Navigation apparatus and navigation information calculation method

摘要

A navigation apparatus 1 includes: a section 31 that calculates a mobile object's acceleration in the direction of the motion, based on the mobile object's speed calculated from information received from a satellite; a section 32 that calculates lateral acceleration whose direction is perpendicular to the mobile object's motion, based on the mobile object's speed and direction calculated from information received from the satellite; an acceleration sensor 5 that observes motion acceleration of the mobile object and gravity acceleration; a section 22 that calculates an altitude difference of road based on an atmospheric pressure value supplied from a barometric sensor; a section 10 that calculates an inclination angle of the road in the direction of the motion, based on the altitude difference and a travel distance corresponding to the mobile object's speed; and a section 33 that calculates an attachment angle of the acceleration sensor with respect to the mobile object by using a multidimensional function formula.