昆明周边IGS跟踪站数据质量统计与评估

GNSS data quality statistics and evaluation of IGS station around Kunming city

为了在高精度GNSS网解算时更有效地选取IGS跟踪站,提出对IGS跟踪站的GNSS数据质量进行统计和评估。采用TEQC软件对2016年昆明周边21个IGS跟踪站的GNSS观测数据进行研究,结果表明:KUNM和XIAN跟踪站无可用数据,16个IGS跟踪站的数据天数在200d以上;PIMO跟踪站数据有效率最低,为83%,数据有效率95%以上的跟踪站共有11个;TCMS跟踪站受多路径效应影响最小,IISC、PIMO、SHAO和ULAB 4个IGS跟踪站受多路径效应影响较大;PIMO和SUWN跟踪站观测数据周跳严重,CSR值在5.5以上。

In order to effectively select IGS stations in the solution of high-accurate GNSS network,the paper proposed to statistically analyze and evaluate the data quality of GNSS for IGS stations.The quality of GNSS data from 21 IGS stations around Kunming City in 2016 were statistically studied with TEQC software.Result showed that there was no available data for KUNM and XIAN stations,and there were more than 200 days available for 16 IGS stations;the ratio of data availability of PIMO station was the lowest,only 83 %,while those of 11 IGS stations were more than 95 %;the multipath effect on TCMS station was the weakest,while that on IISC,PIMO,SHAO and ULAB stations were significantly;the cycle slips of PIMO and SUWN stations were serious with CSR value above 5.5.