Title :
Radio Doppler Effect for Aircraft Speed Measurements
Author :
Malling, Leonard R.
Author_Institution :
Formerly, Boeing Aircraft Company, Seattle, Wash.; now, Malling Laboratories, Seattle, Wash.
Abstract :
Measurement of the ground speed of aircraft by the use of the radio doppler effect is discussed, and the technical details of one complete system are presented. In this particular system, radio signals are transmitted from the ground, received in an airplane, and retransmitted to the ground for measurement of the doppler beat frequency. An accuracy of 0.1 per cent is obtained using simple techniques for frequency stabilization. Some experimental results of flight tests are given.
Keywords :
Aircraft; Airplanes; Calibration; Doppler effect; Frequency measurement; Oscillators; Performance evaluation; Testing; Timing; Velocity measurement;
Journal_Title :
Proceedings of the IRE
DOI :
10.1109/JRPROC.1947.233900
