EGM2008地球重力场模型在北金山矿区高程控制测量中的应用

摘要

利用中国国家测绘地理信息局关于EGM2008地球重力场模型研究的公开资料，使用GPS控制测量和传统光学水准测量方法以及3种常用地球重力场模型（DQM94a、EGM96和EGM2008），对北金山矿区高程控制测量数据进行观测和平差，通过ECEF、误差椭圆分量和误差椭圆平衡图等手段比较其成果，得到以下结论：（1）EGM2008地球重力场模型在甘肃陇南北金山地区的高程精度为6.9 cm；（2）EGM2008地球重力场模型比传统重力场模型EGM96和DQM94a精度更高，EGM2008模型的工作效率和精度比传统光学导线水准测量的效率和结果更优；（3）EGM2008地球重力场模型适用于我国甘肃陇南多山地区的矿山测量工作。%The public data of EGM2008 Earth Gravity Field Model from National administration of surveying, mapping and geo-information is used in measuring and balancing the elevation control survey data of Beijinshan gold deposit.Two measurement methods (GPS control survey and conventional optical leveling) and three common gravity field model (DQM94a,EGM96 and EGM2008) are used in the study,and we compared its effect by three different methods,which are ECEF,error ellipse component and ellipse equilibrium diagram.The results show that the height accuracy of EGM2008 Earth’s gravity field model is 6.9 cm in Beijinshan gold deposit,EGM2008 Earth’s gravity field model has a higher accuracy than the traditional gravity model EGM96 and DQM94,the efficiency and accuracy is better than conventional lead levels,EGM2008 Earth’s gravity field model is proved suitable for mine surveying work of mountainous areas of Southern Gansu.