摘要
针对如何提高天基光学监视对GEO目标的观测效率,开展了天基光学监视指向策略的研究。首先,对比分析了适合GEO带观测的几种天基光学监视轨道,并选择太阳同步晨昏轨道作为天基光学GEO目标观测轨道;其次,为充分利用光照条件并避免地影对GEO观测造成影响,分析了影响最佳指向角的2个因素———太阳矢量、轨道面法线矢量在地心惯性坐标系赤道面内的夹角和相机的视场角,并推导了最佳指向角的计算模型。最后,结合GEO目标的运动规律,提出了一种适合太阳同步晨昏轨道能够提高GEO目标观测效率的观测策略。
The pointing strategy of the space-based visible surveillance for improving the efficiency of the ob- servation of GEO objects is studied. Firstly, by contrasting with several orbits which are suitable for space- based observation, the helio-synchronous dawn-dusk orbit is selected to observe the GEO objects. Secondly, in order to get better light condition and avoid the effect of the umbra, it analyzes the two factors, affecting the pointing angle of the camera, which are the angles between the sun vector and normal vector of the orbit plane in the equator plane of the geocentric equatorial coordinate reference frame and the camera FOV. And then it induces the calculation method of the best camera pointing angle. Finally, by combining with the distribution of the GEO objects, a space-based visible camera pointing strategy is presented, which can im- prove the efficiency of the GEO objects observation.
出处
《航天控制》
CSCD
北大核心
2011年第6期39-43,共5页
Aerospace Control
基金
国家高技术发展计划
关键词
地球同步轨道
天基光学空间监视
指向角
指向策略
Geosynchronous Earth orbit
Space-based visible space surveillance
Pointing angle
Pointing strategy
