navigation system, GPS, global positioning system, system analysis, clock synchronous navigation system, precision, algorithm, navigation method based on least squares, satellite based navigation, satellite constellation, asynchronous navigation system, dilution of precision
その他のタイトル（英）
Theoretical basis of satellite-based navigation and it's application
Presumed that navigation system such as GPS (Global Positioning System) is necessitated continuously over the future, this paper reported the system analysis conducted to study concept design of the navigation system which is possible to succeed developmentally GPS and simulation result conducted to evaluate performance of the system. First the present condition and the principle of satellite navigation are described, and navigation method and its precision are studied analytically and formulated. After that, following studies are conducted: varieties of typical satellite constellations samples and their tradeoffs, relation between the constellations and navigation accuracy, ground station support to enhance the precision, and intelligent user terminals. Following items are also studied: coexistence of the navigation method based on clock synchronization and asynchronous navigation method such as GPS, and navigation method based on the weighting coefficients variable least-squares method. From the algorithm, DOP (Dilution of Precision) is determined, which expresses generally the precision of various navigation method.
衛星航法の基礎理論とその応用
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