POSITIONING SYSTEM, POSITIONING METHOD, AND CAR NAVIGATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a positioning system and a car navigation system capable of positioning precisely a position of a moving object even when the number of receivable GPS satellites is not sufficient. SOLUTION: This positioning system 10 capable of controlling cooperatively the positioning using radio waves transmitted from the artificial satellites and the positioning by a self-contained navigation method to estimate the position of the moving object extracts a point with the minimum distance with respect to an inertia positioning position positioned by the self-contained navigation method, out of a range positioned using the radio waves, when the number of the captured satellites is less than three, and estimates the point as the satellite positioned position positioned using the radio wave. COPYRIGHT: (C)2007,JPO&INPIT