CORS网基线解的三维速度场解算  

Three-dimensional velocity field of CORS station based on baseline solution

作　　者：徐鹏飞[1,2] 蒋涛 章传银[2] 杨康[1,2] 芮明胜[1,2] XU Pengfei;JIANG Tao;ZHANG Chuanyin;YANG Kang;RUI Mingsheng(College of Geodesy and Geomatics,Shandong University of Science and Technology.Qingdao,Shandong 266590.China;Chinese Academy of Surveying&Mapping,Beijing 100036,China)

机构地区：[1]山东科技大学测绘与空间信息学院,山东青岛266590 [2]中国测绘科学研究院,北京100036

出　　处：《测绘科学》2021年第10期31-36,53,共7页Science of Surveying and Mapping

基　　金：国家自然科学基金项目(42074020);中国测绘科学研究院基本科研业务费项目(AR1905);自然资源部海洋环境探测技术与应用重点实验室开放基金课题项目(MESTA-2020-A001)。

摘　　要：为解决国际GNSS服务(IGS)基准误差与基线网平差模型相关误差造成的连续运行参考站(CORS)站坐标(大地高)时变信息失真问题,该文提出了基于CORS网基线解数据利用拟稳平差法解算三维速度场的方法。以台州地区为试验区,基于台州地区2017年1月1日—2019年7月31日的15个CORS站的基线解观测数据,利用附加平均值约束拟稳平差方法得到了台州地区的三维速度场。将成果与传统CORS站坐标时序分析求解三维速度场的方法进行对比分析,结果显示,台州北部地区呈下降趋势,最大下降速率约为-2.3 mm/a;台州东南部地区呈上升趋势,最大上升速率约为2 mm/a;台州西部地区处于比较平稳的状态。基于基线解求解三维速度场的方法能最大限度地保证基线网不扭曲,充分保留所有CORS全组合基线大地高差变化信息,可以准确、独立、有效地解算三维速度场。In order to solve the serious distortion problem of the continuously operating reference stations(CORS)station coordinates(geodetic height)time-varying information caused by the error between the International GNSS Service(IGS)benchmark error and the baseline network adjustment model, this paper proposed a method for solving the three-dimensional velocity field using the quasi-stable adjustment based on baseline solution. Taking the Taizhou area as the experimental area, the baseline solution of 15 CORS stations from January 1,2017 to July 31,1919 were used. And compared with the traditional CORS station coordinate time series analysis method, the results showed that the northern part of Taizhou had a downward trend with a maximum rate of decline of about-2.3 mm/a. The southeastern part of Taizhou was on the rise, with the maximum rising rate of about 2 mm/a. The western part of Taizhou was in a relatively stable state.The mean-constrained quasi-stable adjustment method could ensure that the baseline network was not distorted to the maximum extent,and fully retained all the CORS full-combination baseline geodetic difference information,which could accurately,independently and effectively solve the three-dimensional velocity field.

关 键 词：速度场 基线解 拟稳平差 连续运行参考站 

分 类 号：P228[天文地球—大地测量学与测量工程]