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GCIP/NESOB-97 Land Characterization: NOAA/NESDIS/ORA Land Surface Team GVI Products


The third generation Global Vegetation Index (GVI) weekly composite data are produced operationally by NOAA/NESDIS and includes conversion of counts to reflectances and brightness temperatures using the post-launch calibration and non-linearity correction coefficients. Cloud flags are generated and appended to each map cell. The GVI dataset represents a sample of Global Area Coverage (GAC) observations mapped into 0.144 degree resolution maps in equal-angle projection (Plate Carree). A 7-day composite is a mosaic of observations produced by retaining data for each map cell corresponding to the maximum difference between AVHRR channels 2 and 1. Normalized Difference Vegetation Index (NDVI) is calculated from AVHRR channel 2 and 1 reflectances using the following formula: NDVI = (CH2 - CH1) / (CH2 + CH1)

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Related projects
Spatial Type grid
Frequency other
Language English
GCMD Science Keywords Expand keywords
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Temporal coverage

Begin datetime 1997-04-01 00:00:00
End datetime 1998-03-01 23:59:59

Spatial coverage

Map data from IBCSO, IBCAO, and Global Topography.

Maximum (North) Latitude: 50.00, Minimum (South) Latitude: 20.00
Minimum (West) Longitude: -120.00, Maximum (East) Longitude: -50.00

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EOL Data Support <>

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