一种适用于CORS的非实参实时坐标转换方法  

A Non-Parametric Real-Time Coordinate Transformation Method Applicable to CORS

作　　者：唐韬 姚宜斌[1] 褚睿韬 马锦山 张炯 李海瑞 TANG Tao;YAO Yibin;CHU Ruitao;MA Jinshan;ZHANG J iong;LI Hairui(School of Geodesy and Geomatics,Wuhan University,Wuhan 430079,China;Xining Land Survey and Planning Research Institute Co.,Ltd.,Xining 810008,China;Hohhot Institute of Land and Space Planning,Hohhot 010090,China)

机构地区：[1]武汉大学测绘学院,湖北武汉430079 [2]西宁市国土勘测规划研究院有限公司,青海西宁810008 [3]呼和浩特市国土空间规划院,内蒙古呼和浩特010090

出　　处：《测绘地理信息》2024年第5期14-18,共5页Journal of Geomatics

基　　金：国家重点研发计划(2021YFC3000504);国家自然科学基金(42304022,42330105)

摘　　要：在实际测绘生产中,使用独立坐标系时由于其保密特性,无法在网络RTK(real-time kinematic)中应用,难以发挥城市连续运行参考站(continuously operating reference station,CORS)系统实时高精度定位的系统设计要求。本文提出一种通过七参数拟合与格网改正结合方法,将保密的独立坐标系建立要素分解为参数模型与格网模型,进行参数的非实参化达到脱密目的,后续通过CORS系统将与参数对应的格网实时发送至用户实现非实参坐标转换目的,用户可利用该方法实时获取高精度城市独立坐标系坐标。西宁地区CORS实测结果表明,基于该方法获取的地方坐标系成果精度在市区约为0.054 m,整体约为0.022 m,实现了在不显著影响坐标结果的前提下达到保密的要求。In practical surveying production,the use of independent coordinate systems,due to their confidentiality characteristics,cannot be applied in the network RTK(Real time Kinematic)due to their confidentiality characteristics,making it difficult to meet the system design requirements of real-time and high-precision positioning of the Continuous Operating Reference Station(CORS)system in cities.This article proposes a method that combines seven parameter fitting and grid correction to decompose the elements of a confidential independent coordinate system into parameter models and grid models,and non-parameterize the parameters to achieve declassification.Subsequently,the grid corresponding to the parameters is sent to users in real-time through the CORS system to achieve non-parametric coordinate conversion.Users can use this method to obtain high-precision urban independent coordinate system coordinates in real-time.The actual measurement results of CORS in Xining area show that the accuracy of the obtained local coordinate system based on this method is about 0.054 m in urban area and 0.022 m in the whole,achieving the requirement of confidentiality without significantly affecting the coordinate results.

关 键 词：坐标转换 连续运行参考站 独立坐标系 

分 类 号：P223[天文地球—大地测量学与测量工程]