| 摘要 |
<p>PURPOSE:To obtain a flying object monitoring device when can measure the altitude of a flying object with high accuracy without relying on an airborne transponder. CONSTITUTION:By forming fan-shaped beam surfaces intersecting each other at right angles and respectively oscillating the surfaces in orthogonal directions, slant ranges are respectively found from a time difference between transmitted pulse signals and the reflected pulse signals of the transmitted pulse signals from a target flying object at the moment the reflected pulse signals are received and, in addition, the deviated angle of each antenna beam is found at the same moment. Then the altitude and ground range of the target flying object is calculated by respectively assuming circular arcs having radii equal to slant ranges on the beam surfaces of a first and second antennas 1 and 2 based on the information and finding the intersection of both arcs. The calculated height and ground range are displayed on a display 11.</p> |
