GEO光学遥感卫星阳光入侵规避方法

Sunlight Invation Avoidance Method of GEO Optical Remote Sensing Satellite

地球静止轨道(GEO)光学遥感卫星的相机每天午夜时分存在阳光入侵问题,致使相机焦面存在潜在损伤,严重时将影响卫星的使用寿命。文章调研了国内外GEO光学遥感卫星针对此问题的解决方式,在综合考虑相机、电能、机动、热控、测控等各项影响因素之后,提出了一种应用约束规避算法的阳光入侵规避方法,首先将卫星设计的工程约束条件转换为空间几何约束条件,通过将明确约束参数后的算法引入卫星姿态控制器来调整卫星姿态指向,避免阳光入侵相机内部。典型工况的仿真分析结果表明:在规避过程中,相机光轴矢量与阳光入射矢量夹角满足约束条件,此方法有效,可满足卫星在轨应用。

For GEO （geostationary orbit） optical remote sensing satellite exists a problem of sunlight invasion to satellite camera near midnight daily,which would bring in a potential damage of camera focal plane and affect the lifetime of the satellite.The paper makes an investigation of the solutions to this problem,and proposes a sunlight invation avoidance method based on constraint avoidance algorithm after considering factors including camera,energy,mobility,thermal control,TT＆C,etc.Firstly,engineering constraints of the satellite design are transformed into space geometric constraints in this method,and an algorithm with clearly constrained parameters is introduced into satellite attitude control,to make camera avoid the sunlight invation by adjusting the satellite attitude.The simulation results based on typical operating conditions show that the angle between the camera axis vector and the sunlight incidence rector satisfies the constraints in the circumvention process,which verifies the effectiveness of the method,and confirms that the method can be used to meet the requirements of the satellite in orbit.