

Time Range

null

Freshness

Last updated metadata indicates 2026-04-09, but the product itself is decommissioned.

Geography

Global