| 摘要 |
PROBLEM TO BE SOLVED: To precisely position a location etc. of a mobile body by appropriately combining the calendar data of the navigation message and the prediction data of the precise calendar. SOLUTION: A positioning device for mobile body of this invention is provided with a means for receiving the calendar data of a navigation message, a means for receiving prediction data of the precise calendar data, a satellite location calculating means for calculating the location of the satellite using both the calendar data and the prediction data of the precise calendar, and a positioning means for positioning the location or speed of the mobile body using the calculated location of the satellite. The satellite location calculating means is characterized by using the weighted average of calendar data and the prediction data of the precise calendar using the weight corresponding to the freshness of data at least on the basis of either of the data between the calendar data and the prediction data of the precise calendar. COPYRIGHT: (C)2009,JPO&INPIT
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