首页>
外国专利>
On-ground radio altimeter calibration system
On-ground radio altimeter calibration system
展开▼
机译:地面无线电高度计校准系统
展开▼
页面导航
摘要
著录项
相似文献
摘要
To ensure that a radio altimeter indicates zero altitude when the aircraft is on the ground, an on-ground calibration system utilizes a calibration switch to initiate a calibration radio altimeter signal from the radio altimeter's transmitter section which is reflected off of the ground and received by the altimeter's receiver section. The time delay between transmission and reception of the signal is measured and a value representing the delay is stored in the altimeter's microprocessor. This value corresponds to zero altitude and can be used as the relative zero point for calculating altitudes of the aircraft when it is in flight.
展开▼