摘要
为了确定编队星座的星间相对位置和卫星姿态,在原有联合GPS差分和类GPS伪距进行状态确定的研究基础上,进一步加入了类GPS载波差分信息。利用高精度的类GPS伪距给卫星间公里级的基线提供厘米级的约束,并采用Bayes最小二乘法快速解算出GPS星间载波单差整周模糊度；先由GPS伪距单点定位、GPS星内差分定姿获得卫星间相对位置、卫星姿态的先验信息,再采用Bayes最小二乘进行编队星座状态整体确定。数学仿真结果表明卫星间相对位置确定精度优于10^(-2) m,加入类GPS载波差分后能极大提高卫星姿态确定精度,使其优于10^(-5)rad。
In order to determine relative positions between satellites and the attitudes of satellite of formation constellation, like - GPS carrier phase was added in based on former study of states determination combining with carrier phase differential GPS（CDGPS） and like - GPS ranging code. With the centimeter length constraint to the kilometer baseline intra - satellite supplied by high accurate like - GPS measurement, the integer ambiguity of single differential CDGPS intra - satellite was initialized quickly by using Bayes Least Square. Getting the apriority of relative positions between satellites and attitudes of satellite by using pseudo positioning and intra - CDGPS, the entire states of formation constellation have been resolved by Bayes Least Square. Lastly, learning from the result of simulation analysis, the accuracy of relative positions between satellites is superior to 10^-2 m and carrier phase differential of like - GPS can improve the accuracy of attitude of satellite impressively which makes it superior to 10^-5rad.
出处
《计算机仿真》
CSCD
2006年第1期44-47,共4页
Computer Simulation
基金
国家自然科学基金 10072076
武器装备预研基金 51400201013KG01
关键词
编队星座
载波差分
测量
整周模糊度
Formation constellation
CDGPS
Measurement
Integer ambiguity
