CORS网用于会战式GPS垂向速率修正的方法研究  

Study on CORS network for correcting vertical rate of GPS repeating measurement station

作　　者：侯晓伟[1] 张双成[1] 刘智强[2] 何月帆 李振宇[1] 王栋[1] HOU Xiaowei;ZHANG Shuangcheng;LIU Zhiqiang;HE Yuefan;LI Zhenyu;WANG Dong(College of Geological Engineering and Geomantics and Mapping,Chang＇an University,Xi＇ an 710054,China;Beijing Institute of Geological ＆ Prospecting Engineering,Beijing 100048,China)

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]北京市地质工程勘察院,北京100048

出　　处：《测绘科学》2018年第7期33-37,共5页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(41104019;41674001);中央高校基本科研业务费专项资金资助(310826172202)

摘　　要：针对会战式观测模式GPS站估计测站垂向速率时未考虑周期项对速率的影响,导致测站垂向速率可靠性降低的问题,该文研究了基于连续运行参考站系统CORS的GPS连续站坐标时间序列建立测站周期项模型,并以此修正会战式GPS观测模式估计的垂向速率。以PBO网络阿拉斯加州88个GPS站2014—2016年3年的观测数据为基础,首先利用空间加权插值、二次曲面拟合法建立测站周期项模型;其次对区域内会战式GPS站的垂向速率予以修正。结果表明,两种方法均可拟合GPS观测站的年周期项,但二次曲面拟合的效果稍好;用拟合的年周期项对会战式观测站垂向速率修正后,垂向速率的正确性提高了46%以上,说明可用该方法修正会战式GPS观测站的垂向速率,以提高其可靠性。In view of the GPS station estimates the vertical rate of the station by the mode of GPS repeating measurement without considering the effect of the annual seasonal motion,which leads to the accuracy of the vertical rate decrease.Therefore,this paper studies the method that establish the station annual seasonal motion model based on the Continuously Operating Reference Stations（CORS）site coordinate time series.And to correct the vertical rate estimated by the GPS repeating measurement observations.This paper based on the observation data of PBO network of 88 GPS stations in Alaska 2014-2016 for three years,Firstly,the model of site annual seasonal motion is established by using spatial weighted interpolation and quadratic surface fitting method.Secondly,correcting the vertical rate of GPS repeating measurement station.The results show that the two methods can fit the annual seasonal motion of GPS site in CORS,especially the quadratic surface fitting more accuracy.The correctness of the vertical rate is improved by more than 46% when the vertical rate of the GPS repeating station is corrected by the fitting value of annual seasonal motion.Indicating that the method can be used to correct the vertical rate of the GPS repeating measurement station to improve its reliability.

关 键 词：年周期项 垂向速率 速率修正 会战式GPS观测 CORS网 

分 类 号：P228[天文地球—大地测量学与测量工程]