联合CDGPS技术和星间相对测量进行编队星座状态确定  

Formation Constellation States Determination With Carrier Phase Differential GPS and Intra-Satellite Relative Measurement

作　　者：范国清[1] 王威[1] 郗晓宁[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,长沙410073

出　　处：《空间科学学报》2005年第3期218-223,共6页Chinese Journal of Space Science

基　　金：国家自然科学基金项目(10072076)武器装备预研基金项目(51400201013KG01)共同资助

摘　　要：以空间圆3星编队星座为对象,建立了联合GPS载波相位差分(Carrier phase Differential GPS,CDGPS)和星间相对测量进行编队星座状态确定的数学模型;利用高精度的星间相对测量信息给星间公里级基线提供厘米级约束,极大地缩小了星间单差模糊度的搜索空间,进而在卫星无需机动的情况下采用Bayes最小二乘法快速解算出星间GPS载波相位单差整周模糊度;最后数学仿真证明了方法的有效性,结果表明卫星间相对位置确定精度达10-2m,卫星姿态确定精度达10-3rad.This paper presents a mathematical model of determining states of three satellites circular formation constellation, which combines the Carrier Phase Differential GPS (CDGPS) with inter-satellite relative measurement. And then, with the centimeter length constraint to the kilometre baseline inter-satellite which supplied by high accurate inter-satellite relative measurement, the search space of ambiguity is compressed impressively. On this base, the integer ambiguity of single CDGPS inter-satellite was initialized quickly using Bayes Least Square without any satellite movement intentionally. Lastly, the availability was proved by mathematic simulation. Learning from the simulation result, the accuracy of relative positions between satellites reaches 10-2 m and the accuracy of attitude of satellite reaches 10-3 rad.

关 键 词：星间相对测量 编队星座 DGPS技术 状态 载波相位差分 卫星姿态确定 phase 整周模糊度 最小二乘法 Bayes 数学模型 测量信息 搜索空间 快速解算 数学仿真 空间圆 厘米级 高精度 卫星间 

分 类 号：P228.4[天文地球—大地测量学与测量工程] P151[天文地球—测绘科学与技术]