CORS System Construction And Precision Testing Of Chengdu University Of Technology

Network RTK technology generally need establish a CORS(Continuously Operating Reference Stations system),which a continuously reference station system. CORS is the system that within the study area,establishing a continuously operating reference station-based,data communications and Internet (LAN / WAN) technology for solving real-time differential correction information,and providing the different types,different needs,different automatically user tested different types of GPS observations (carrier phase,pseudo-range),all kinds of corrections,state information,and other related GPS services in real time.Currently,the domestic program of siting CORS system needs a lot of millions or even tens of millions of investment capital,while the burden for the small-scale application units becomes too heavy,the result in many industries and units expectes unattainably. Relative to the multi-station CORS system,single station CORS system is the system that a smaller,more sophisticated technology,data security,stability,wide operating range,short construction period,and the system can always upgrade and expansion.In the course of this study, learning a large number of network RTK and network RTK research application of the status quo at home and abroad.Studing and discussing the Continuous operating reference stations (CORS) techniques. Focusing on the CORS system differential positioning technology. On the basis of a CORS system construction project of Chengdu University of technology, completed the CORS system construction of Chengdu University of technology and system testing, mastered the principle of the CORS system, construction processes, application methods and verified by testing the accuracy CDUTCORS system within the scope in the design of high precision,reaching the desired objective of this study.The research results include the following:(1) Based on the research about the basics of network RTK, Network RTK draws on the research results at home and abroad, we completed the CDUTCORS systems, the various tests for the follow-up basis.(2) In order to compare and detect the positioning accuracy of the CDUTCORS system,we established a static control network.Through the CORS stations of the United States around,we obtained the control points results of the CGCS2000.(3) We completed the timeliness testing, usability testing of space, location accuracy testing and compatibility testing of the CDUTCORS system. Positioning accuracy test in which the system ,accuracy and the plane made a detailed analysis of the height accuracy.