EGM2008地球重力场模型在榆林金矿矿区高程测量中的应用

EGM2008 earth gravity field model in the application of the yulin gold mine mining height measurement

目前,对于没有完成似大地水准面精化工作的地区,常使用数学模型进行GNSS高程拟合,需要进行数据后处理才能得到拟合结果。介绍了EGM2008地球重力场模型概况,以榆林金矿矿区高程控制测量为例,分析了SDCORS网络RTK环境下,使用EGM2008地球重力场模型将大地高转换为正常高的方法。根据精度检核结果,该方法只需一个控制点,高程转换精度即可达到厘米级,可以满足地质勘查高程测量的精度要求。

At present, for failure to complete quasi geoid refinement work area is often used mathematical model for GNSS height fitting, data post process that can obtain the fitting results. Egm2008 gravity field model profile is introduced to Yulin gold mining area elevation control survey, for example, analysis of the sdcors RTK network environment, using egm2008 gravity field model will earth high conversion method for high normal. According to the accuracy of the test results, the method needs only one control point, and the elevation conversion accuracy can reach centimeter level, which can meet the accuracy requirements of geological survey elevation measurement.