VJ143IA3N: Daily Global Land Surface Albedo at 500m

VIIRS/JPSS1 Albedo Daily L3 Global 500 m SIN Grid NRT data provides daily estimates of black-sky and white-sky albedo for land surfaces. The product is generated using a 16-day rolling window of VIIRS observations and the RossThick/Li-Sparse-Reciprocal BRDF model to correct for surface anisotropy. It contains 9 Science Dataset layers, including albedo values and quality flags for specific imagery bands.

Use Cases

• Modeling surface energy balance based on daily albedo estimates.
• Studying seasonal vegetation changes using the time-series of white-sky albedo.
• Correcting atmospheric models with anisotropic reflectance parameters from the BRDF model.
• Estimating instantaneous 'blue-sky' albedo by combining the provided black-sky and white-sky albedo layers.

Strengths

• Provides daily, near-real-time global coverage at a 500-meter spatial resolution.
• Uses a sophisticated, documented RTLSR BRDF model to correct for surface anisotropic effects.
• Contains multiple derived albedo measures (BSA, WSA) enabling flexible analysis.

Limitations

• Metadata for row count, file size, and specific column names is unavailable across all sources.
• Relies on a rolling 16-day composite, meaning daily values are not from a single instantaneous observation.
• The license is listed as 'other-license-specified' without explicit details provided.

Provenance

Source

LANCEMODIS (NASA)

Collection Method

Derived from VIIRS/JPSS1 sensor data using a semi-empirical kernel-driven BRDF algorithm.

Time Range

Daily production, using a 16-day rolling window of observations.

Freshness

2026-04-09 21:08:42.554698

Geography

Global coverage using the Sinusoidal (SIN) grid projection.