VJ143D89: VIIRS Nadir BRDF-Adjusted Reflectance for Day/Night Band

NOAA-20 VIIRS satellite data provides Nadir BRDF-Adjusted Reflectance (NBAR) for the Day/Night Band at a 1-kilometer resolution. This daily product uses a 16-day temporal composite weighted to the ninth day and is formatted on a global Climate Modeling Grid. NBAR values model surface reflectance as if viewed from nadir at local solar noon, removing view angle effects for consistent analysis.

Use Cases

• Climate simulation modeling based on the global Climate Modeling Grid (CMG) format
• Analyzing surface reflectance anisotropy using Bidirectional Reflectance Distribution Function (BRDF) corrections
• Monitoring global land surface albedo trends from the VIIRS Day/Night Band (DNB) NBAR values
• Studying aerosol impacts on reflectance retrievals over bright surfaces like deserts

Strengths

• Provides a daily product with a consistent 30 arc-second (1,000 meter) spatial resolution
• Includes algorithmic improvements from the S-NPP VIIRS V002 version, such as better calibration coefficients and geolocation accuracy
• Covers the entire globe on a Climate Modeling Grid designed for climate simulations

Limitations

• Each file contains only one data layer due to large file sizes, limiting immediate multi-band analysis
• Metadata completeness is inconsistent across platforms; specific column names, row counts, and file sizes are unknown
• Known issues exist and require referral to an external MODIS/VIIRS Land Quality Assessment website for full details

Provenance

Source

LPCLOUD

Collection Method

Produced daily from NOAA-20 Visible Infrared Imaging Radiometer Suite (VIIRS) satellite data.

Freshness

2026-04-09 21:07:25.700299

Geography

Global