双星/GIS组合定位建模与仿真

双星定位系统具有快速高精度定位和简短报文通信的功能．为了进一步提高定位精度，满足特殊用户需要，文中提出了由双星和道路地理信息系统组合定位的新方法，并做了计算机仿真试验，进行了组合定位精度分析．分析结果表明，该方法可明显提高双星定位精度，在适当条件下组合定位均方差小于10m。

MODELING AND SIMULATION OF INTEGRATED POSITIONING WITH DOUBLE SATELLITE AND GIS

Local positioning system with only two Geosynchronous satellites can provide not only positioning but also telegram service. In 80 s of 20th century positioning test with two satellites was successfully conducted. In 90 s of 20th century attitude determination using two satellites was also accomplished. A new method of positioning using double satellites and geographic information system (GIS) is presented in this paper. The principle of the method is discussed, and the computer simulation is accomplished. The precision analysis of integrated positioning indicates that the method can improve the positioning precision remarkably. In certain condition, the mean square error can be less than 10 meters.