基于EGM2008重力模型的高程测量方法探讨

Discussion on elevation survey method based on EGM2008 gravity model

为探求EGM2008重力模型在高程测量中的应用效果,利用江西省范围内不同区域的GPS水准点高程对EGM2008重力模型外部测量相对精度进行检核。结果表明,EGM2008重力模型高程测量精度优于RTKGPS和静态GPS拟合的高程精度。将EGM2008重力模型技术应用在抗旱提水项目的高程测量中,可以提高工效,同时提出了如何提高测量精度的应对措施。

To explore the application effects of EGM2008 gravity model in elevation survey,the relative precision of the external survey of EGM2008 gravity model is verified by elevation of GPS leveling points in different regions of Jiangxi Province. The results showed that the precision of EGM2008 gravity model is better than that of the RTKGPS and static GPS. The application of EGM2008 gravity model in the elevation survey of drought resistance and water pumping can improve the working efficiency. The countermeasure to improve the survey precision is introduced.