NOAA-19 AVHRR: Daily Global Vegetation Index at 0.05-Degree Resolution

NOAA-19 AVHRR Atmospherically Corrected Normalized Difference Vegetation Index (NDVI) Daily L3 Global 0.05 Deg. CMG is a satellite-derived data product from the Long-Term Data Record (LTDR) project. The National Aeronautics and Space Administration produces this thematic climate data record to study global climate change by bridging data from multiple polar-orbiting satellite missions. It is generated from GIMMS Advanced Processing System BRDF-corrected Surface Reflectance and is available in HDF4 format.

Use Cases

• Monitor global vegetation health and phenology based on daily NDVI values.
• Study climate change impacts on land cover using a long-term satellite data record.
• Validate and calibrate other satellite-derived vegetation products based on the LTDR's bridge between AVHRR, MODIS, and VIIRS missions.
• Model carbon cycle dynamics based on vegetation index data linked to LAI/fPAR products.

Strengths

• Part of a critical Long-Term Data Record (CDR) for studying global climate change.
• Derived from atmospherically corrected surface reflectance using mature and well-tested algorithms.
• Serves as a bridge connecting data from eight AVHRR missions, MODIS, and VIIRS sensors.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count and dataset size are 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 (N19_AVH01C1) derived from NOAA-19 AVHRR satellite data.

Time Range

Daily data, part of a long-term record connecting past to present missions.

Freshness

Last updated 2026-03-12 23:14:03.982221; freshness should be verified.

Geography

Global coverage at 0.05-degree resolution.