摘要
提出一种基于非线性最小二乘(NLS)的三星座时差定位综合算法。该算法不使用WGS-84椭球模型作为定位约束条件,通过对卫星过顶前后的两组弱观测数据进行综合、配对处理,实现对目标的精确定位。仿真结果表明,该方法不仅对弱观测数据具有较好的定位精度,而且不受目标高程约束,当目标高程不确定时,仍具有稳健的定位效果。
This paper presents an integration algorithm of three - satellite constellation TDOA location based on nonlinear least square （NLS）, which is not constrained by WGS - 84 ellipsoid model. Through fusing and matching with the two groups of weak observational data produced by the satellite when entering or leaving the reconnaissance region, this algorithm can obtain precise location of the target. Simulation results show that the proposed algorithm not only has better location performance with weak observational data, but also is relatively more insensitive to the target height.
出处
《电讯技术》
北大核心
2010年第3期27-32,共6页
Telecommunication Engineering
关键词
星座
时差定位
极大似然估计
非线性最小二乘
constellation
TDOA location
maximum likelihood estimate （MLE）
nonlinear least square （NLS）
