VJ143D46: VIIRS Valid Observation Quality for Band M5

Daily global data at 30 arc-second (1,000 meter) resolution provides a valid observation quality layer for VIIRS band M5, synthesized from a 16-day retrieval period and weighted to the ninth day. This product is part of the VJ143D suite designed for climate simulation models, containing single data layers for parameters like BRDF/Albedo quality, snow status, and uncertainty. Methodology details are documented in an Algorithm Theoretical Basis Document (ATBD), and known issues are tracked on a dedicated NASA assessment website.

Use Cases

• Assessing data quality for climate model inputs based on the valid observation quality layer.
• Analyzing temporal changes in land surface reflectance using the 16-day composite and daily production cycle.
• Validating downstream products like vegetation indices by understanding observation quality for band M5.
• Incorporating uncertainty and snow status layers from the CMG product suite into surface energy balance studies.

Strengths

• Provides global coverage at a consistent 30 arc-second resolution suitable for climate-scale analysis.
• Daily production with a 16-day temporal composite improves signal-to-noise ratio for stable retrievals.
• Cross-platform presence on NASA and government portals indicates established importance and peer review.
• Algorithm improvements include enhanced calibration and geolocation accuracy for the entire NOAA-20 mission.

Limitations

• Metadata completeness is medium; specific column names, row counts, and file sizes are not provided across sources.
• License is ambiguously listed as 'other-license-specified' without explicit terms.
• Each large file contains only one data layer, requiring multiple files for a full parameter set.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Satellite remote sensing from the NOAA-20 VIIRS instrument, processed through the VJ143 algorithm.

Time Range

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

Freshness

2026-03-12 20:20:58.511567

Geography

Global