摘要
为应对铁路沿线带状CORS站在复杂环境中所遇到的数据质量挑战,重点分析电离层延迟、多路径效应和信号噪声等因素对数据质量的影响。采用GNSS数据预处理软件GDPS,对BDS、GPS、GLONASS和Galileo等卫星系统的数据进行综合分析,并通过多路径误差、信噪比和电离层延迟率等参数进行深入评估。研究结果显示,所有CORS站点的数据完整率超过0.9,观测到的卫星数量≮35颗,PDOP值普遍<2.3。MP1和MP2的误差分别<0.35 m和0.45 m,周跳比超过500 o/slps,信噪比>40 dB,电离层延迟率在24 h观测期间始终保持在±0.07 m/s以内。研究结果表明,尽管铁路周边的复杂环境会对信号接收造成干扰,但由于所有CORS站均配备高效的扼流圈天线,能有效抑制多路径效应及其他潜在信号干扰,从而确保观测数据的高完整性和低误差性,满足建站的各项技术要求。
To address the data quality challenges encountered by the CORS stations along the Nanchang Railway Bureau in complex environments,this study focused on the effects of ionospheric delays,multipath effects,and signal noise on data quality.Advanced GNSS data preprocessing software developed by Tongji University(GDPS)was used to perform a comprehensive analysis of data from satellite systems including BDS,GPS,GLONASS,and Galileo.The analysis involved deep evaluations using parameters such as multipath errors,signal-to-noise ratios,and ionospheric delay rates.The results show that,the data completeness of all CORS stations exceeded 0.9,with no fewer than 35 satellites observed,and generally PDOP values below 2.3.Errors for MP1 and MP2 were less than 0.35 m and 0.45 m respectively,the cycle slip ratio exceeded 500 o/slps,signal-to-noise ratios were higher than 40 dB,and ionospheric delay rates remained within±0.07 m/s during the 24-hour observation period.In conclusion,although the complex environments surrounding the railways may interfere with signal reception,all CORS stations are equipped with efficient choke ring antennas,which effectively suppressing multipath effects and other potential interference signals to ensure high data integrity and low error rates,and meet all technical requirements for station construction.
作者
钟尖
ZHONG Jian(China Railway Nanchang Group Co.,Ltd.,Nanchang 330002,China)
出处
《铁道勘察》
2025年第4期39-47,共9页
Railway Investigation and Surveying
基金
中国铁道科学研究院集团有限公司科技研究开发计划项目(2023YJ023)。
