摘要
目前,我国铁路CP0框架控制网基于GPS系统来构建,随着我国北斗系统的逐步完善,铁路行业亟需摆脱对GPS系统的依赖。在杭衢高铁进行北斗和GPS静态数据测量实验,在GAMIT内输入同时段的IGS和MGEX在亚太地区5个测站的数据,分别处理单一GPS和单一北斗的CP0基线,以标准化均方根误差和基线解算偏差作为指标来对比分析两者的基线解算精度,然后对解算得到的基线进行平差计算。研究表明:选择我国经纬度范围内3~4个MGEX站参与单一北斗二代系统的基线解算和平差起算,能够满足高速铁路测量规范对于铁路CP0框架控制网三维无约束平差最弱边相对中误差小于1/2 000 000,三维约束平差最弱边相对中误差小于1/250 000的精度要求;单一北斗二代系统能够独立应用于构建铁路CP0框架控制网,摆脱我国铁路系统在该领域长期对GPS系统的依赖。
At present, China’s railway CP0 frame control network is constructed based on GPS system. With the gradual improvement of BeiDou System, the railway industry urgently needs to get rid of the dependence on GPS system. In this paper, the static data measurement experiments of BeiDou and GPS are carried out on Hangzhou-Quzhou High-speed Railway. The data of IGS and MGEX in the same period are input in GAMIT at 5 stations in Asia-Pacific region. The CP0 baselines of single GPS and single BeiDou are processed separately. The calculation accuracies of the two baselines are compared and analyzed by using standardized root mean square error and baseline solution deviation as indexes. Then the calculated baselines are adjusted. It is concluded that 3 to 4 MGEX stations in China’s longitude and latitude range can be selected to participate in baseline calculation and difference calculation of single BeiDou 2nd generation system, which can meet the accuracy requirements of high-speed railway survey specification for 3-dimensional unconstrained adjustment of railway CP0 frame control network with the weakest side relative error less than 1/2 000 000 and 3-dimensional constrained adjustment with the weakest side relative error less than 1/250 000. The single BeiDou 2nd generation system can be independently applied to construct the railway CP0 frame control network and get away from the long-term dependence of China’s railway system on GPS system.
作者
陶灿
曹成度
滕焕乐
闵阳
TAO Can;CAO Chengdu;TENG Huanle;MIN Yang(China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,China)
出处
《铁道标准设计》
北大核心
2023年第1期81-87,共7页
Railway Standard Design
基金
中国铁建股份有限公司重大专项课题(2019-A02)。
关键词
高速铁路
GAMIT
北斗卫星导航系统
精密相对定位
基线
high-speed railway
GAMIT
BeiDou Navigation Satellite System
precision relative positioning
baseline
