一种基于综合模型的GPS高程优化方法

Method of GPS Elevation Optimization Based on an Integrated Model

在实际应用中常需要将GPS测量得到的大地高转换成正常高,为获得高精度正常高,拟合出高精度的高程异常是非常重要的。传统的求解高程异常方法无法在复杂地形下拟合出高精度高程异常。为解决此问题,提出一种融合加权均值法和多项式曲面拟合法的综合模型方法来求解高程异常。该方法在多项式曲面拟合方法的基础上加上地形改正,使其在高程异常起伏较大的区域同样能达到较高的拟合精度。通过工程实例验证,该综合模型方法相较两种传统的方法在复杂地形环境下能够获得更好的内符合精度和外符合精度。

In practical engineering applications,it is often necessary to convert the geodetic height obtained by GPS measurement to normal height.In order to obtain high precision and normal height,it is very important to fit high-precision elevation anomalies.The traditional method of solving elevation anomalies cannot fit high-precision elevation anomalies in complex terrain.To solve this problem,a comprehensive model method combining the weighted average method and the polynomial surface fitting method was proposed to solve the elevation anomaly.The method adds terrain correction based on the polynomial surface fitting method,so that it can achieve high fitting precision in the region where the elevation abnormality is large.Through the engineering example,the integrated model method can obtain better internal and external accuracy in the complex terrain environment compared with the two traditional methods.