| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna azimuth controller that recognizes an accurate magnetic declination so as to control an antenna of a relay vehicle to be directed in an accurate azimuth. SOLUTION: A navigation device 12 calculates a detected traveling azimuth of the relay vehicle tying two points of the vehicle. An earth magnetism sensor 13 senses the azimuth in which the relay vehicle is directed. The magnetic declination is calculated from an error between the traveling azimuth and the relay vehicle azimuth. Further, a position of a base station is obtained from a base station position information database 16 and the azimuth of the base station from the relay vehicle is calculated on the basis of the position of the base station and the position of the relay vehicle. The antenna azimuth is calculated on the basis of the relay vehicle azimuth, the magnetic declination, and the azimuth of the base station from the relay vehicle. |
