EGM2008模型计算重力扰动位及相关量的方法研究

Research on the Method of Calculating Gravity Disturbance Potential and Related Quantities with EGM2008 Model

地球重力场模型EGM2008提供了计算全球高分辨率和高精度重力场相关参量的可能。本文采用球谐综合的方法,对重力扰动位、重力异常、大地水准面高等物理量的计算步骤和方法进行了研究和分析,并编制了相应的计算程序基于EGM2008无潮模型和零潮模型对以上参量进行了计算,同NGA发布的计算程序计算的结果进行了比对,验证了计算的方法正确性和可靠性。

The earth gravity field model EGM2008 provides the possibility of calculating global high-resolution and high-accuracy gravitational field related parameters.In this paper,the calculation steps and methods of gravity disturbance potential,gravity anomaly and geoid are studied and analyzed by using the spherical harmonic synthesis method,and the corresponding calculation program is compiled.The above parameters are calculated based on EGM2008 tide free model and zero tide model,and compared with the calculation results of the calculation program issued by NGA,The correctness and reliability of the calculation method are verified.