摘要
针对基于到达时延(TDOA)/到达频延(FDOA)联合估计定位的双星定位系统,建立了时差频差联合定位的模型并给出了解算过程。对系统定位精度的理论分析和不同参数条件下的定位性能仿真计算结果表明,双星系统可实现对辐射源的高精度定位。频差和时差测量误差对系统性能均有影响,但前者的作用更显著。基线长度越大、卫星轨道高度越低,系统性能就越优。
The algorithm model of joint-positioning of time difference and frequency difference was established for the dual-satellite positioning systems based on time difference of arrival and frequency difference of arrival in this paper, and the solving process was also given. The result of the theory analysis for system positioning accuracy and simulation under the conditions with various parameter changes showed that both measurement error of the frequency difference and time difference had effect on the system performance, the function of the former was much greater. Moreover, the longer baseline, the lower satellite＇s orbit, the higher system＇s performance.
出处
《上海航天》
北大核心
2007年第2期47-50,共4页
Aerospace Shanghai
基金
国家高新(863)计划资助(2005AA776061)
关键词
双星编队
无源定位
时差
频差
圆概率误差
Dual-satellite formation
Passive location
Time difference of arrival
Frequency difference of arrival
Circular error probability
