The Research Of Geo XT Handset Precision Which Based On CORS

With the production process improvement and cost reduction of GPS handset, moreand more handsets are emerging, and the accuracy is Continuously improving, TrimbleGeo XT Series handset is one of the outstanding works in a number of handsets, It‘ssmall size，easy to carry，Independent use of positioning and navigation equipment，which has All-weather， all-round， real-time， three-dimensional navigation andpositioning capabilities，and has high sensitivity, precision, automation, low cost, easeof use etc.The technology and development of CORS is increasingly sophisticated, whichmakes the accuracy and the distance of conventional RTK have been greatly improved.As advances in network technology, computer network management, radiocommunications technology and other factors, Making the handset connection with theCORS station become possible. Handset CORS-RTK system makes it more convenientto measure，While the accuracy of the system is the focus of the study.Paper describes the factors affecting the accuracy of GPS measurements, andsummarizes them; Through the measured data of Geo XT handset makes a comparativeanalysis which is relative to the accuracy of conventional RTK; Through the dataanalysis of the CORS-RTK system which composed by Geo XT handset and CORSobtains useful conclusions. In addition， Making a useful experimental test ofhandheld CORS-RTK system which composed by Geo XH6000handset and R8CORSstation, getting a meaningful conclusion.