昆明CORS加密基准站的质量评价

Quality Evaluation of the Densified Stations in KMCORS

为了保障昆明市连续运行参考站(Kunming Continuously Operating Reference Stations,KMCORS)网络实时动态定位(Network Real-time Kinematic,NRTK)服务的可靠性和稳定性,本研究对8个加密基准站进行了质量评价,其中包括GNSS(Global Navigation Satellite System,全球导航卫星系统)观测数据质量的测试和基准站点位稳定性评估。基于2021年10月1日~7日和2022年3月1日~7日的两期观测数据,首先采用TEQC软件进行了数据质量测试,结果显示:所有参评数据的质量均可靠,表明加密站的观测条件良好;然后,采用GAMIT/GLOBK软件进行了基线解算和平差处理,以获取加密站两期的CGCS2000坐标;最后,两期坐标较差低于限差,证明加密站的位置稳定,无须更新坐标成果。上述结果共同表明KMCORS加密站的稳定性良好,能够继续作为可靠的空间基准为授权用户提供服务。

To guarantee the reliability of the network real-time kinematic(NRTK)service provided by the Kunming continuously operating reference stations(KMCORS),this study conducted a quality evaluation of eight densified stations,which includes Global Navigation Satellite System(GNSS)observations quality testing and site stability assessment.Based on the observations of October 1-7,2021 and March 1-7,2022,the data quality was firstly checked by TEQC software.Results showed that the quality of all the observations was reliable,indicating that the observation conditions of the densified stations are good.Afterward,we used the GAMIT/GLOBK software for baseline solution and adjustment,and the two phases CGCS2000 coordinates of the stations were finally obtained.Two-phase coordinates difference shows that the added stations are stable and do not require update.The above results indicate that the densified stations are stable and can continue to serve as reliable spatial references for authorized users.