A ONE-STEP ALGORITHM FOR CORRECTION AND CALIBRATION OF AVHRR LEVEL-1BDATA

NOAA-AVHRR level 1b data have been widely used for environmental resea rch at regional and global scales. There are, however, problems in pre processing level 1b tape data in small systems, including a general la rk of AVHRR-specific software possessing suitable levels of sophistica tion, efficiency, and geographic coverage. This paper describes a one- step preprocessing algorithm which combines simple tape reading with g eometric correction, radiometric correction, and calibration using the auxiliary parameters appended in the level 1b tape as primary input. Our algorithm is fast, memory-efficient, and PC compatible.