GCIP/NESOB-97 Land Characterization: NOAA/NESDIS/ORA Land Surface Team GVI Products https://data.eol.ucar.edu/dataset/40.056 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) Identifiers * Local archive identifier: 40.056 Citation National Climatic Data Center (NCDC), NOAA. 2001. GCIP/NESOB-97 Land Characterization: NOAA/NESDIS/ORA Land Surface Team GVI Products. Version 1.0. UCAR/NCAR - Earth Observing Laboratory. https://data.eol.ucar.edu/dataset/40.056 Accessed 29 Mar 2024. If you plan to cite this dataset in a publication, please email us at: datahelp@eol.ucar.edu We may be able to provide an updated citation that includes a DOI. Acknowledgement In addition to the citation reference and any other acknowledgements, please acknowledge NCAR/EOL in your publications with text such as: Data provided by NCAR/EOL under the sponsorship of the National Science Foundation. https://data.eol.ucar.edu/ Related projects * GCIP/NESOB-97: ARM/GCIP Near-Surface Observation Data Set - 1997 https://data.eol.ucar.edu/project?GCIP%2FNESOB-97 Additional information * Spatial Type: grid * Frequency: other * Language: English Categories * Land Character Platforms * NOAA POES Instruments * Advanced Very High Resolution Radiometer - AVHRR GCMD Science Keywords * EARTH SCIENCE > BIOSPHERE > VEGETATION > VEGETATION INDEX > NORMALIZED DIFFERENCE VEGETATION INDEX (NDVI) * EARTH SCIENCE > LAND SURFACE > LAND USE/LAND COVER > LAND USE/LAND COVER CLASSIFICATION > VEGETATION INDEX > NORMALIZED DIFFERENCE VEGETATION INDEX (NDVI) Related links * download: http://orbit-net.nesdis.noaa.gov/crad/sat/surf/html/avhrr.html Temporal coverage * Begin datetime: 1997-04-01 00:00:00 * End datetime: 1998-03-01 23:59:59 Spatial coverage * Maximum (North) Latitude: 50.00 * Minimum (South) Latitude: 20.00 * Minimum (West) Longitude: -120.00 * Maximum (East) Longitude: -50.00 Primary contact information * pointOfContact: EOL Data Support https://data.eol.ucar.edu/contact/show/1 Additional contact information * originator: National Climatic Data Center (NCDC), NOAA https://data.eol.ucar.edu/contact/show/446 Alternate metadata formats * DataCite: https://data.eol.ucar.edu/dataset/40.056?format=datacite * ISO/TC 211: https://data.eol.ucar.edu/dataset/40.056?format=isotc211