Introduction to the Theory of Transformation Groups

A method for guiding a flying vehicle having a light receiver by directing a spirally scanning beam at the light receiver. A repetition reference time of the scanning of the light beam is stored in the flying vehicle before it is launched. After the flying vehicle has been launched the radiation angle of the spirally scanning light beam is controlled according to the lapse of time after launching of the flying vehicle so as to maintain a scanning area of the scanning light beam on the light receiver constant. In flight, the flying vehicle is guided so as to be on the center of the light beam according to information on a displacement of the flying vehicle from the center of the light beam and information on a displacement angle from a reference axis of the light beam determined from a period of time during which the light receiver receives the light beam.