GPS RTK应用于铁路定线测量的方案研究  

Application of GPS-RTK Technique in Railway Location Survey

作　　者：孙玉国[1] 

机构地区：[1]中国建筑材料工业地质勘查中心黑龙江总队,黑龙江哈尔滨150040

出　　处：《测绘与空间地理信息》2012年第7期112-114,120,共4页Geomatics & Spatial Information Technology

摘　　要：GPS RTK(Real Time Kinematic)定位技术是基于载波相位观测值的实时动态定位技术,定位精度高,具有观测时间短、无须通视和现场给出精确坐标等优点,使得测量作业更简单、方便、可靠和快捷。本文论述了铁路测量坐标系中存在的长度变形问题,提出了建立分段独立坐标系的数学模型,解决了在投影过程中的长度变形问题,使其投影长度变形不大于1/40 000,便于RTK直接进行铁路定线测量。GPS RTK(Real Time Kinematic),which is a real-time kinematic positioning technique based on carrier phase observations,is high in positioning accuracy and low in observation time,can provide accurate coordinate without the requirement of inter-visibility and operation locale,and makes the surveying operation simpler,more convenient,more reliable and quicker.This paper discusses the length deformation in railway surveying coordinate system,puts forward the mathematical model of establishing a independent section coordinate system for solving the length deformation problem in the coordinate system of railway surveying to make the projection length deformation less than 1/40000,and make it possible to use RTK directly in railway location surveying.

关 键 词：铁路 GPS RTK 投影变形 定线测量 

分 类 号：P228.4[天文地球—大地测量学与测量工程]