VJ143IA4N: Daily Nadir BRDF-Adjusted Reflectance at 500m

Daily near-real-time data from the VIIRS/JPSS1 satellite provides Nadir BRDF-Adjusted Reflectance (NBAR) at a 500-meter resolution. The product uses a 16-day rolling window of VIIRS data and the RTLSR BRDF model to correct view angle effects, producing stable reflectance and albedo estimates. It includes six Science Dataset layers for quality and nadir reflectance across VIIRS imagery bands I1, I2, and I3.

Use Cases

• Monitoring land surface albedo changes for climate models based on the black-sky and white-sky albedo layers.
• Analyzing surface anisotropy and reflectance stability over time using the BRDF-adjusted nadir reflectance.
• Estimating instantaneous actual (blue-sky) albedo under specific solar angles using the provided polynomial method with BSA and WSA layers.
• Studying vegetation or land cover phenology with corrected, angle-independent reflectance in the I1, I2, and I3 bands.

Strengths

• Provides daily, near-real-time global coverage at a consistent 500-meter spatial resolution.
• Applies a sophisticated RTLSR BRDF model to correct for view-angle effects, producing stable NBAR.
• Includes derived albedo products (BSA and WSA) enabling estimation of albedo at any solar illumination angle.

Limitations

• Key metadata such as specific column names, dataset size, and row counts are not provided by any source.
• The 'last updated' date of 2026-04-09 appears to be a future date, indicating a potential metadata error or conflict.
• Relies on a 16-day composite window for daily product generation, which may smooth over very rapid surface changes.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Satellite remote sensing data from the VIIRS/JPSS1 sensor, processed using the RTLSR BRDF model algorithm.

Time Range

Daily coverage (near-real-time), utilizing a rolling 16-day data window.

Freshness

2026-04-09 20:47:32.155840

Geography

Global coverage on a 500 m SIN Grid.