基于EGM2008的GPS水准拟合在复杂地形中的应用研究  

APPLICATION OF GPS LEVELING FITTING BASED ON EGM2008 IN COMPLEX TERRAIN

作　　者：管真[1] 陈剑杰[1] 尉伯虎[1] 茹毅[1] 

机构地区：[1]西北核技术研究所,西安710024

出　　处：《大地测量与地球动力学》2012年第4期120-124,共5页Journal of Geodesy and Geodynamics

摘　　要：为提高地形复杂地区GPS水准拟合的精度,分析了EGM2008地球重力场模型的精度和应用情况。以西北某中低山测区和某丘陵测区为例,采用常规水准拟合与地球重力场相结合的"移去恢复法"进行高程拟合精度研究,并与常规水准拟合法进行对比分析。结果表明,基于地球重力场的"移去恢复法"在地形复杂地区可以达到较好的精度。To improve the GPS leveling fitting accuracy of complex terrain,the authors analyzed the accuracy and application state of EGM2008.Through taking two test areas in Northwest China as examples,the accuracies of height fitting were studied with the method of removing-restoring Earth gravity field combined with conventional GPS leveling fitting and comparison with the result only with conventional method.The results show that the removing-restoring method based on Earth gravity field can achieve better accuracy in complex terrain areas.

关 键 词：EGM2008 高程异常 曲面拟合 多面函数法 移去恢复 

分 类 号：P207[天文地球—测绘科学与技术]