| 摘要 |
PROBLEM TO BE SOLVED: To reduce a difference between an actual position and a position of a moving object estimated by autonomous navigation or satellite navigation.SOLUTION: A reliability derivation device determines a reliability showing the degree of reliability of positioning information obtained from a satellite, on the basis of determination threshold. The reliability derivation device calculates a distance difference value between a satellite navigation distance of a moving object calculated on the basis of positioning information and an autonomous navigation distance of the moving object calculated on the basis of sensor information obtained from an autonomous navigation sensor. The reliability derivation device updates the determination threshold on the basis of a subtraction value indicative of a difference between a first distance difference value and a second distance difference value calculated a prescribed time after the first distance difference value. |
