摘要
分析了编队飞行卫星群对地面辐射源的无源时差定位原理,推导出该系统的几何精度因子的表达式,并计算了星下点一定范围内的定位精度。进一步对几何精度因子的分布规律进行了分析,讨论了相对位置测量精度和测时精度对几何精度因子的影响,研究了基线长度和测时精度与GDOP的关系。
In this paper,the TDOA (Time Difference of Arrival)--locating principle of Formation Flying and distributed satellites is analyzed.Further more,the expression of GDOP (Geometrical Dilution of Precision) is derived,then it is utilized to quantify the precision of location.In the end,the distributing law of GDOP is discussed,the relationship between GDOP and baselines is studied and the influences of time-measuring precision and position-measuring precision on GDOP are also discussed.
出处
《通信技术》
2006年第S1期176-178,181,共4页
Communications Technology
基金
信息产业部电子科学研究院预先研究资助项目(41306070201)
关键词
编队飞行卫星群
时差定位
精度分析
formation flying of distributed satellites
TDOA allocation
accuracy analysis
