EGM2008模型高程异常在山东地区的精度分析  

Accuracy analysis of elevation anomaly of EGM2008 model in Shandong Province

作　　者：章思亮 陆海玉 张亮 章良 刘浩 Zhang Siliang;Lu Haiyu;Zhang Liang;Zhang Liang;Liu Hao(Shandong Survey and Design Institute of Water Conservancy Co.,Ltd.,Jinan 250014,China;Shandong Xinhui Construction Group Co.,Ltd.,Dongying 257000,China;Shandong Water Conservancy Engineering Test Center Co.,Ltd.,Jinan 250200,China)

机构地区：[1]山东省水利勘测设计院有限公司,济南250014 [2]山东新汇建设集团有限公司,山东东营257000 [3]山东省水利工程试验中心有限公司,济南250200

出　　处：《工程勘察》2024年第11期54-59,共6页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金项目(42002257);中央引导地方科技发展资金项目(YDZX2022019).

摘　　要：根据分布各地市GNSS水准点计算得出EGM2008模型在山东省范围高程异常总体精度和各地市精度,通过对计算结果进行分析,得出山东各地市EGM2008模型高程异常精度差距明显,即使相邻地市同一地形也有不小差距的结论。进一步比较各地市高程异常误差平均值与标准差之差,证明一定区域内用已知点固定差进行高程异常解算的可行性。讨论山东省各地市GNSS水准点EGM2008模型高程异常分布情况,统计高程异常误差突变区域,总结了EGM2008模型高程异常精度分布情况及实际应用中注意事项,为EGM2008模型在山东省内的工程应用提供参考。Based on the GNSS benchmarks in various cities,the overall accuracy of the EGM2008 model for elevation anomalies within Shandong Province and the accuracy of various cities were calculated.By analyzing the results,it is concluded that there is a significant difference in the accuracy of the EGM2008 model elevation anomalies in various cities in Shandong,even if adjacent cities have the same terrain,there is still a significant difference.Further comparison was made between the average and standard deviations of elevation anomaly errors in various cities,proving the feasibility of using known point fixed differences for elevation anomaly calculation in a certain area.Discussed the distribution of elevation anomalies in the EGM2008 model of GNSS benchmark points in various cities in Shandong Province,counted the areas of elevation anomaly error mutation,summarized the accuracy distribution of elevation anomalies in the EGM2008 model and practical application precautions,providing reference for the engineering application of EGM2008 model in Shandong Province.

关 键 词：EGM2008 高程异常 山东地区 精度分析 

分 类 号：P228[天文地球—大地测量学与测量工程]