文山州CORS系统建设的理论与实践

发布时间：2018-08-26 12:48

【摘要】：GPS定位技术已经从静态、快速静态发展到实时动态精确定位。由多个基准站、数据通信系统及数据中心组成的CORS系统是集成了计算机技术、网络技术、现代通信技术和GPS定位技术为一体的多功能的服务平台,是未来GPS定位技术发展的方向。由于CORS建设模式的影响,在建立的多个CORS系统基础上,实现统一整网是当前和今后一段时间需要解决的主要问题。文章首先系统的介绍了国内外和省内CORS系统的发展的现状和取得的成果,列举一些著名的CORS系统,提出了WSCORS建设的可行性和必要性。CORS是建立在GPS定位基础之上的,对GPS定位技术的概念和定位原理进行了概括性总结。介绍了GPS的基本概念和绝对定位、相对定位、差分定位的原理以及GPS各种误差及处理的方法,提出了CORS系统已成为GPS定位技术发展的方向和趋势。其次依托WSCORS工程的建设,详细总结了CORS系统建设的整个流程以及相关技术的集成应用技术,WSCORS系统采用基于虚拟站技术(VRS)的南方NRS软件及南方CORS设备,WSCORS系统建成后,功能性测试及指标性测试均达到设计的要求。建立了高精度动态坐标框架,具有良好系统完备性检测能力,实现了系统实时坐标转换和高程转换。最后,WSCORS和HHCORS控制中心通过通信网络及网络协议实现两个CORS公共基准站的数据通信、共享。利用WSCORS整网年积日为65-71天的24个基准站实测数据在GAMIT/GLOBK软件下进行了WSCORS网数据处理工作,得到了ITRF97,2000历元的坐标成果；并讨论了WSCORS和HHCORS系统的整网以及两个CORS系统的基准统一问题。在GAMIT基线解算过程中,引入了ITRF框架下IGS跟踪站BJFS、KUNM、URUM、WUHN、SHAO、LHAZ和中国地壳监测网络工程跟踪站XIAG站参与WSCORS的基线解算,利用GLOBK进行网平差,将上述的IGS站作为起算点坐标,得到WSCORS系统框架网络站点在ITRF97,2000历元下的三维地心坐标。由于观测手段和观测精度不同,速度场和板块运动的影响,IGS基准站坐标之间有微小的系统变化,CORS基准站之间观测数据也需要归算到统一的历元时刻,导致WSCORS和HHCORS的基准存在差异,探讨了九参数坐标转换模型法以及在基线解算,平差处理和平差处理后三种实现基准统一的方法。
[Abstract]:GPS positioning technology has developed from static, fast static to real-time dynamic accurate positioning. The CORS system, which consists of several reference stations, data communication systems and data centers, is a multi-functional service platform integrated with computer technology, network technology, modern communication technology and GPS positioning technology. Is the future GPS positioning technology development direction. Because of the influence of CORS construction mode, it is the main problem to solve the problem of realizing unified whole network on the basis of many CORS systems established at present and in the future. Firstly, this paper systematically introduces the development status and achievements of CORS system both at home and abroad and within the province, enumerates some famous CORS systems, and points out the feasibility and necessity of WSCORS construction. Cors is based on GPS positioning. The concept and principle of GPS positioning technology are summarized. This paper introduces the basic concept of GPS, absolute positioning, relative positioning, the principle of differential positioning, and the error and processing methods of GPS, and points out that CORS system has become the direction and trend of the development of GPS positioning technology. Secondly, based on the construction of WSCORS project, the whole process of CORS system construction and the integrated application technology of related technology are summarized in detail. The south NRS software based on virtual station technology (VRS) and the South CORS equipment WSCORS system are adopted. Functional testing and indicator testing meet the requirements of the design. A dynamic coordinate frame with high precision is established, which has the capability of detecting the completeness of the system, and realizes the real-time coordinate transformation and elevation conversion of the system. Finally, WSCORS and HHCORS control center realize the data communication and sharing between the two CORS public reference stations through communication network and network protocol. In this paper, the data processing of WSCORS net is carried out under the GAMIT/GLOBK software using the measured data of 24 datum stations whose annual cycle of WSCORS is 65-71 days, and the coordinate results of ITRF97,2000 epoch are obtained, and the whole network of WSCORS and HHCORS system and the unification of the two CORS systems are discussed. In the process of GAMIT baseline calculation, the IGS tracking station BJFS,KUNM,URUM,WUHN,SHAO,LHAZ and the Chinese crustal monitoring network engineering tracking station XIAG station are introduced into the baseline solution of WSCORS under the framework of ITRF. The network adjustment is carried out by using GLOBK, and the above IGS station is taken as the starting point coordinate. The three-dimensional geocentric coordinates of the WSCORS system frame network site under the ITRF97,2000 epoch are obtained. Because of the difference of observation means and observation precision, the influence of velocity field and plate motion on the IGS datum station coordinate has a slight systematic change. The data between the cors datum station also need to be reduced to a unified epoch time. As a result of the difference between WSCORS and HHCORS, this paper discusses the nine parameter coordinate transformation model method and the three methods to realize the unification of datum after the baseline solution, adjustment treatment and difference processing.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P228.4

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