VNP43D52: Daily Global Snow Status for Climate Modeling

Global daily snow status data is derived from the Suomi NPP VIIRS instrument at 30 arc-second (1,000 meter) resolution. Each pixel is classified as either 'Snow-free Albedo Retrieved' or 'Snow Albedo Retrieved' for a 16-day acquisition period, temporally weighted to the ninth day. The product is part of the BRDF/Albedo suite formatted for a Climate Modeling Grid (CMG) to support climate simulation models.

Use Cases

• Modeling surface energy balance based on snow albedo retrievals.
• Tracking seasonal snow cover dynamics based on daily global classifications.
• Assessing climate model inputs based on the Climate Modeling Grid (CMG) format.
• Validating snow detection algorithms based on the 'Snow Albedo Retrieved' quality flag.

Strengths

• Provides daily global coverage at a consistent 30 arc-second resolution.
• Data is temporally composited from a 16-day window to reduce gaps, weighted to a central date.
• Cross-platform presence on Data.gov and NASA EarthData signals its importance and curation.
• Algorithm improvements noted, including better calibration coefficients and geolocation accuracy.

Limitations

• Column names and specific data structure are not provided in any source description.
• Metadata completeness is inconsistent across platforms (e.g., missing license, author, and size details on some).
• Known issues exist, requiring users to consult an external quality assessment website for full details.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Produced from the Suomi NPP Visible Infrared Imaging Radiometer Suite (VIIRS) sensor data.

Time Range

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

Freshness

2026-04-09 21:16:41.522652

Geography

Global