GCIP/EOP Land Characterization: NOAA/NESDIS/ORA Land Surface Team GVI Products
Summary
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)
Data access
download: avhrr.htmlAdditional information
Related projects: GCIP/EAOP-98, GCIP/EAOP-99, GCIP/EOP, GCIP/ESOP-95, GCIP/ESOP-96, GCIP/ESOP-97, GCIP/ESOP-98, GCIP/GIST, GCIP/LSA-NW 00, GCIP/LSA-NW 99Observational frequency: other
Spatial type: grid
Categories: Land Character.
Platforms: Wind Profiler, NOAA Demo Net
Temporal coverage
Begin datetime: 1996-04-01 00:00:00, End datetime: 2001-09-30 23:59:59
Spatial coverage
Minimum latitude: 20.000000, Minimum longitude: -120.000000Maximum latitude: 50.000000, Maximum longitude: -50.000000
Point of contact
NCAR/EOLEOL Data Support
E-Mail address: codiac at ucar dot edu
Homepage: http://data.eol.ucar.edu/