| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an accurate observation data by providing an auxiliary antenna receiving a pilot signal, system gain compensating means, and the like. SOLUTION: The water or moisture film generated on the surface of radome 1 at the time of rainfall attenuates transmission and reception signals from and to the radome 1. By use of the characteristic a pilot signal is transmitted from an antenna 2 and an auxiliary antenna 11 receives it, however, the reception power varies only by the attenuated quantity by the film at the time of fair and rainy conditions. The difference of reception power between the fair time and rainy time is recorded for correcting the system gain of radar means, thereby ensuring the intensity of power for accurate reception.</p> |
