Models for Fitting Gravimetric Geoids and GPS Results

作     者：Essam Ghanem LI Jiancheng LIU Jingnan 

作者机构：Banha Higher Institute of Technology (BHIT) Banha Egypt 

出 版 物：《Geo-Spatial Information Science》 (地球空间信息科学学报（英文）)

年 卷 期：2002年第5卷第1期

页      面：28-30页

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 081802[工学-地球探测与信息技术] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 081105[工学-导航、制导与控制] 0818[工学-地质资源与地质工程] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 081002[工学-信号与信息处理] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程] 

主　　题：gravimetric geoid GPS/levelling fitting 

摘      要：The aim of this investigation is to study how to use a gravimetric (quasi) geoid for levelling by GPS data in an optimal *** advent of precise geodetic GPS has made the use of a technique possible,which might be called GPS_ gravimetric geoid *** this approach,GPS heights above the reference ellipsoid are determined for points whose levelled (orthometric) height H is above sea level people have already surveyed;for these points,we thus have the values of the geoid undulation N .These values are then used to constrain the geoid undulations N′ obtained from the gravimetric solution.