RTK-GPS測位における伝送遅延に関する研究

概要

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Real-time kinematic (RTK) GPS is a technique which allows a mobile user to measure its position with a cm-level precision in real-time by using carrier-phase differential corrections of reference stations. The RTK technique has found a number of industrial applications in the various areas. One of the problems of the RTK-GPS positioning is communication delay between the rover receiver and the reference station. The RTK-GPS system generally requires a continuous wireless transmission link to transmit raw observation data or correction messages from the reference station to the remote rover. Recently, the RTK-GPS has been applied to precise navigation of mobile platforms such as cars or aircrafts. One of the problems in such mobile application environment is communication delay. In this paper, we proposed new methods to correct satellite clock bias and ionospheric delay errors caused by the communication delay. In order to evaluate the proposed methods, we investigated fix rates and positioning accuracy in the existence of up to 30-second communication delay in several baseline lengths.
社団法人日本航海学会の論文
2008-09-25