多星座CORS基站接收机设计及数据质量实时评价  

Design of multi constellation CORS base station receiver and real-time evaluation of data quality

作　　者：刘国燕[1] 喻国荣[2] LIU Guoyan;YU Guorong(School of Electrical Engineering,Nanjing Insititute of Industry Technology,Nanjing 210023,China;School of Transportation,Southeast University,Nanjing 210096,China)

机构地区：[1]南京工业职业技术学院电气工程学院,江苏南京210023 [2]东南大学交通学院,江苏南京210096

出　　处：《测绘工程》2020年第1期41-46,共6页Engineering of Surveying and Mapping

基　　金：国家自然科学基金资助项目(41574026)

摘　　要：基站为CORS系统提供实时连续的GNSS原始观测数据,基站接收机性能和数据质量是系统运行的基本前提。文中提出一种多星座基站接收机设计方法,利用ARM9处理器搭建嵌入式硬件平台,完成Linux操作系统移植裁剪,集成我国自主的GNSS板卡(UB380)研制出专用接收机(S6535B),该接收机兼容BDS/GPS/GLO三系统八频点数据,具备网络通讯、串行通讯、显示存储等功能模块。该接收机已在天津市CORS工程实践应用,通过多站观测数据分析结果表明,多星座系统的PDOP值小于2,全天多路径效应值MP1小于0.05 m,MP2小于0.17 m,数据完整性大于95%,信噪比SNR1和SNR2大于40 dB/Hz,观测数据质量较好,满足CORS系统使用要求。The base station provides the GNSS original observation data for the CORS system. The functional performance of the base station receiver and the quality of the observation data are basic premise of the system’s working. In this paper, a method for multi-constellation base station receiver is proposed, which builds an embedded hardware platform based on ARM9 processor, and the Linux operating system is transplanted on the hardware platform. Then, a dedicated receiver(86535 B) is developed by integrating self-developed GNSS(UB380) board. The receiver supports BDS/GPS/GLO three system eight frequency data, with Ethernet module, serial communication module, and display module and storage module, which has been applied to Tianjin CORS. The experimental result shows that the PDOP of multi-constellation system is less than 2, the full-day multipath effect MP1 is less than 0.05 m, MP2 is less than 0.17 m, the data integrity is more than 95%, the SNR SNR1 and SNR2 is greater than 40 dB-Hz, and base station receiver observation data quality is better, in order to meet the requirements of CORS system.

关 键 词：基站接收机 数据质量评价 PDOP 多路径效应 

分 类 号：P228[天文地球—大地测量学与测量工程]