N07_AVH13C1: Daily Global Vegetation Index from NOAA-7 Satellite

Global daily Normalized Difference Vegetation Index (NDVI) data at a 0.05-degree resolution, derived from atmospherically corrected NOAA-7 AVHRR satellite imagery. The dataset is part of the Long-Term Data Record (LTDR) project, which bridges data from multiple polar-orbiting satellite missions to create a climate data record. It is produced by the National Aeronautics and Space Administration and was last updated on March 12, 2026.

Use Cases

• Monitoring global vegetation health and phenology based on daily NDVI values.
• Studying long-term climate change impacts on land surface based on the LTDR climate data record.
• Calibrating or validating vegetation models using atmospherically corrected surface reflectance data.
• Analyzing land use and land cover changes at a global scale based on satellite-derived indices.

Strengths

• Data is atmospherically corrected, which likely improves accuracy for surface analysis.
• Part of a long-term record bridging data from eight AVHRR missions, MODIS, and VIIRS.
• Provides daily global coverage at a 0.05-degree spatial resolution.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Data is available in HDF4 format, which may require specialized tools for processing.
• Row count is unknown, which may limit suitability assessment.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Generated from GIMMS Advanced Processing System (GAPS) BRDF-corrected Surface Reflectance product derived from NOAA-7 AVHRR satellite data.

Time Range

Covers the operational period of the NOAA-7 satellite; specific dates are not provided.

Freshness

Last updated 2026-03-12 23:18:15.089038; freshness should be verified.

Geography

Global