NOAA-14 AVHRR Daily Global Surface Reflectance at 0.05 Degree Resolution

Surface reflectance data from the NOAA-14 satellite provides a daily, atmospherically corrected global land record at 0.05-degree resolution. The Long-Term Data Record project by NASA LAADS generates this product using BRDF-corrected reflectance from the GIMMS Advanced Processing System. It serves as a fundamental climate data record bridging historical AVHRR observations with modern MODIS and VIIRS missions.

Use Cases

• Calculating daily Normalized Difference Vegetation Index (NDVI) from atmospherically corrected surface reflectance in bands 1 and 2.
• Analyzing BRDF-corrected surface reflectance trends for bands 1, 2, and 3 to monitor land surface albedo.
• Using solar zenith, view zenith, and relative azimuth angle data to model bidirectional reflectance effects.
• Incorporating thermal data from bands 3, 4, and 5 for combined surface temperature and reflectance analysis.
• Applying data Quality flags to filter pixels for reliable long-term climate trend studies.

Strengths

• Provides a fundamental climate data record bridging eight AVHRR missions from NOAA-7 to MetOp-B.
• Includes BRDF-corrected surface reflectance for three spectral bands, improving data consistency.
• Delivers daily global coverage at a 0.05-degree (approximately 5 km) spatial resolution.

Limitations

• Specific row count, temporal coverage start/end dates, and sample size for NOAA-14 are unknown.
• Leaf-Area Index/fPAR product is noted as experimental, indicating potential validation gaps.
• Data is stored in HDF4 format, which may require specialized libraries for access and processing.

Provenance

Source

NASA LAADS Long-Term Data Record (LTDR) project.

Collection Method

Generated from GIMMS Advanced Processing System (GAPS) BRDF-corrected Surface Reflectance product (AVH01C1).

Time Range

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Freshness

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Geography

Global land coverage.