| 摘要 |
PURPOSE:To track a flying object with an accurate directivity accuracy at all times by obtaining a correcting value of an estimated orbit data from a reception signal obtained through the superimposition of a series of angular offset values on the estimated orbit data. CONSTITUTION:A program controller 8 superimposes an offset control signal on the estimated orbit data of a flying object at a prescribed time interval for, e.g., 1- several tens of cycles and drives an antenna device 1. The S/N is improved and a signal burried in noise is detected by subtracting a background noise level obtained between a time t31 and a time t32 from a reception level obtained from a time t11 to a time t12 and from a t21 to a time t22. |
