CORS网型结构对网络RTK服务性能的影响研究  

Impacts of CORS Network Structure for Real-Time Differential Positioning Service Performance

作　　者：张熙[1] 黄丁发[1] 廖华 周乐韬[1] 张德强[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都610031 [2]四川地震局减灾救助研究所,四川成都610014

出　　处：《武汉大学学报（信息科学版）》2015年第7期887-893,共7页Geomatics and Information Science of Wuhan University

基　　金：国家自然科学基金资助项目(41374032);国家863计划资助项目(2012AA12A209)~~

摘　　要：网型单元是CORS网络RTK的基本服务单元,定量评价网内各单元的服务能力对于指导和优化CORS网络建设有着积极作用。本文提出了一种基于主参考站服务能力的网型结构评价因子,结合美国CRTN网5个测站年积日2010.93的数据,分析了网型单元中不同主参考站对网络改正数精度的影响;并针对川渝CORS网络25万km2服务范围、82个三角服务单元,分析了网型结构与区域实时差分定位服务性能的关系。结果表明,CORS站网型结构是影响网络RTK定位服务性能的主要因素之一;本文提出的网型结构因子可用于100km级参考站网络网型结构的评价指标。The structural unit is the basic cell for CORS network RTK service. Evaluating the service performance of each unit quantitatively has a positive effect when guiding and optimizing the CORS network. In this paper, the priori variance distribution of atmospheric corrections is analyzed with a linear interpolation model （LIM）. An evaluation factor for the network structure is also proposed based on service performance of the structural unit. Five stations from CRTN net in U.S. （DOY 2010.93） are tested to understand the different performances with different stations used as the master reference station. Finally, the relationship between network structure and service performance is ana- lyzed in the Sichuan-Chongqing CORS （it has 82 triangle service units, with a service area covering 250,000 square kilometers）. Experimental results show that the CORS network structure is one of the main factors that affect the service performance of wide-area real-time differential positioning. The proposed network structure factor can be used for evaluating the structure of a CORS network with 100 km level baseline length.

关 键 词：CORS 网络RTK 服务性能 网型结构因子 

分 类 号：P228.41[天文地球—大地测量学与测量工程]