北斗定位系统在轨道参数测量上的应用  

Application of Beidou Positioning System in Orbit Parameter Measurement

作　　者：杨杰 王一军[1] 余明杨[1] 

机构地区：[1]中南大学信息科学与工程学院,长沙410075

出　　处：《计算机测量与控制》2018年第1期14-17,共4页Computer Measurement &Control

基　　金：铁道部开发计划重点项目(2012G003-B)

摘　　要：利用日趋完善的北斗定位系统设计了一种新型轨道外部几何参数测量系统;该系统由北斗定位系统、配备北斗卫星接收机的轨检仪及数据处理终端等三部分构成;建立基于移动基站的动态短基线观测控制网,对数据进行站间和星间双差处理;基于多频观测量的线性组合,得到超宽巷、宽巷、中巷及窄巷观测量,采用逐级模糊度确定法固定整周模糊度,即沿着从超宽巷到窄巷的顺序依次求解整周模糊度;解算出天线相位中心的准确坐标并作平差处理,利用线性拟合方法拟合所需测量点并计算当前弦长下轨道轨向值;为验证系统实用性,设计基于北斗定位系统的轨道外部几何参数检测实验,轨向值静态测量误差和动态测量误差分别为0.6mm和13mm。A new external orbital geometric parameter measurement system is designed by using the increasingly perfect Beidou positioning system.The system has three parts which are Beidou positioning system,equipped with Beidou satellite receiver track instrument and data processing terminal.The dynamic short baseline observation control network based on mobile base station is established,and the data is inter-station and inter-satellite double difference processing.Based on the linear combination of multi-frequency measurement,the observation of the wide alley,the lane,the middle lane and the narrow lane is obtained,and the ambiguity is fixed by the step-by-step ambiguity method,that is,along the order from the super-wide lane to the narrow lane in order to solve the whole orbit ambiguity.The exact coordinates of the center of the antenna are calculated and adjusted,and the required measurement points are fitted by the linear fitting method and the orbital value of the current chord length is calculated.In order to verify the practicability of the system,the trials of the external geometric parameters of the orbit based on the Beidou positioning system are designed.The static measurement error and dynamic measurement error of the track direction value are 0.6 mm and 13 mm respectively.

关 键 词：北斗定位系统 轨道外部几何参数 移动基站 线性组合 逐级模糊度确定法 

分 类 号：U216.3[交通运输工程—道路与铁道工程]