摘要
利用江苏、广东、陕西3个区域的实测GPS水准数据,分析了EGM2008重力场模型在各区域的适用性。结果表明,在去除系统偏差后,EGM2008获取的高程异常精度较高,但不同区域差异明显:江苏地区精度为±8 cm,广东西北地区为±15 cm,陕西北部地区为±19.6 cm。联合SRTM或者GDEM数字高程模型,在广东西北地区获得正常高精度较高,且SRTM模型优于GDEM模型,精度为±7 m;在陕北地区精度略差,GDEM模型精度为22.2 m。
Using the measured GPS leveling data of Jiangsu Province,Guangdong Province,Shanxi Province,this paper analyzes the applicability of EGM2008.The results show that after the removal of the system deviation,the height anomaly calculated by EGM2008 has higher accuracy.But the differences are significant in different regions,the mean square error of height anomaly is±8 cm in Jiangsu,and is±15 cm in the northwest of Guangdong,and is±19.6 cm in the north of Shanxi.By EGM2008 and SRTM or GDEM,the accuracy of normal height is better in Guangdong than in Shanxi.The accuracy of normal height obtained by SRTM is better than GDEM in the northwest Guangdong,the mean square error of normal height is±7 m,and obtained by GDEM is better than SRTM in the north Shanxi,the mean square error of normal height is±22.2 m.
作者
王宁
李欣
秦臻
WANG Ning;LI Xin;QIN Zhen(China Energy Engineering Group Jiangsu Power Design Institute Co.,Ltd.,Nanjing Jiangsu 211102,China)
出处
《地矿测绘》
2020年第2期1-4,共4页
Surveying and Mapping of Geology and Mineral Resources
