Method of Unambiguous Measuring the Distance Between an Aircraft and Two or More Ground Responder-Stations and the Device for Realization of This Method

摘要

In the aircraft multichannel receiver, the signals from the ground transponders are divided by one heterodyne signal from the generator of an UHFtransmitter. The different frequency pulses separated from the output of detectors of each receiver channel are fed to one pulse mixer to activate the CRT scanner, and the difference in frequency of low frequency sinusoidal oscillations separated also from the output of detectors are transformed into pulses and are fed together with the output pulses of the mixer to another pulse mixer to obtain on CRT screen an image of the measuring brightness markers. Indications from the screen are continuously photographed on a moving photo film of photo recorder. The total distance is determined by the disruption in curve recording of continuously changing distances, forming at the moment of switching over the oscillation frequencies, modulating the carrier frequencies of signals coming from aircraft station and responders.