| Satellite navigation and positioning technology spawned a huge satellite navigation service industry, the real-time dynamic (RTK) survey technology has been mature business application system, due to the technical convergence time is short, and the positioning accuracy is high, so it can widely used in precision navigation, cadastral survey project survey, topographic survey, digital mapping diagram of areas that are in need of real-time and high precision positioning, but the technology needs a lot of reference station, or huge CORS network support. Real time precision single point positioning technology, although long convergence time, positioning accuracy is relatively low, but its role in the area of a wide range of coverage, the need for a small base station, the cost is much lower, so there is a huge potential for development.(1) Two techniques have their own advantages, applications also have overlap, therefore, according to the actual need to choose, give full play to the advantages of two techniques, to achieve the maximization of benefit is a subject of great research and application value.(2) The aim of this paper is to accurately determine Beidou and GPS in real time PPP technology convergence time and location accuracy difference, Beidou and GPS Application in RTK technology, positioning accuracy at a variety of distances to determine accurate distance of conventional RTK, network RTK and real-time PPP equivalent accuracy; the compass and GPS, RTK and real-time PPP were horizontal and vertical cross comparison analysis.(3) At the same time, we discuss the stability and reliability of RTK and real-time PPP technology under a variety of conditions. Through the comparison and analysis, the compass is given in the similarities and differences of the real-time location phase and GPS, in the aspect of production and practice to the surveying and mapping work units using RTK or real-time PPP system is given a positioning accuracy and reliability of the reference. |
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