Research Of GPS Carrier Phase Relative Positioning Technology

Global Positioning System (GPS) is a real-time, all-weather, full range of positioning systems. The original objection of designing such system is only servicing for military, but now it has been extended to many civilian areas, including civil navigation and control, traffic management, surveying and mapping science and technology, civil engineering, space science and so on. With the continuous improvement of the global positioning system, perfective of hard and soft parts, applications are constantly developing. In this paper, according to the characteristics of GPS, introduces a more integrity method of data solution about relative positioning, using the data that collected by GPS receivers to calculate the satalite position, combining polynomial fitting and double-difference carrier phase observations to detect and repair cycle slip. This paper introduces several methods for solving ambiguity, especially analys LAMBDA method, by computer simulating, that the LAMBDA method is the best way to solve ambiguity. With the using precise carrier phase measurements and basing on GPS positioning method and principle, introduces carrier phase positioning technologies, Include single model, double model and three model . At last,according to the needing of project, introducing using BURSA 7-Parameter Transformation to change the coordinate of different coordinate system.