Doppler navigation

Doppler navigation

[′däp·lər ‚nav·ə′gā·shən]
(navigation)
Dead reckoning performed automatically by a device which gives a continuous indication of position by integrating the speed and the crab angle of the aircraft as derived from measurement of the Doppler effect of echoes from directed beams of radiant energy transmitted from the craft.

Doppler navigation

Doppler navigation
i. Dead reckoning performed automatically by a device that gives a continuous indication of position by integrating the speed derived from measuring the Doppler effect of echoes from directed beams of radiant energy transmitted from the craft. Most airborne Doppplers transmit three or four highly directional beams of frequency-modulated continuous-wave energy with a frequency of 8.8 GHz. These beams are directed from the aircraft as shown in the illustration. The Doppler computer analyzes the received reflections of these beams. By integrating the frequency changes of the four beams, the computer can determine the distance the aircraft has moved horizontally and vertically over the ground. The indicator shows the aircraft track, wind velocity, and ground speed.
ii. A system that determines positions based on the Doppler effect of satellite signals.
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References in periodicals archive ?
Flight navigator system is further divided into sub parts: Radar, Hyperbolic Navigation System, GNSS, Instrument Landing System, Inertial Navigation System, VOR/DME, Automatic Direction Finder, Doppler Navigation System, Flight Management System and Heads up Display.
Six of the aircraft had been recently modified with a Limited Night Recovery System (LNRS) as part of a program called Pave Imp, and a Doppler navigation system.
It is configured to carry one torpedo and is fitted with state of the art Pulse Compression Radar, Low Frequency Dipping Sonar Radar Warning Receiver and a Doppler Navigation System.
They are also capable of carrying torpedoes, fitted with sophisticated Pulse Compression Radar, Low Frequency Dipping Sonar, Radar Warning Receiver and Doppler Navigation System.
Wayne, NJ), received a $5-million contract for 85 AN/ASN-157 Doppler navigation sets.
leverages off the existing AN/ASN-128 Doppler Navigation System already installed on the UH-60 Blackhawk helicopter.

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