提高航天传输型CCD相机地面像元分辨率方法研究  

A Method for Improving GSD of Space Real - time Transmission CCD Camera

作　　者：周峰[1] 乌崇德[1] 

机构地区：[1]北京空间机电研究所,北京100076

出　　处：《航天返回与遥感》2002年第3期35-42,共8页Spacecraft Recovery & Remote Sensing

摘　　要：文章首先对空间传输型遥感相机提高像元分辨率的几种常规和非常规方法做了简介,在分析这些方法的优缺点以及以采样定理为依据分析我国现有CCD相机光学截止频率和CCD采样频率存在的矛盾的基础上探讨了高模式采样技术和超模式采样技术,经过比较这两种采样模式,认为超模式采样技术更具有工程可行性和优越性。然后对超模式采样计算机图像仿真结果进行了分析。In the paper, several conventional and unconventional methods for improving ground sampling distance (GSD) of space CCD camera are introduced briefly. On the base of analyzing merits and disadvantages of these methods and incompatibility between optical cut - off frequency and CCD sampling frequency of CCD camera according to the theorem , hipermode sampling and supermode sampling are brought forward. After these two sampling methods are compared, the supermode sampling is thought to be more feasible and advantageous. Then digital image simulation results and analysis have been presented for supermode sampling.

关 键 词：像元分辨率 CCD相机 超模式采样 航天设备 

分 类 号：V445.8[航空宇航科学与技术—飞行器设计]