AVHRR 10-day Mosaic Composite Image Data Sets for Asian Region

The 10-day AVHRR composite image data sets for Asian region have been generated from the daytime AVHRR HPRT data received at Tokyo, Kuroshima, Ulaanbaatar and Bangkok. A Global AVHRR Image Compositing System (GAVICS) developed by Iwate University, Japan, was applied to the image processing. The GAVICS is an automatic processing system that produces single or composite AVHRR data from the raw HPRT data. The image processing chain for Asian data sets includes radiometric calibration, geometric registration, image compositing using the optimal pixels extracted from different passes and atmospheric correction. Each 10-day composite data set is consisted of 13 layers which include NDVI and SST, reflectance of channels 1 and 2, albedos of channels 1 and 2, brightness temperatures of channels 3, 4 and 5, suntarget-sensor geometry of the sensor zenith, the solar zenith and the relative azimuth angles and measurement date of each pixel selected. The datasets for 1998 and 1999 are available.