| 摘要 |
<p>An aircraft radar altimeter includes a programmed microcontroller (22) which permits effective simultaneous tracking of at least two targets such that, for example, both ground and obstacles on the ground can be simultaneously tracked, thus avoiding crashes when the aircraft is operating at very low altitudes. The microcontroller (22) is operatively coupled to the radar transmitter (29) and to the receiver (34, 36, 40) so that information relating to a first target can be stored away while a search and track operation is run on a second target. The information concerning a detected second target is likewise stored away and the microcontroller permits alternate tracking of the two targets with the stored information being used as the basis for establishing an initial position for a target when tracking of that target is resumed. <IMAGE></p> |
