The third generation polar Global Vegetation Index (GVI) products are used for monitoring the density and vigor of green vegetation. Useful applications of GVI products include classifying land cover, estimating crop acreage, and detecting plant stress. The GVI operational products are weekly composites, and have a resolution of about 16 km. A comprehensive description of GVI products may be found at the national Climatic Data Center's NOAA GVI Guide.
Available operational products are:
• Normalized Difference Vegetation Index (NDVI): a calculation of the differences between AVHRR channels 1 and 2
• Fractional Vegetation: NDVI displayed as a fraction
• Precipitable Water Index: a measurement of how much water vapor is in the atmosphere
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Satellite: Resolution: Frequency: |
POES 16 Km Daily and Weekly |
The Global Vegetation Processing System (GVPS) shows weekly composite vegetation and drought monitoring indices. The operational products are:
• Smoothed NDVI
• Green Vegetation Fraction (GVF)
Drought monitoring indices are secondary products, which include Vegetation Condition Index, Temperature Condition Index, and Vegetation Temperature Index. These products are composited over 7-day period to minimize the cloud contamination and reduce the atmospheric effects.
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Satellite: Resolution: Frequency: |
POES 16 Km Weekly |
The MGVI product is used for monitoring the density and vigor of green vegetation. Useful applications of GVI products include classifying land cover, estimating crop acreage, and detecting plant stress. The weekly composite Metop Global Vegetation Index (MGVI) is derived from MetOp AVHRR global 1km FRAC data. When the daily map is created, the most nadir pixel is selected. The weekly composite product is created from daily maps of 7 days on pixel basis by selecting the data of the day with Maximum NDVI. The operational product is:
• Normalized Difference Vegetation Index (NDVI)
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Satellite: Resolution: Frequency: |
POES 16 Km Daily and Weekly |
Questions or Comments?
Contact: Hanjun Ding (Hanjun.Ding@noaa.gov)
