GPS和类GPS测距技术联合用于双星编队星座的状态确定  

Application of GPS and 'GPS-like' Ranging Technology in the States Determination of Double-satellite Formation Constellation

作　　者：王威[1] 胡利民[1] 

机构地区：[1]国防科技大学机电工程与自动化学院,湖南长沙410073

出　　处：《国防科技大学学报》2006年第5期11-16,共6页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(10072076);国家部委基金资助项目(51400201013KG01)

摘　　要：编队卫星状态的高精度确定是编队星座功能实现的重要基础。针对对地观测的双星编队星座的状态确定问题,为了提高状态确定的精度,在GPS技术的基础上,引入了类GPS测距技术,建立了联合GPS和类GPS测距技术进行状态整体确定的两种数学模型,并讨论了GPS星间单差模糊度和类GPS星内单差模糊度的同时初始化方法,最后进行了数值仿真。仿真结果显示,类GPS观测值尤其是类GPS星内载波单差观测值的引入,明显提高了双星编队星座的状态确定精度,其中绝对姿态角的精度达到rad,相对位置的精度达到m,相对钟差的精度达到s。仿真证明方法正确有效,模型二更优于模型一。Precise determination of formation states provides the foundation for Formation Constellation to carry out its function. In this paper, the state determination problem of double-satellite formation constellation for earth-observation purpose was discussed. On the basis of GPS, a ‘GPS-llke＇ ranging technology was introduced to improve the state results. Two mathematical models combining ‘GPS- like＇ Ranging technology with GPS were built. In this way, a synchronous initialization method for single differential GPS inter-satellite integer ambiguity and single differential ‘GPS-like＇ intra-satellite integer ambiguity were also developed. Finally, these models above were simulated and analyzed. The results indicate that, ‘GPS-like＇ observation data, especially the single differential ‘GPS-like’intrasatellite cartier phase data, significantly improved the states results, and the accuracies of absolute attitudes, relative position and relative clock bias respectively reached rad, m and s. The simulation proves that these methods are correct and model Ⅱ is more accurate than model Ⅰ.

关 键 词：GPS 类GPS测距技术 双星编队星座 状态确定 整周模糊度 

分 类 号：V412.41[航空宇航科学与技术—航空宇航推进理论与工程]