摘要
GPS高程转换中,大地高的精度将直接影响转换后正常高的精度,为此大地高的粗差探测是比较重要的一个环节。本文利用空间直角坐标和大地坐标的转换公式以及两者之间的微分关系式,来推求任意闭合环的大地高差闭合差,该方法可实现利用不同的闭合环的闭合差来探测和定位大地高粗差。算例结果表明,该方法是有效的。
The accuracy of Orthometric Height will be directly affected by ellipsoidal height precision during GPS height transformation, therefore, the detection of gross error is very important. In this paper, the ellipsoidal height difference of closed poly line is calculated by the transformation formula and the differential formula between geodetic coordinates and space coordinates. This method is used for detecting and positioning the gross error through different closed poly line. The results show that this method is effective.
出处
《工程勘察》
CSCD
北大核心
2007年第4期56-58,62,共4页
Geotechnical Investigation & Surveying
关键词
GPS
大地高
高程转换
粗差探测
GPS
ellipsoidal height
height transformation
detection of gross error
