Patent ID: 8234091

Claim:
An angular velocity sensor correcting apparatus comprising: an obtaining unit for obtaining measurement data of an object measured on the basis of a signal from a GPS satellite and angular velocity of the object output from an angular velocity sensor; an angular velocity conversion coefficient deriving unit for sequentially deriving a temporary angular velocity conversion coefficient of the angular velocity sensor on the basis of the measurement data and the angular velocity obtained by the obtaining unit; and an angular velocity conversion coefficient filter process unit for deriving an angular velocity conversion coefficient of the angular velocity sensor for correcting the angular velocity output from the angular velocity sensor by executing a statistical process on the temporary angular velocity conversion coefficient of the angular velocity sensor sequentially derived by the angular velocity conversion coefficient deriving unit, wherein the angular velocity conversion coefficient filter process unit changes a forgetting factor in the statistical process in accordance with a difference between an angular velocity conversion coefficient of the angular velocity sensor derived in the past in the angular velocity conversion coefficient filter process unit and an average value of temporary sensitive coefficients of the angular velocity sensor sequentially derived by the angular velocity conversion coefficient deriving unit.