利用剩余高程异常模型建立阳山矿区GPS高程转换算法

随着卫星重力测量技术的不断完善和发展,使得利用重力场模型进行GPS点高程转换的精度和可靠性都获得了极大提升。文章利用SRTM、DTM2006.0模型和EGM2008模型求得阳山矿区GPS点剩余高程异常,并进行残余高程异常拟合,建立阳山矿区剩余高程异常转换计算方法。在对阳山矿区22个D级GPS点,48个E级GPS点的高程数据进行比较后,发现此方法转换最高精度能达到2.8 cm,最差精度为4.4cm,平均精度为3.2 cm,从而证明了此方法可以提高阳山矿区GPS高程转换的精度。

GPS elevation transformation algorithm by using residual elevation anomaly model in Yangshan gold deposit area

With the constant improvement and development of satellite gravity technology, the accuracy and reliability of GPS point elevation conversion are greatly improved by using gravity field model. In this paper, GPS elevation transformation algorithm was constructed by using SRTM, DTM2006.0 and EGM2008 model to calculate the residual elevation anomaly of GPS points in Yangshan gold deposit area and fusion of the residual elevation anomaly. After comparing elevation data of 22 D-grade GPS points and 48 E-grade GPS points, it is found that this method can achieve the most elevation accuracy of 2.8cm, and the worst accuracy of 4.4cm, the average accuracy of 3.2cm. Therefore, it proved that this method can improve the GPS height conversion accuracy in Yangshan gold deposit area.