ロランC電波の短周期伝搬遅延時間変動

概要

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Recently, radio-aided positioning system mainly depends on the GNSS (Global Navigation Satellite System) , for example, GPS (Global Positioning System). However, losses of GNSS service whether accidental or otherwise can have economic and political consequences. Therefore as a combination of complementary systems, modernization of the only existing regional navigation system, Loran-C system is being considered. In Japan, the Northwest Pacific Loran-C Chain is in operational (Table 1). The position accuracy obtained by Loran-C system is 30 to 300 meters. A method to reduce error is the Differential Loran-C system, but it has been reported that the Differential Loran-C is difficult to reduce error in some situations. In this paper, TDs of Loran-C are measured at several points and applicability of the Differential Loran-C system is confirmed.
宇部工業高等専門学校の論文