The main contributions are as follows : first , geometry algorithm for determining position with two satellites is studied . three parameters including intersection angle , pitching angle and visual angle are selected to describe the geometric relationship of observation intersection 其主要研究内容包括:推导了双星定位的几何方法;根据目标和两颗卫星的空间位置关系,设定了三个角度参数来描述双星定位的精确度。
The new positioning system which employs three geostationary satellites emitting radio signals to users just like the gps satellites do , and allows the users receiver to solve position based on the received radio signal as well as the reading of electronic map , the drawbacks of double - star navigation system are overcome 三颗同步导航卫星像gps卫星那样向用户播发导航电文,用户接收机根据这些导航电文信息以及电子地图高程数据,像gps接收机那样解算用户位置,从而克服了双星定位的两大缺陷。
In this paper , the author introduces firstly the basic theory for the vehicle auto - navigation system , and secondly gps data receiving programs and the methods of designing and realizing electronic map locating software , which follow the sum - up of and the analysis to the typical integrated navigation system and the algorithm of map matching . at last , the author introduced the double star position system , and aiming at its application in the intelligent transportation system a schedule monitoring & dispatching system model is presented 本文首先对车辆自导航系统中的基础理论进行了介绍；接着详细介绍了gps数据接收程序和电子地图定位跟踪软件的计设与实现方法，对典型的组合导航系统和地图匹配算法作了总结和分析；最后，对我国的双星定位系统作了介绍，针对双星定位系统在智能交通方面的应用提出了一种调度监控系统模型。
The integrated positioning system based on dual - satellite and pesudolite technology to improve dual - satellite performance is researched . the mode of navigation processing unit in the receivers is passive , and the positioning precision was improved in this improved integrated positioning system . this research enlarged the applied field of pesudolite system and advanced the research in dual - satellite system 本文是对该系统的改进型研究，提出了北斗卫星和伪卫星技术相结合的实施方案，实现了高精度的区域无源定位，所做工作对开拓伪卫星的应用领域和北斗双星定位导航系统的研究具有很大的意义。
