VJ143D81: Daily Nadir-Adjusted Reflectance for VIIRS Band M2

Daily global data layers are produced using a 16-day rolling window, temporally weighted to the ninth day. The dataset provides Nadir BRDF-Adjusted Reflectance (NBAR) for the VIIRS Band M2 (0.445 μm) at a 30 arc-second (1,000 meter) resolution on a Climate Modeling Grid. It is part of a product suite designed to remove view-angle effects for consistent, nadir-view reflectance values at local solar noon, intended for climate simulation models.

Use Cases

• Modeling land surface albedo for climate simulations based on the Climate Modeling Grid (CMG) format.
• Analyzing temporal trends in surface reflectance using the daily, 16-day composite data.
• Correcting for bidirectional reflectance effects in satellite imagery for consistent nadir-view comparisons.
• Studying aerosol impacts on surface reflectance using the corrected aerosol quantity flag mentioned in the algorithm improvements.

Strengths

• Provides global coverage on a standardized Climate Modeling Grid.
• Algorithm includes improvements from a previous version, such as better calibration coefficients and geolocation accuracy.
• Data is produced daily with a consistent 16-day temporal compositing method.

Limitations

• Critical metadata is missing or conflicting across sources: row count, column names, and specific license terms are unknown.
• Each product file contains only one data layer, which may complicate multi-band analysis.
• Known issues exist and require external reference to a separate quality assessment website for full details.

Provenance

Source

LPCLOUD, derived from NOAA-20 VIIRS sensor data.

Collection Method

Produced daily using an algorithm that applies Bidirectional Reflectance Distribution Function (BRDF) adjustments to directional reflectances.

Time Range

Daily coverage, using a rolling 16-day window of input data.

Freshness

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

Geography

Global.