VNP43D83: Daily Nadir-Adjusted Surface Reflectance at 0.555 μm

Daily global Nadir BRDF-Adjusted Reflectance (NBAR) data for the 0.555 μm (green) spectral band is produced from the VIIRS sensor at a 1,000-meter resolution. The VNP43D83 product models surface reflectance as if viewed from directly overhead at local solar noon, using a 16-day data composite weighted to the ninth day. It is part of a climate modeling grid suite designed for global climate simulations and land surface monitoring.

Use Cases

• Monitoring vegetation health and phenology based on corrected green-band reflectance.
• Inputting surface reflectance into climate simulation models using the Climate Modeling Grid (CMG) format.
• Studying land surface anisotropy and albedo by using the BRDF-adjusted nadir reflectance values.
• Assessing aerosol impacts on surface reflectance using the corrected aerosol quantity flags over bright surfaces.

Strengths

• Provides daily, global coverage at a consistent 1,000-meter (30 arc-second) spatial resolution.
• Data is corrected for view-angle effects using a documented BRDF algorithm, standardizing measurements to a nadir view.
• Product improvements include enhanced calibration coefficients and geolocation accuracy for the entire Suomi NPP mission.

Limitations

• Metadata completeness is low: specific column names, row counts, and file sizes are not provided on any platform.
• The dataset's temporal coverage is not explicitly stated, only the 16-day composite production method.
• Each file contains only one data layer due to large file sizes, which may complicate multi-band analysis.

Provenance

Source

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

Collection Method

Produced daily from 16 days of Visible Infrared Imaging Radiometer Suite (VIIRS) data, using the NBAR algorithm.

Freshness

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

Geography

Global coverage.