Pulse Sounding with Closely Spaced Receivers as a Tool for Measuring Atmospheric Motions and Fine Structure in the Ionosphere: VIII. Application to Aircraft Signals
W. Pfister
јан 1975. · Air Force Cambridge Research Laboratories, Air Force Systems Command, United States Air Force
E-knjiga
23
Stranica
O ovoj e-knjizi
Signals transmitted from an aircraft and received on the ground are characterized by a Doppler shift which falls outside the principal range of the instrument from -2 to +2 Hz. A data processing technique combines the Fourier spectra of three interlaced sets of data in such a way that the shifted Doppler range includes the spectrum of the aircraft signal. The shift can be either preselected or determined from the signal itself. Printouts of Fourier spectra computed by both methods are compared.
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