The accuracy analysis of the geoid at the border of land and sea based on gravity field model calculation-Shandong Province as an example
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.
the border of land and seagravity field modelthe geoidaccuracy analysis
NETL
NSTL
万方数据
