| 摘要 |
PURPOSE:To improve a detection probability and an angle-measuring accuracy, by a method wherein an electron scanning mode within a vertical surface to a given target or an air area, is brought to a stop, and a detecting mode produced by means of only a beam covering said target or air area can be selected. CONSTITUTION:If a given magnetic inclination and elevation angle region are inputted, an assignment signal (m) is added to an information processing circuit 16 from an indication circuit 15. When an electron scanning attains a given magnetic declination range determined by the given target or given air area, the information processing circuit 16 transmits an electron scanning mode switching signal (n) to add it to a reference signal generating circuit 7, and an electron scanning mode is switched to a detecting mode produced by means of only a beam covering said target or air area. This permits the improvement of a detection probability and an angle-measuring accuracy through increasing of a reception signal from said signal. |
