浙江省区域基准框架维持研究  

Research on maintaining reference frame of Zhejiang Province

作　　者：沈正中 张乙志 刘立 王凯时 徐晓红 冯杨民 SHEN Zhengzhong;ZHANG Yizhi;LIU Li;WANG Kaishi;XU Xiaohong;FENG Yangmin(Zhejiang Academy of Surveying Mapping,Hangzhou 311100,China;Information Center of Zhejiang Provincial Department of Natural Resources,Hangzhou 310020,China)

机构地区：[1]浙江省测绘科学技术研究院,杭州311100 [2]浙江省自然资源厅信息中心,杭州310020

出　　处：《导航定位学报》2023年第2期153-158,共6页Journal of Navigation and Positioning

基　　金：浙江省自然资源厅科技项目(202114)。

摘　　要：为了实现浙江省区域2000中国大地坐标系统厘米级动态维持,提出一种基准框架维持方法:采用加米特(GAMIT)/格洛布克(GLOBK)软件处理82个卫星导航定位连续运行基准站(CORS)10 a的观测数据获得高精度的站点坐标和速度;然后提出趋势面插值模型建立15′×15′的格网速度场,进行板块运动改正;最后采用赫尔默特方法和国际地球参考框架(ITRF)公开的14个转换参数实现不同框架和历元的转换。结果表明,浙江省整体呈现由西北至东南方向的运动趋势;平均速度东和北方向分别为33.9、-10.4 mm/a;趋势面法拟合中误差最优为0.46、0.41 mm/a;从浙江区域ITRF2014(2 022.0个历元)到2000中国大地坐标系统的转换精度优于1.4 cm。In order to achieve the centimeter-level dynamic maintenance of China geodetic coordinate system 2000(CGCS2000)in Zhejiang Province,the paper proposed a maintaining method of reference frame:the high-precision coordinates and velocity of 82 continuously operating reference stations(CORS)for satellite navigation and positioning during 10 years were processed by GAMIT/GLOBK software;and the trend surface interpolation model was used to establish 15'×15'grid velocity field for the plate motion correction;finally the conversion of different frames and epochs was realized by using the Helmert coordinate transformation method and the 14 conversion parameters published by the international terrestrial reference frame(ITRF).Results showed that the overall movement trend of Zhejiang Province would present from northwest to southeast,and the average velocity would be 33.9 mm/a in the east direction and-10.4 mm/a in the north direction;the optimal mean square error of trend surface fitting method could be 0.46 mm/a in the east and 0.41 mm/a in the north;and the transformation accuracy from ITRF2014(2022.0 epochs)to CGCS2000 of Zhejiang Province would be better than 1.4 cm.

关 键 词：连续运行基准站(CORS) 速度场 插值方法 趋势面法 

分 类 号：P228[天文地球—大地测量学与测量工程]