西藏CORS站GNSS观测数据质量评估

Data quality evaluation of GNSS CORS station in Tibet

2018年,西藏地区新建了30个全球卫星导航系统(GNSS)连续运行参考站(CORS),安装了国产南方接收机和天线,实现了无人值守、高可靠性的实时数据采集与传输。为评估新建成的西藏CORS站运行情况,以及国产GNSS接收机的工作性能,采用数理统计的方法分析了新建成的西藏CORS 2019年GNSS观测数据质量,并与中国大陆构造环境监测网络工程西藏地区CORS站的数据质量进行比对。通过分析可以看出,两个CORS网观测数据质量总体上差距不大,南方SOUTH NET S9接收机的性能基本满足CORS的应用需求,但相比于天宝(Trimble)NETR8/9系列接收机,还存在一些不足,主要表现为稳定性欠佳。

Thirty Global Navigation Satellite System(GNSS)Continuously Operating Reference Stations(CORS)were built for continuous operation in Tibet in 2018,installing domestic SOUTH receiver and antenna,and realizing unattended and highly reliable real-time data acquisition and transmission.Aiming to evaluate the operation of the newly built CORS and the performance of the domestic GNSS receiver,the 2019 data quality of the newly built CORS was analyzed by mathematical statistics,and compared with the Crustal Movement Observation Network of China(CMONOC)CORS.It can be seen that there is small gap between the data quality of the two networks,and the performance of SOUTH receiver can satisfy the requirement of CORS basically,but in contrast to the Trimble NETR8/9 series receiver,there are still some deficiencies,mostly appearing poor stability.