| 摘要 |
PROBLEM TO BE SOLVED: To allow DGPS positioning with sure in short time after a power source is turned on. SOLUTION: DGPS information broadcasted with FM multiplex is received with an FM multiplex broadcast receiver, which is inputted in a navigation device 21, and the position measured with GPS is corrected, based on the DGPS information. The FM multiplex broadcast receiver saves a station information of a DGPS station which can be received in a memory 15 which keeps data after a power source is turned off, and gets DGPS information by receiving DGPS station which is preserved at power-on, and the navigation device 21 corrects a position obtained by GPS positioning, based on the DGPS information. |
