在高度保持模式下提高GPS定位精度的方法

A New Method of Improving GPS Positioning Precision With Altitude Hold Mode

由于受美国政府的SA政策、星历误差、卫星钟差、电离层效应、对流层效应等因素的影响 ,GPS的绝对定位精度约为 10 0m ,仅能满足运动物体一般的导航需要。为了提高GPS的绝对定位精度 ,在不依赖于其它导航系统的辅助或采用定位差分方法的前提下 ,引入了高度保持模式 ,并在此约束条件下应用总体最小二乘法 ,通过理论分析和实验计算验证了这一方法的有效性。

The problems met in real circumstance during GPS position measurement are the positioning accuracy, which is about 100m, it can't satisfy the requirements of many objects. In this paper, we introduce a new method of improving GPS (Global Positioning System) positioning precision. Without using other equipment, the method is based on an altitude hold mode, under this constraint condition we use the TLS (Total Least Squares) algorithm to make the method effective. The results show that the algorithm can evidently improve the GPS positioning precision.