| Summary: | 碩士 === 國立成功大學 === 地球科學系專班 === 96 === Along with the improvement of communication technique, conventional single master station RTK positioning has evolved to a new technique - Virtual Master Station (VMS) Real Time Kinematic (RTK). Since the master station is located within the Tainan County, the e-GPS system (VMS-RTK) in Tainan belongs to a regional network service and in order to know the service boundary of the Tainan e-GPS system, a test on its practicability is necessary. The most distant test site in this experiment is Hsilo; however its positioning accuracy does not deteriorate with the increase of the distance. Besides Pei-shin junior high school, the horizontal position accuracy of other test sites is within 1.8 cm, the height component accuracy within 3.8 cm. As a result, the service boundary of the Tainan e-GPS system can cover Yunlin and Chiayi areas.
We also test the positioning accuracy of the sites outside the Tainan County e-GPS system. Test results show that the accuracy is similar between those within and outside the network, the horizontal positioning accuracy of VMS-RTK is within 2.3 cm and the height components accuracy within 3.5 cm. The network positioning accuracy of Chigu, Guanmiao and Nanhwa master stations is not as good as the other master stations, whose horizontal positioning accuracy is within 1.3 cm and within 2.6 cm for the height component.
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