| 摘要 |
PURPOSE:To confirm a self-position by only a measured angle, by selecting in advance three target spots whose position is known, deriving an azimuth of said three target spots seen from the self-position, and calculating the self-position by trigonometry basing on the obtained azimuth. CONSTITUTION:A point O, a point A and a point B show three points whose position on the map is definite. A point P shows a present spot of a running car of a moving radar. From this present spot P, angles theta1, theta2 between the point O, and the point A and the point B are measured by a telescope. Subsequently, when a circumscribed circle of DELTAOPA and DELTAOPB is considered, the center angle against a chord OA and a chord OB is two times of a measured angle. Accordingly, when positions of the point O, the point A and the point B are already known, the center coordinate of the circumscribed circle is calculated and an equation is led. |
