GPS长距离高程传递方法研究  

Research on Height Transferring with GPS in Long Distance Applications

作　　者：成国辉[1,2] 谭奇峰 

机构地区：[1]中南大学地球科学与信息物理学院,湖南长沙410083 [2]长沙市规划勘测设计研究院,湖南长沙410007

出　　处：《城市勘测》2013年第6期101-105,共5页Urban Geotechnical Investigation & Surveying

摘　　要：基于"移去-恢复"原理,借助GPS天文水准理论,本文提出了一种GPS高程传递方法。首先,通过重力场模型移去高程异常中的低频部分,得到似大地水准面的残余面;其次,通过二次曲面拟合,获取似大地水准面的残余面形状和夹角偏差,并计算基准高程点和观测点间剩余高程异常差;最后,获取两点间正常高差。试验表明,该方法可获得三等水准测量的高程传递精度,对长距离高程传递,如跨河、跨海高程传递具有借鉴作用。Based on the ＂remove - restore＂ principle, removed, and a residual surface of height. By the means of Geoid can be obtained. with the aid of GPS astronomical leveling theory, this paper gravity field model, the low-frequency part of anomaly can be With the quadratic surface fitting,we can obtain the Geoid re- sidual surface shape and the angle deviation, and calculate the residual anomaly difference between the datum points and observation points. Finally, to get the normal height difference between the datum points and observation points, based on the same height datum. In this paper, a real tests is given, and order Leveling. Meanwhile, long distance height transfer, such some reference value showed that the method close to the accuracy of the third as across the river, across the sea elevation transfer has

关 键 词：“移去一恢复”法 GPS水准 高程异常 夹角偏差 正常高 

分 类 号：P228.3[天文地球—大地测量学与测量工程]