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Processing long time satellite data for global change research: the AVHRR Pathfinder challenge

Global Area Coverage (GAG) measurements from the Advanced Very High Resolution Radiometer (AVHRR) are being reprocessed as a part of the NOAA/NASA Pathfinder program using the best methods available. The data being processed spans over a period of 12 years, and the final product is superior to its precursor datasets. The salient features of the dataset are described along with the processing algorithms.