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COMMERCIAL JET TRANSPORT PILOTING TECHNIQUES
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English
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GERMERAAD, D., "COMMERCIAL JET TRANSPORT PILOTING TECHNIQUES," SAE Technical Paper 580154, 1958, https://doi.org/10.4271/580154.Also In
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- Doppler-Radar is now available for commercial transport use. All-weather determination of ground speed and drift angles can be obtained quickly and reliably. It requires no assistance from outside aids. Continuous current-position indication is possible by coupling this equipment with automatic computers-plotters plus airplane heading input Briefly, Doppler-Radar measures the aircraft's relative speed by determination of the shift in frequency of the return signal. This takes place as a function of the rate of change of target distance. By measuring at the bearing which provides the maximum frequency shift, drift angle and ground speed are found. The bearing is selected by transmitting the beams forward in a V-shaped pattern. Identical frequency shifts for each beam are found at that point where the drift angle is bisected by the āVā pattern. The difference in frequency shifts can also be used for drift angle computation