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GVF Data History

The GVPS has the capability to process Global Vegetation Fraction (GVF) product since 1981. The input GVI2 data were observed by several NOAA polar satellites. GVPS system chose the most optimal satellite input for each period based on data quality and availability to provide a continuous set of global vegetation products. Satellites and periods of data used in GVPS are as following:

 

  • NOAA-7: week 35 of 1981 ~ week 14 of 1985;
  • NOAA-9: week 15 of 1985 ~ week 44 of 1988, and week 37 of 1994 ~ week 6 of 1995 (when NOAA-11 data are not reliable);
  • NOAA-11: week 45 of 1988 ~ week 36 of 1994;
  • NOAA-14: week 7 of 1995 ~ week 52 of 2000;
  • NOAA-16: week 1 of 2001 ~ week 22 of 2005;
  • NOAA-17: week 12 of 2004 ~ present (Only a few weeks data were used when NOAA-16 data are not available);
  • NOAA-18: week 23 of 2005 ~ present