초록 ▼

An aircraft microwave altimeter system has a threshold detector with two parallel channels that provide two sets of output signals at two different levels of sensitivity. The signals at the higher sensitivity are supplied to a display whereas those at the lower sensitivity are supplied to a navigati

An aircraft microwave altimeter system has a threshold detector with two parallel channels that provide two sets of output signals at two different levels of sensitivity. The signals at the higher sensitivity are supplied to a display whereas those at the lower sensitivity are supplied to a navigation system. A comparator indicates a fault in the system if the two sets of output signals differ by more than a predetermined amount.

대표청구항 ▼

An aircraft microwave altimeter system comprising: means for transmitting microwave signals to the ground; means for receiving microwave signal reflected from the ground and objects on the ground; means for deriving from the received signals information as to the height of the aircraft above the gro

An aircraft microwave altimeter system comprising: means for transmitting microwave signals to the ground; means for receiving microwave signal reflected from the ground and objects on the ground; means for deriving from the received signals information as to the height of the aircraft above the ground or objects on the ground; threshold detector means, said threshold detector means being arranged to provide a first set of output signals in accordance with height at a first threshold level, and a second set of output signals in accordance with height at a second threshold level greater than said first threshold level; display means; means supplying said first set of output signals to said display means; navigation means; and means supplying said second set of output signals to said navigation means, such that said navigation means is supplied with signals representative of the height of the aircraft above ground whereas said display means is supplied with signals representative of the height of the aircraft above objects on the ground.