摘要
根据傅里叶光学中调制传递函数的理论分析了可见、红外自旋扫描辐射计(VISSR)成像光学系统的性质,并提出调焦的判据和方法。利用快速傅里叶变换(FFT)对卫星数字云图进行频谱分析,并给出了该方法的实验和结果。接收日本CMS-4卫星展宽数字云图的试验表明,本方法可以作为静止气象卫星VISSR在轨调焦的实用方法。
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.
出处
《红外与毫米波学报》
SCIE
EI
CAS
CSCD
北大核心
1993年第4期261-264,共4页
Journal of Infrared and Millimeter Waves
关键词
气象卫星
VISSR
调焦
同步卫星
geostationary meteorological satellite, VISSR (visible-infrared spin scan radiometer), focusing control.
