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LTDR is a NASA-funded REASoN project to produce a consistent long term data set from AVHRR and MODIS instruments for climate studies. The project will create daily surface reflectance and NDVI products at a resolution of 0.05 degrees. Higher order products such as LAI/FPAR, burned area, albedo, and BRDF will be created at monthly temporal resolution. The LTDR project will reprocess data from AVHRR sensors onboard NOAA satellites from 1981 - present by applying the preprocessing improvements identified in the AVHRR Pathfinder II project and the atmospheric and BRDF corrections used in MODIS preprocessing. The LTDR project will compare the AVHRR results with MODIS products where the two instruments overlap in time (from 2000 on for MODIS Terra and mid-2002 for MODIS Aqua). This Land Long Term Data Record will lay the foundation for continued climate monitoring with the VIIRS instruments onboard the NPP and NPOESS satellites. |
