摘要
大地水准面作为高程基准和深度基准相互转换的中间基准面,其精度对基准转换效果至关重要。以山东省为例,本文分别使用目前较优的三种超高阶重力场模型EGM2008、EIGEN-6C4和SSG-UGM-2解算陆海交接处的大地水准面,分析其在山东省内的分布特征。利用收集到的GNSS水准点数据对三种重力场模型解算结果进行精度分析。研究发现,基于EIGEN-6C4模型的解算结果是三种模型中最符合实际情况的,同时使用85高程基准面重力位解算结果精度更高。
The accuracy of the geoid,as the intermediate reference plane for the conversion of elevation and depth benchmarks,is crucial to the effectiveness of benchmark conversion.Taking Shandong Province as an example,this article calculates the geoid at the border of land based on three currently superior ultra-high order gravity field models EGM2008,EIGEN-6C4,and SSG-UGM-2 and analyzes distribution characteristics within Shandong Province.By using the collected GNSS benchmark data,an accuracy analysis is conducted on the results from three gravity field models.The study reveals that the calculation results based on the EIGEN-6C4 model are the most realistic among the three models,and the accuracy of the gravity potential calculation results using the 85 elevation reference plane is higher.
作者
张连伟
孙毅
金波文
马永
丁德秋
ZHANG Lianwei;SUN Yi;JIN Bowen;MA Yong;DING Deqiu(National Marine Data and Information Service,Tianjin 300171,China)
出处
《海洋信息技术与应用》
2024年第2期65-71,共7页
JOURNAL OF MARINE INFORMATION TECHNOLOGY AND APPLICATION
基金
国家自然科学基金(42206200)。
关键词
陆海交界
重力场模型
大地水准面
精度分析
the border of land and sea
gravity field model
the geoid
accuracy analysis
