| 摘要 |
PROBLEM TO BE SOLVED: To shorten a processing time and to improve precision on initial alignment, and to improve convenience in operation. SOLUTION: Standard position coordinates (latitude and longitude) where an airplane is positioned are inputted in an inertia navigation device in course alignment. Then, magnetic bearing angle information is detected by using a magnetic compass, and true north azimuth information (true north standard:ϕ) is obtained from the difference between its value and magnetic variance corresponding to the standard position coordinates. The attitude standard (θ,ϕ) is determined by averaging the accumulated value of sensor data of a laser gyro or the like. Fine alignment is executed, and the error of the true north- attitude standard determined by the course alignment by using a technique such as a Kalman filter or the like is estimated, to thereby determine the true north-attitude standard. |
