VIIRS VJ143MA4: Daily Nadir BRDF-Adjusted Reflectance at 1km

Daily global data from the NOAA-20 VIIRS sensor provides surface reflectance corrected for view-angle effects at a 1-kilometer resolution. The product uses a 16-day data window, weighted to the 9th day, and applies the RossThick/Li-Sparse-Reciprocal BRDF model to generate stable, nadir-adjusted reflectance for nine spectral bands. It includes 18 science dataset layers for quality assessment, nadir reflectance, and derived albedo measures, supporting continuity with NASA's MODIS BRDF/Albedo product suite.

Use Cases

• Monitoring land surface albedo trends based on the black-sky and white-sky albedo science dataset layers.
• Correcting satellite imagery for anisotropic effects using the provided BRDF model parameters for consistent multi-temporal analysis.
• Estimating instantaneous actual (blue-sky) albedo by combining the black-sky and white-sky albedo layers with a simple polynomial.
• Continuity studies of surface reflectance by comparing this VIIRS NBAR product with legacy MODIS BRDF/Albedo data.

Strengths

• Provides daily, global coverage at 1km spatial resolution, enabling frequent monitoring.
• Corrects for view-angle effects using a well-established RTLSR BRDF model, promoting data consistency.
• Includes 18 science dataset layers for comprehensive quality assessment and reflectance/albedo outputs.
• Designed for continuity with the long-term MODIS BRDF/Albedo product suite, supporting time-series analysis.

Limitations

• Key metadata such as exact row/column count, specific column names, and dataset size are not provided across any source.
• The license is ambiguously listed as 'other-license-specified' without explicit terms.
• Spatial resolution of 1km may be too coarse for applications requiring fine-scale land surface detail.

Provenance

Source

NOAA-20 Visible Infrared Imaging Radiometer Suite (VIIRS) sensor, processed by LPCLOUD.

Collection Method

Satellite remote sensing data processed using the VJ143 algorithm to apply BRDF adjustments.

Time Range

Daily production, utilizing a rolling 16-day data window.

Freshness

2026-04-09 20:50:51.475732

Geography

Global coverage on a 1km sinusoidal grid.