GPS定位技术在跨河水准测量中的应用  

Application of GPS in the River-Crossing Leveling

作　　者：徐辉[1] 

机构地区：[1]中铁隧道集团有限公司工程部,河南洛阳471009

出　　处：《全球定位系统》2008年第3期37-41,共5页Gnss World of China

摘　　要：利用GPS定位技术测定跨河两岸点位大地高差,同时使用精密水准仪测定同岸点位的水准高差,据此求出观测点位之高程异常值及其线性变化率,并利用似大地水准面在窄线条小区域范围内高程异常值均匀变化特性,拟合求得跨洋段的高程异常变化率及异常差,从而计算出水准高差。结果表明,采用这种方法得到的精度可靠,满足工程要求。本实践得出了一些有益启示,对类似工程有一定参考借鉴作用。Use GPS receiver to measure the height difference of river-crossing points. At the same time , measure level height difference of these points with using precise level . Making use of the geoid within the region of small district of narrow lines the height anomaly to be consistent variety speciality, compute the height anomaly and its line variety rate and figure out river--crossing level high difference. The results show accuracy credibility of this kind of method and fulfill the requirem＇ents of the construction engineering quantity. This fulfillment gets some usefull revelation which will be beneficial to the similar project.

关 键 词：GPS跨河水准 GPS测量法 三角高程法 布设方法 

分 类 号：P224[天文地球—大地测量学与测量工程]