摘要
GPS定位可同时求得测站的三维坐标:经度L,纬度B和大地高H。目前GPS定位所求得的高程信息尚未得到充分利用,原因之一在于测高精度不够。为了挖掘GPS测高的精度潜力,充分利用这种宝贵的信息资源,本文对影响测高精度的因素进行了分析,提出了消除或削弱上述误差影响的方法和措施。最后通过一个实例来表明在地壳形变测量等应用领域中用GPS定位来替代一、二等水准测量的可能性。
By GPS positioning, we can obtain the three-dimensional coordinates of stations: latitude B, longitude L and ellipsoidal height H. One of the reason is lower of altimetric accuracy. In order to exploit the potentialities of the accuracy of the heisht provided by GPS position and to make full use of the valuable resources, we analyse the factors affecting the accuracy of the height, propose, the ways and measures to eliminate or reduce the aforementioned errors. Finally an example is given to indicate that the GPS Positioning may be used instead of the first order and second order levelling in determination of crust deformation and other applications.
出处
《武汉测绘科技大学学报》
CSCD
1993年第3期67-73,共7页
Geomatics and Information Science of Wuhan University
基金
国家测绘局八.五重点科技攻关项目
关键词
GPS
定位
三维坐标
精度
大地测量
GPS positioning
three-dimensional coordinates
ellipsoidal height
