遥感卫星传感器的重复观测能力计算  

Algorithm of the Capacity of Repetitive Observation of Remote Sensing Satellite Sensors

作　　者：李子扬[1] 李传荣[1] 胡坚[1] 高彩霞[1] 

机构地区：[1]中国科学院光电研究院,北京100190

出　　处：《空间科学学报》2009年第6期615-619,共5页Chinese Journal of Space Science

基　　金：亚太空间多边合作专题研究"环境光学卫星在亚太组织成员国的适用性分析"项目资助

摘　　要：遥感卫星传感器的重复观测能力是体现卫星系统动态监测能力的重要指标之一.通过分析卫星星下点成像和侧视成像时的重访条件,给出了卫星可能实现重访的轨道计算方法,同时以HJ-1A/1B卫星(环境与灾害监测预报小卫星星座的光学星)为例,给出了特定地区可以实现重访的优选轨道,并讨论了由两颗卫星组成的卫星星座对重访的影响,以及纬度对重访的影响.Capacity of repetitive observation of remote sensing satellite sensors is a key indicator of the system＇s dynamic monitoring ability. In the paper, the algorithm of orbit computing for realizing repetitive observations was presented based on the analysis of repetitive observation conditions under two imaging modes： nadir and side-looking; selective orbits for repetitive observations in particular areas were also described taking the HJ-1A/1B satellites （the optical satellites of the small satellite constellation for environment and disaster monitoring and forecasting） for example. The work is focused on the orbits of HJ-1A/B satellites. Before computation and analysis of the orbits, the Area of Interest （AOI） should be defined. Considering the optical sensors, in this paper, only the orbits from north to south were computed, yet orbits from south to north were passed over. The capacity of repetitive observation is defined as the overlap of two satellite scenes. By analysis of the nadir imaging and the side-looking imaging mode, the paper draws the conclusion of how to choose the best orbit to realize repetitive observation. Finally, impacts of the satellite constellation consisting of two satellites on the repetitive observations as well as that of latitude were discussed.

关 键 词：遥感卫星 重访 重复观测能力 

分 类 号：V474.2[航空宇航科学与技术—飞行器设计]