VJ143D84: VIIRS Nadir BRDF-Adjusted Reflectance for Band M5

NOAA-20 VIIRS VJ143D84 provides Nadir BRDF-Adjusted Reflectance (NBAR) for the M5 band (0.672 μm) daily at a 30 arc-second (1,000 meter) resolution. The data are produced using a 16-day temporal window weighted to the ninth day and are formatted on a global Climate Modeling Grid (CMG). The NBAR algorithm removes view angle effects to model reflectance as if collected from a nadir view at local solar noon.

Use Cases

• Climate simulation modeling based on the global Climate Modeling Grid (CMG) format.
• Analyzing land surface reflectance anisotropy using the BRDF-adjusted NBAR values.
• Monitoring vegetation or surface changes using the specific M5 band (0.672 μm) reflectance.
• Assessing aerosol impacts on surface reflectance using the corrected aerosol quantity flag.

Strengths

• Provides global coverage on a Climate Modeling Grid (CMG) suitable for climate models.
• Includes algorithmic improvements such as better calibration coefficients and corrected aerosol flags.
• Offers daily temporal resolution synthesized from a 16-day data window.

Limitations

• Metadata completeness is low; specific column names, row counts, and file sizes are unknown.
• Each product file contains only one data layer, which may limit simultaneous multi-band analysis.
• Known issues exist, requiring users to consult an external website for details.

Provenance

Source

LPCLOUD (listed on nasa_earthdata).

Collection Method

Produced daily from NOAA-20 VIIRS sensor data using a BRDF/Albedo algorithm.

Time Range

Daily production suggests continuous coverage from the NOAA-20 mission start date, but the exact range is not specified.

Freshness

Last updated on 2026-04-09 according to two platforms.

Geography

Global.