Accession Number : AD0164894

Title :   Radar Altimeters for Automatic Landing Systems.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Kraft,Sidney ; Preston,Francis R.

Report Date : 04 JUN 1974

Pagination or Media Count : 5

Abstract : The patent relates to an improvement on radar altimeters particularly as used in automatic landing systems where the altimeter will read only decreasing altitude and remain constant for increases in altitude caused by terrain variations, the result is accomplished by providing a lag network to allow the sensing of an increasing or decreasing altitude signal, an electronic switch is operated from the output of a differential amplifier cutting off the input on an increasing altitude signal. The altimeter is governed by an isolation amplifier controlled by the input signal and lag network.

Descriptors :   *Radio altimeters, *Patents, Instrument landings, Automatic, All weather

Subject Categories : Flight Control and Instrumentation
      Air Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE