基于静态灰模型的带状工程GPS大地高转换  

Conversion of GPS geodetic height of belt-shaped projects based on Static Grey Model

作　　者：刘祖强 粟玉英 李明辉 熊灏 彭冲 

机构地区：[1]长江勘测规划设计研究院长江岩土工程总公司(武汉),湖北武汉430010

出　　处：《人民长江》2013年第9期20-23,40,共5页Yangtze River

摘　　要：工程测量时,必须将GPS定位技术获得的大地高转换成正常高。根据带状工程测量控制点高程异常(大地高与正常高差值)序列的特点,提出了以高程异常序列为行为主因素,以控制点的坐标按多项式展开后的系数构成控制点的位置因素为原因量子序列,在不考虑高程异常序列的导数变化率时,可用静态灰模型GM(0,h)进行GPS大地高向正常高的转换。通过高山区公路高程控制测量实例计算,说明该方法转换精度明显优于常用的函数模型拟合法。特别是当测区内GPS控制点与水准点较少时,该方法比传统的函数模型拟合法转换更具有明显的优势,可以推广应用于其他带状工程GPS大地高向正常高的转换。GPS geodetic height must be converted into normal height in engineering surveys. According to features of height a- nomaly sequence of surveying control points in belt - shaped projects, GPS geodetic height is converted into normal height by Static Grey Model（0,h）without the consideration of the derivative variation rate of height anomaly sequence. In this process, the height anomaly sequence is considered as the main factor of action, and the coefficients of coordinates of control points obtained by polynomial expansion are considered as the causal sub - sequence. Through the control survey on mountainous roads, the cal- culations show that conversion accuracy of the method is significantly advantageous than the commonly used function model fitting method, especially with the less GPS control points and leveling points in survey areas.

关 键 词：GPS 大地高 正常高 灰模型 转换 带状工程 

分 类 号：P62[天文地球—地质矿产勘探]