一种基于卫星天线指向的地面站高度修正方法  

A Height Correcting Algorithm for Ground Facility Based On Satellite Antenna Pointing

作　　者：晁宁[1] 罗晓英[2] 刘鹏[1] 杨新龙 CHAO Ning;LUO Xiaoying;LIU Peng;YANG Xinlong(China Academy of Space Technology(Xi’an),Xi’an 710000,China;Xi’an Power Electronics Research Institute,Xi’an 710177,China)

机构地区：[1]中国空间技术研究院西安分院,西安710000 [2]西安电力电子技术研究所,西安710077

出　　处：《空间电子技术》2018年第5期46-49,共4页Space Electronic Technology

基　　金：国家自然科学基金资助项目(11290154)

摘　　要：为了解决非合作地面目标的精确高度确定和星间通信链路故障分析问题,文章通过结合地球扁率特性和目标可见性分析结果,提出了一种根据星载天线指向转角计算地面测站大地坐标系位置的方法。在考虑地球系统岁差章动的影响下,该方法将数据反向推算到地球固连坐标系内,并通过矢量模选择策略和高度迭代算法,不断提高所求测站的经纬高精度。在解决了天线转角缺少指向矢量绝对长度信息的情况下,指向矢量存在共轭模的选择问题,并能够准确地确定地面站高度。该方法为星地数传通信链路分析提供了更独立准确的指导信息,同时也为非合作地面目标的在轨信息获取提供了解决方案。该方法需要卫星提供准确的指向角度信息和卫星姿态,并需要对轨位信息进行格式转换,这给适用范围带来了一定的局限性。In order to solve the problem of accurate height determination of non-cooperative targets and satellite-to-earth data transmission link malfunction analyzing,combined with analyzing results of compression the earth and target visibility,the method of calculating ground facilities position under geodetic coordinate system is proposed based on satellite antenna pointing angles.With consideration of effect of precession and nutation in the Earth system,the method calculates data into ECF frame and promotes position accuracy of facilities by vector modulus choosing strategy and height iterative algorithm.The method solved the problem of choosing conjugate modulus of pointing vector to calculate facilities height accurately under the circumstances of antenna rotating angles with no information of pointing vector modulus.This method provides more independent and precise guidance information for satellite-to-earth data transmission link analyzing,and solution for on-orbit information obtaining of non-cooperative ground targets.However,the method is constrained in some area in point because of necessary information of pointing angles and satellite attitude and format conversion of orbit position.

关 键 词：经纬度 星载天线 指向 修正迭代 

分 类 号：V443.4[航空宇航科学与技术—飞行器设计]