VJ109A1: NOAA-20 VIIRS Land Surface Reflectance

Global land surface reflectance data is provided by the NOAA-20 satellite's Visible Infrared Imaging Radiometer Suite (VIIRS) sensor. The dataset offers nine atmospheric-corrected spectral bands at a nominal 1-kilometer resolution, composited from the best observations over 8-day periods. Additional layers include quality assurance flags and geometric angles for each pixel.

Use Cases

• Monitoring vegetation health based on nine corrected reflectance bands (M1-M5, M7, M8, M10, M11)
• Analyzing land surface changes over time using the 8-day compositing period and day-of-year layer
• Assessing data quality for downstream products using reflectance band quality and state QA layers
• Modeling surface reflectance anisotropy using relative azimuth, sensor zenith, and solar zenith angles

Strengths

• Data is corrected for atmospheric gases and aerosols, improving surface signal accuracy
• Each pixel is selected based on high coverage, low sensor angle, and absence of clouds
• Version 2 includes improved calibration, geolocation, and aerosol flag corrections

Limitations

• Column names and dataset size (rows, file size) are not provided on any platform
• License is ambiguously specified as 'other-license-specified' without details
• Known issues exist, requiring users to consult external quality assessment websites

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Derived through resampling of Level 2 VIIRS data from the NOAA-20 satellite sensor.

Freshness

2026-04-09 21:03:16.716977

Geography

Global