VNP43D89: VIIRS Nadir BRDF-Adjusted Reflectance for Day/Night Band

Daily global Nadir BRDF-Adjusted Reflectance (NBAR) data is produced at a 30 arc-second (1,000 meter) resolution using 16 days of observations from the Suomi NPP VIIRS Day/Night Band. The VNP43D89 product models surface reflectance as if viewed from nadir at local solar noon, correcting for view-angle effects across a global Climate Modeling Grid. This dataset is part of the VNP43D BRDF/Albedo product suite and was decommissioned on July 31, 2025, with users directed to Version 2 products.

Use Cases

• Modeling global surface albedo for climate simulations based on the Climate Modeling Grid (CMG) format.
• Analyzing temporal changes in nighttime light or low-light reflectance from the VIIRS Day/Night Band (DNB).
• Correcting view-angle effects in satellite imagery to produce nadir-equivalent reflectance values for consistent time-series analysis.
• Studying surface anisotropy and BRDF characteristics using the multi-band NBAR product suite.

Strengths

• Provides global coverage on a Climate Modeling Grid designed for climate simulation models.
• Offers daily temporal resolution synthesized from a 16-day observation window, with data weighted to a central ninth day.
• Cross-platform presence on Data.gov and NASA Earthdata signals its importance and established use in the scientific community.

Limitations

• The dataset is decommissioned (as of July 31, 2025), indicating it is not the current version and users must migrate.
• Known issues exist, including reduced input observations due to an abnormally high aerosol flag in upstream Collection 1 data.
• Metadata for size, row count, and specific columns is unavailable across all sources.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Produced from the NASA/NOAA Suomi NPP satellite's Visible Infrared Imaging Radiometer Suite (VIIRS) sensor.

Time Range

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

Freshness

2026-04-09 20:54:17.096160

Geography

Global