顾及EGM 2008重力场模型的移去-恢复技术GPS高程拟合  

GPS Height Fitting Based on Remove-restore Method Considering the EGM2008 Earth Gravity Field

作　　者：万谋知 

机构地区：[1]湖北兴隆测绘有限公司,湖北兴山443700

出　　处：《地理空间信息》2014年第5期114-115,118,共3页Geospatial Information

摘　　要：基于重力场模型采用移去-恢复技术将GPS高程转换为正常高,并将其与常规拟合方法进行比较。对某一线路GPS数据进行处理,结果表明,该方法能改善高程异常拟合精度。EGM2008在不同阶数计算的精度有明显变化,阶数越高,精度也越高。将EGM2008与EGM96比较发现,EGM2008模型计算得到的高程异常精度提高更为突出。This paper discussed the remove-restore technology of GPS geodetic height to normal height using the gravity field, and compared with the conventional fitting method. Some special GPS data were presented on a special line. The result shows that the method can improve the precision. The accuracy of EGM2008 at the different orders has a significant change, the higher the order, the higher the accuracy. Compared with EGM96, the accuracy of EGM2008 height anomalies is improved prominent.

关 键 词：GPS水准 移去-恢复 高程拟合 重力场模型 

分 类 号：P223.0[天文地球—大地测量学与测量工程]