GPS连续运行参考站网在线定位软件研制
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摘要
长基线高精度GPS网解算是一项较复杂的数据处理工作,用户静态GPS观测数据与连续运行参考站(continuously operating reference stations, CORS)的基准站数据组网解算具有一定优势,但基准站坐标属于保密数据,普通测绘用户不易获取。为解决该问题,采用网络计算模式来实现CORS-GPS组网解算。基于UNIX平台及GAMIT/GLOBK解算模块,采用Socket多线程并发通信技术,研制了服务器端软件;基于Windows系统研制了客户端软件,解算过程由用户发送数据到服务器自动解算,将解算结果反馈给用户。实验结果表明,技术路线可行可靠,为CORS-GPS组网解算提供了技术模式,拓展了CORS系统高精度定位服务。
It is a complex technical work to solve long baseline GPS network with high precision. There are some advantages to combine the static GPS observation data of users with that of CORS reference stations. The reference stations coordinate's data are usually confidential, which cannot be obtained easily by ordinary users. Based on UNIX operation system and GAMIT/GLOBK software, a server software is developed by using the socket multithread concurrent communication technology and the corresponding client software is developed in Windows OS. The CORS-GPS network solution is solved by using network computing mode. The calculation process consist of sending data to the server by the user, automatic calculation by the server, finally, and the feedback of calculation results to the user. The experimental results show that the method is feasible and reliable. It provides a new technical mode for high precision CORS-GPS network adjusting, and can provide high precision positioning services for CORS center.
It is a complex technical work to solve long baseline GPS network with high precision. There are some advantages to combine the static GPS observation data of users with that of CORS reference stations. The reference stations coordinate's data are usually confidential, which cannot be obtained easily by ordinary users. Based on UNIX operation system and GAMIT/GLOBK software, a server software is developed by using the socket multithread concurrent communication technology and the corresponding client software is developed in Windows OS. The CORS-GPS network solution is solved by using network computing mode. The calculation process consist of sending data to the server by the user, automatic calculation by the server, finally, and the feedback of calculation results to the user. The experimental results show that the method is feasible and reliable. It provides a new technical mode for high precision CORS-GPS network adjusting, and can provide high precision positioning services for CORS center.
引文
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[2] 金蕾,胡友健,梁新美.GPS在线数据处理软件的精度分析[J].地理空间信息,2007,5(2):85-87
[3] 李健,吕志平.基于CORS的卫星定位在线服务系统[J].测绘通报,2007(8):40-44
[4] 陈豪,李剑,杨华先,等.CORS服务中在线坐标转换系统的设计与实现[J].测绘通报,2012(10):48-50
[5] 夏玲,王伟平.客户端与服务器端的Socket通信[J].电脑知识与技术,2009,5(4):812-813
[6] 尹德春.多线程技术在串口通信中的应用[J].微计算机信息,2005 (14):129-130
[7] 关锐,李明珠.UNIX下基于C++的Socket模型的并发通信的实现[J].信息通信,2012 (4):177-178
[8] 阚能琪.VC++串口通信中多线程技术的应用研究[J].西华大学学报(自然科学版) ,2005,24(4):84-85
[9] 王刘准,花向红,岳海斌,等.莆田市GPS复测控制网解算中基准站选取的研究[J].测绘地理信息,2015,40(5):33-35
[10] 徐克宝,武慧,文艺成.基于Socket的Windows与Linux平台异步通信[J].计算机系统应用,2015 ,24 (7):232-235
[11] 张志佳,于立国,李海滨,等.基于多线程的Linux下并发服务器的实现研究[J].微计算机应用,2007,28(4):368-371
[12] 张南平,徐静.基于进程池的Linux并发服务器的研究[J].计算机与数字工程,2009 ,37 (1):159-161
[13] Blasco S,Bustos J,Rivera D.Detection and Containment Amortization UDP Sockets for Multithreading on Multicore Machines [J].IEEE Latin America Transactions,2016,14(6):2 853-2 856
[14] Kasim H,March V,See S.Performance Comparison of Four-Socket Server Architecture on HPC Workload[C].The 2009 International Conference on Computational Science and Engineering,Vancouver,Canada,2009