VNP09GA_NRT: Daily VIIRS Surface Reflectance at 500m and 1km

Global satellite data provides daily estimates of surface reflectance from the Suomi NPP/VIIRS instrument at 500-meter and 1-kilometer resolutions. The Level-2G product is processed on a 10km x 10km tile grid, correcting top-of-atmosphere reflectance for atmospheric gases and aerosols. It is produced for daytime conditions over land surfaces, excluding night and ocean pixels.

Use Cases

• Monitoring vegetation health and phenology based on corrected surface reflectance in multiple spectral bands.
• Analyzing land surface albedo and radiative properties using atmospherically corrected reflectance values.
• Assessing land cover change over time using daily, globally-tiled observations.
• Inputting corrected reflectance data into models for surface temperature or evapotranspiration estimation.

Strengths

• Provides near-real-time (NRT) data, enabling timely analysis.
• Offers global coverage on a consistent tile grid compatible with MODIS.
• Includes atmospheric correction for multiple gases and aerosols, improving data accuracy.

Limitations

• Metadata completeness is low; specific column names, row counts, and file sizes are unknown.
• Data is produced only for daytime conditions and excludes ocean and night pixels.
• The license is ambiguously listed as 'other-license-specified' without details.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Satellite observations from the Suomi NPP/VIIRS instrument, processed with atmospheric correction algorithms.

Freshness

2026-04-09 23:35:05.150263

Geography

Global