敏捷模式下卫星成像条件变化研究  

Research on Change of Satellite Imaging Conditions Working in Agile Imaging Mode

作　　者：韩杏子[1] 董小静[1] 朱军[1] 

机构地区：[1]航天东方红卫星有限公司,北京100094

出　　处：《光学学报》2014年第B12期8-14,共7页Acta Optica Sinica

摘　　要：目前我国大多数卫星在轨均采用推扫成像方式，成像过程中太阳高度角、太阳方位角及卫星观测角相对固定，相机入瞳辐亮度变化较小，同一次成像过程中，相机参数可不做调节。敏捷卫星具有强大的姿态机动能力，可实现多种成像模式，如多个点目标成像、立体成像以及条带拼接成像等。在敏捷卫星特殊的成像模式下，由于观测目标分布位置变化较大，卫星姿态变化较为剧烈，因此相机成像条件也会发生改变。针对多点目标成像模式以及立体成像模式，建模得到目标到达相机入瞳处的辐亮度，对敏捷模式下相机入瞳辐亮度的变化情况进行了仿真分析，提出敏捷成像模式下成像参数设置原则。Most satellites in orbit get image in the way of pushing broom, during which angles of solar elevation, solar azimuth, satellite elevation and satellite azimuth remain stable. Thus camera′s pupil radiance doesn′t change. Imaging parameters can be the same during one mission. Agile satellite can realize several imaging modes because of its advanced attitude adjusting ability, such as multi-point targets imaging mode, stereo imaging mode and strips mosaic imaging mode. Working in agile imaging modes, imaging conditions will change tempestuously, because targets will distribute in different locations, and satellite′s attitude will change sharply. We focus on analyzing imaging angles and camera′s pupil radiance change in multi-point targets imaging mode and stereo imaging mode, and imaging parameters′ setting principle in agile imaging mode is proposed.

关 键 词：探测器 敏捷卫星 成像条件 辐亮度 

分 类 号：V448.22[航空宇航科学与技术—飞行器设计]