阜新市多基站CORS建立及其在土地整理中的应用

发布时间：2018-06-18 19:36

本文选题：多基站 + 连续运行参考站　；参考：《辽宁工程技术大学》2013年硕士论文

【摘要】：目前国际上大地测量发展的一个主要方向是建立全球覆盖、全天候、高精度、动态、实时定位的卫星导航系统。因此建立永久性连续运行的GPS参考站可以为服务范围内的用户实时提供卫星导航服务。目前世界上较发达的国家和地区都已建立或筹划建立连续运行参考站系统，简称CORS。为满足国民经济建设信息化的需要，采集多种实时地理空间数据，国内的CORS系统建立迫在眉睫。本文以连续运行参考站理论为基础，以阜新市多基站CORS系统为研究对象，主要研究CORS系统建立过程中参考站选址的影响因素，CORS系统建立后的系统的坐标联测与转换及技术指标测试，结合CORS技术在阜新市大冷乡土地整理中的应用，得到以下结论： 1.为了较好的发挥阜新CORS系统的性能，经过对参考站站址观测环境测试，真实评估参考站站址附近的多路径效应、遮挡、是否有干扰信号等状况。通过对参考站址多路径分析，参考站址位信噪比分析，参考站址位数据完整性分析得出站址满足建站要求。 2.通过系统技术指标测试，包括仪器的兼容性、系统时间可用性、系统空间可用性、网络RTK初始化时间、RTK定位精度情况等5个方面，均符合技术指标，从网内网外精度对比来看，网内精度与网外精度差别不大。这说明整个系统网内网外精度分布均匀，可以提供可靠的厘米级RTK定位服务。网外最远点距离网边缘为36.8公里，其内外符合精度都在2厘米以内，满足设计要求，同时说明系统可以满足网外30公里的作业需求。整网内符合精度，北方向优2.8cm，东方向优于2.0cm，高程优于4.5cm；整网外符合精度，北方向优于3.5cm，东方向优于2.8cm。满足系统设计要求。 3.通过CORS技术在土地整理中的应用，对比CORS技术下RTK与常规RTK，得出CORS技术无需架设参考站，初始化时间短而稳定，且定位精度分布均匀。 4.CORS的建立提供了统一的、高精度的、实时动态的三维空间定位基准，实现单人单机作业，大幅度提高了生产效率，满足不同行业、不同用途、不同服务方式和不同精度层次的导航定位需求。
[Abstract]:At present, one of the main directions of geodetic development in the world is to establish a global coverage, all-weather, high-precision, dynamic, real-time positioning satellite navigation system. Therefore, the establishment of a permanent and continuous GPS reference station can provide real-time satellite navigation services for users within the scope of service. At present, more developed countries and regions in the world have established or planned to set up continuous operation reference station system, referred to as Cors. In order to meet the needs of national economic construction information, collecting a variety of real-time geospatial data, the establishment of domestic cors system is urgent. Based on the theory of continuous operation reference station, this paper takes the multi-base station cors system in Fuxin as the research object. This paper mainly studies the factors influencing the location of reference station in the process of establishing the cors system. After the establishment of the cors system, the coordinate joint measurement and conversion of the system and the test of the technical indexes are studied. The application of the cors technology in the land consolidation of Daling Township in Fuxin City is also studied. The conclusions are as follows: 1. In order to give full play to the performance of the cors system in Fuxin, the multipath effect, occlusion and interference signal around the reference station site are evaluated by the environmental test of reference station site. Through the multipath analysis of reference site, the analysis of SNR of reference site, and the analysis of data integrity of reference site, it is concluded that the site meets the requirements of station construction. 2. Through the system technical index test, including the compatibility of the instrument, the system time availability, the system space availability, the network RTK initialization time and the RTK positioning accuracy, all accord with the technical index. There is little difference between the precision inside and outside the net. This shows that the precision distribution of the whole system is uniform and can provide reliable RTK positioning service. The farthest point outside the network is 36.8 kilometers away from the edge of the network, and the accuracy of both inside and outside the network is less than 2 centimeters, which meets the design requirements. At the same time, it shows that the system can meet the operational requirements of 30 kilometers out of the network. The accuracy of the whole network is 2.8 cm in the north direction, 2.0 cm in the east direction and 4.5 cm in the elevation, and the accuracy is better than 3.5 cm in the north direction and 2.8 cm in the east direction. Meet system design requirements. 3. Through the application of cors technology in land consolidation, compared with conventional RTK, it is concluded that the cors technology does not need to set up reference stations, the initialization time is short, the initialization time is stable, and the positioning accuracy distribution is uniform. 4. High-precision, real-time and dynamic three-dimensional positioning datum can realize single machine operation, which greatly improves production efficiency and meets the needs of navigation and positioning in different industries, different uses, different service modes and different precision levels.
【学位授予单位】：辽宁工程技术大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P273;P228.4

【参考文献】