Method for measuring height and detecting obstacles, radio altimeter and aircraft

摘要

The radio altimeter (5) has an evaluation element for determining a dangerous level of detected obstacles. A display element (30) comprises a display unit (32) for displaying information relative to the detected obstacle having high danger level. A control unit (50) is connected to a switching unit (40) for connecting a main emitting-receiving element (21) and a secondary emitting-receiving element (22) with a generator-receiver (10) along a cycle and for changing the cycle if the obstacle is detected. An independent claim is also included for a method for securing a flight of an aircraft.