N09_AVH09C1: NOAA-9 AVHRR Daily Surface Reflectance at 0.05 Degrees

NOAA-09 AVHRR Atmospherically Corrected Surface Reflectance Daily L3 Global 0.05 Deg. CMG is a satellite-derived data product from the Long-Term Data Record (LTDR) project. It provides daily, global land surface reflectance data corrected for atmospheric effects and bidirectional reflectance distribution function (BRDF). The dataset is produced by the National Aeronautics and Space Administration and was last updated on March 12, 2026.

Use Cases

• Monitoring vegetation health and phenology based on the derived Normalized Differential Vegetation Index (NDVI).
• Analyzing land surface albedo and radiative properties based on atmospherically corrected surface reflectance for bands 1, 2, and 3.
• Studying climate change impacts on global ecosystems using the long-term, multi-mission data record.
• Modeling leaf-area index and fraction of absorbed photosynthetically active radiation (LAI/fPAR) as an experimental product.

Strengths

• Integrates data from eight AVHRR missions, including NOAA-7 through NOAA-19 and MetOp-B, creating a long-term record.
• Provides multiple derived products: daily surface reflectance, NDVI, and an experimental LAI/fPAR product.
• Includes ancillary data such as quality flags, solar/view angles, and thermal band data for bands 3, 4, and 5.

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.
• The LAI/fPAR product is described as experimental, indicating potential variability in validation.

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Generated from GIMMS Advanced Processing System (GAPS) BRDF-corrected Surface Reflectance product (AVH01C1) using mature and well-tested algorithms.

Time Range

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

Freshness

Last updated 2026-03-12 23:15:37.387658; freshness should be verified.

Geography

Global coverage at 0.05-degree resolution.