Based on the theory of MTF in optics, the features of VISSR optical imaging system are analyzed. A criterion and a method for VISSR focusing are proposed and the experiment and the results for the frequency analysis method using FFT through receiving stretcher digital images of the Japaness GMS-4 satellite are given. The tests show that the method developed in this paper would be useful and practical for VISSR focusing control of the geostationary meteorological satellite on the orbit.
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朱广赜 魏彩英.静止气象卫星VISSR在轨调焦的一种方法[J].红外与毫米波学报,1993,12(4):261~264]. ZHU GUANGZE, WEI CAIYING. A METHOD OF FOCUSING CONTROL FOR VISSR OF THE GEOSTATIONARY METEOROLOGICAL SATELLITE ON THE ORBIT[J]. J. Infrared Millim. Waves,1993,12(4):261~264.]