Accuracy Test And Analysis For CORS-RTK Based On Single Base Station

CORS-RTK is the most important application of CORS system, it is a real-time differential positioning technology integrating with computer technology, network technology, communication technology and satellite positioning technology. Compared with normal RTK, CORS-RTK has the advantage of high positioning accuracy, wide range of services, high reliability and efficiency. This technology has been widely used in various industries.Currently, although multi-station CORS system has been a hot area of research for domestic and international scholars, but the burden for the small-scale units is too heavy to bear, so single-station CORS system becomes possible in the small and midium-sized cities and regions, with the reason of lower construction cost, shorter construction period, more sophisticated technology and easier expansion.The research of this paper is based on the single-station CORS system of Dalian university of technology(LGCORS). By completing the CORS system building and testing, a set of test method and implementation scheme of single-station CORS-RTK is summed up The research results include the following:(1) Based on the research about the achievements of the domestic and international scholars, we summarize the basic principle of the network RTK and the source of error, meanwhile we introduce some popular technology of network RTK, laying the theoretical foundation for the construction and test of LGCORS system.(2) By introducing the construction process of reference station, communication network, data center of LGCORS system, we summarize a construction scheme of single-station CORS system.(3) By researching and analysing the test program of network RTK, a set of test method and implementation scheme of single-station CORS-RTK is summed up.(4) Combined with Dalian continuous operational satellite positioning service system (DLCORS) and some B-level GPS points of Dalian, the test and evaluation of internally coincident precision, externally coincident presision, time availability, spatial accessibility, differential positioning uniformity, timeliness of positioning service and receiver compatibility is completed.