本论文分析了基于北斗导航定位系统的三星定位系统总体结构和工作原理，对卫星导航中与定位精度有关的部分进行了研究。
This thesis analyzes the principle and architecture of three-star navigation system based on "Beidou" system and investigates the problems related with positioning precision.
三星时差定位星座是用于地面雷达辐射源定位的星座。
Three satellites cluster for time-difference localization is applied to find the radar beacon position on the ground.
从三星时差定位的原理出发，构建定位方程组，推导理论定位精度公式，详细分析各种星座布局对定位的影响。
Basing on the basic principle of tri-satellites geo-location using TDOA, theory location precision equation is developed and infection of various constellation shape are analyzed in detail.
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