基于EIGEN-6C4模型的区域GNSS高程拟合  

Regional GNSS Elevation Fitting Based on EIGEN-6C4 Model

作　　者：陈伟 CHEN Wei(Shanghai Geotechnical Engineering Testing Center,shanghai 200436,China)

机构地区：[1]上海市岩土工程检测中心,上海200436

出　　处：《地矿测绘》2020年第1期17-19,共3页Surveying and Mapping of Geology and Mineral Resources

摘　　要：文章针对GNSS接收机观测的大地高无法直接利用到工程建设中的问题,研究了基于超高阶EIGEN-6C4重力场模型的"移去-拟合-恢复"法,以某区域项目实际数据为例采用常规拟合法和基于重力场模型拟合两种方法将GNSS所测大地高转换为正常高,并采用内符合精度和外符合精度两种方法对转换结果进行评定。实验结果表明,基于重力场模型的方法能较大提高拟合精度。In view of the problem that the geodetic height observed by GNSS receiver can not be directly used in engineering construction,this paper mainly studies the "remove fit recover" method based on EIGEN-6 C4 model.Taking the data of a regional project as an example,the geodetic height measured by GNSS can be converted into normal height by using both of the conventional fitting method and the fitting method based on the gravity field model.Then,the conversion results are evaluated by two methods of internal and external accuracy.The results show that the proposed method can greatly improve the fitting accuracy.

关 键 词：EIGEN-6C4模型 大地高 正常高 高程拟合 精度评定 

分 类 号：P228.4[天文地球—大地测量学与测量工程]