天津CORS实时地方基准服务平台探讨
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摘要
针对天津市GNSS连续运行参考站无法提供实时地方基准服务,用户必须通过事后坐标转换才能获取1990年天津市任意直角坐标成果,导致用户作业效率低、数据中心运营压力大等问题,提出基于中间服务器的天津CORS实时地方基准服务方法,并研制了软件平台"VRSRelay":通过建立中间服务器,对Trimble Pivot差分改正数进行技术处理和转发,实现在地方坐标转换参数保密的前提下,提供实时地方基准服务。实验结果表明,该平台能够满足用户实时厘米级1990年天津市任意直角坐标测量的需求,在降低数据中心运营压力的同时,能够有效减少用户作业环节,提高工作效率。
Aiming at the problem that the user must obtain any cartesian coordinate of Tianjin of the year 1990 through post-coordinate conversion because Tianjin GNSS continuous operation reference station can not provide real-time local datum service,leading to low working efficiency for users and large operation pressure for the data center,the paper proposed the method of real-time local datum service based on the intermediate server with developing the relevant software platform ‘VRSRelay':by establishing an intermediate server,the Trimble Pivot differential corrections were technically processed and forwarded to provide a real-time local datum service under the premise of ensuring the secrecy of local coordinate transformation parameters.Experimental results showed that the platform could meet the requirement of real-time centimeter-level RTK positioning under any cartesian coordinate of Tianjin of the year 1990,and reduce the operation pressure for the data center and the working steps for users efficiently.
Aiming at the problem that the user must obtain any cartesian coordinate of Tianjin of the year 1990 through post-coordinate conversion because Tianjin GNSS continuous operation reference station can not provide real-time local datum service,leading to low working efficiency for users and large operation pressure for the data center,the paper proposed the method of real-time local datum service based on the intermediate server with developing the relevant software platform ‘VRSRelay':by establishing an intermediate server,the Trimble Pivot differential corrections were technically processed and forwarded to provide a real-time local datum service under the premise of ensuring the secrecy of local coordinate transformation parameters.Experimental results showed that the platform could meet the requirement of real-time centimeter-level RTK positioning under any cartesian coordinate of Tianjin of the year 1990,and reduce the operation pressure for the data center and the working steps for users efficiently.
引文
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[8]李江卫,刘经南,肖建华,等.基于VRS系统的精密正常高实时测量[J].大地测量与地球动力学,2010,30(6):86-90.
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[10]魏二虎,柴华,刘经南.VRS定位算法的研究[J].武汉大学学报(信息科学版),2006,31(11):1007-1010.
[2]刘经南,刘晖.连续运行卫星定位服务系统:城市空间数据的基础设施[J].武汉大学学报(信息科学版),2003,28(3):259-264.
[3]刘晖,时晓燕,杨沾吉,等.深圳市连续运行卫星定位服务系统的建立与试验[J].测绘通报,2003(9):33-36.
[4]张明.GPS/BDS长距离网络RTK关键技术研究[D].武汉:武汉大学,2016.
[5]李成钢,张晋升,史小雨.中海达在线坐标转换服务系统[J].测绘通报,2017(5):159-160.
[6]吴文坛,田挚,王新广,等.河北CORS管理及应用服务系统研究与实现[J].导航定位学报,2015,3(4):114-118.
[7]伍孟琪,郭际明,周长志,等.现有CORS系统的问题分析及解决方案[J].测绘通报,2015(5):54-56.
[8]李江卫,刘经南,肖建华,等.基于VRS系统的精密正常高实时测量[J].大地测量与地球动力学,2010,30(6):86-90.
[9]魏子卿,葛茂荣.GPS相对定位的数学模型[M].北京:测绘出版社,1998.
[10]魏二虎,柴华,刘经南.VRS定位算法的研究[J].武汉大学学报(信息科学版),2006,31(11):1007-1010.