Construction And Research On CORS And Its Application In Jiangsu Oil Field Pipeline Detection

With the rapid progress and wide use of GPS technology ,it has become increasingly important role in measurement. At present, use multi-base station network RTK technology to set up Continuous operational Satellite Service integrate system has become one of the hot spots of City GPS Application development.Traditional GPS RTK measurement mode are based on the district have high-grade GPS points or country Geodetic points, through frequently set up base station to develop lower control points or wire points, and thus complete the entire survey region.This have difficult in Harsh conditions or in some regions which country points have serious damage.Using RTK operate under CORS system provides a new model, it can set up the circumstances baseline at the survey area have no control point, at the same time as long as the measurement conditions can meet the need of the RTK operation, errors are not accumulate and accuracy will not reduce.This is undoubte the great changes to traditional measurement.Its main advantages embodied in: 1) improved initialization time, and expand the effective work scope ; 2) Using continuous base station, users can observe at any time, easy to use, improve the working efficiency; 3) a comprehensive data monitoring system can effectively eliminate the systematic errors and cycle slips, and enhance the reliability of differential operation; 4) users do not need to set up reference station, really achieve single operation, reducing costs; 5)using fixed-reliable data link communication, decreasing noise interference; 6)provide remote INTERNET services and realize data sharing; 7)expand the application of GPS in dynamic field, and is more conducive to vehicles, aircraft and ship's precision navigation; 8) it provides a new opportunities for the construction of Digital City.This article finished following the outcomes:1.Introduce the principle of differential GPS and its technology, and detail analysis three main CORS technology (VRS, FKP,MAC) it offer a theoretical guidance for the construction of CORS system.2.Detail analysis the overall design of JSCORS and the construction of sub-systems should be taken into account, and depth described all aspects of JSCORS construction.3.Use the measured data to test JSCORS system's property, location-based services test, single point positioning accuracy test, dynamic accuracy test, inside and outside accuracy test, test the overall property of JSCORS system to provide RTK users services.4.Use real-time precise differential information provided by JSCORS for RTK user to do Jiangsu Oilfield pipeline detection work, it improve the efficiency and achieved good effect5.Deeply analysis the RTK error under JSCORS, especially for the error of coordinate transformation, and put forward a number of innovative points, analysis causes of error from Multi-angle and many aspects...