| 摘要 |
<p>An alarm restraining system in an apparatus for preventing collision of aircraft which restrains useless alarms produced by the apparatus responsive to signals from other approaching aircraft that are flying at a lower altitude and that are virtually not likely to collide during the takeoff or landing. The system restrains useless alarm that may be produced responsive to signals emitted from other aircraft that are staying in the airfield or that are running along the runway, by decreasing an alarm limit value or by setting it to zero on the side of lower altitudes, by estimating the atmospheric pressure in the nearby airport based upon the altitude data on the aircraft and the data on atmospheric pressure, and further relying upon the altitude value found from the above estimated value and the data on atmospheric pressure contained in the response signals from other aircraft, upon the data on atmospheric pressure in the nearby airport received from the airport center, and upon the altitude value based upon the data on atmospheric pressure contained in the response signals from other aircraft.</p> |
