取消SA后GPS在城市车辆定位导航中性能分析

Urban vehicle position and navigation:performance of GPS after SA

针对取消SA后GPS在城市车辆定位导航方面的性能进行了研究,通过对定位导航系统不同参数的引用,利用实验对GPS单点定位在市区内进行导航的可行性进行分析。将实验中的单点定位数据与以前SA政策下的GPS单点定位数据和差分GPS(DGPS)数据进行比较,确定取消SA后GPS性能在市区内的改善状况,为在城市内建立车辆定位导航系统提供依据。

The article studied the performance of GPS after SA in urban vehicle position and navigation system. Differential parameters of navigation system are used and the availability of stand-alone navigation has been analyzed by using experiment. The stand-alone data of experiment are compared to the stand-alone data with SA and differential GPS (DGPS) data with SA, which can determine the level of the improvement of the performance of GPS after SA in a city. The result of comparisons can proide a conference for building a vehicle position and navigation system in a city.