High-resolution signal-in-space measurements of VHF omnidirectional ranges using UAS

In this paper, we describe measurement results of the signal-in-space of very high frequency (VHF) omnidirectional range (VOR) facilities. In aviation VOR are used to display the current course of the aircraft in the cockpit. To understand the influence of wind turbines (WT) on the signal integrity...

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Bibliographic Details
Published inAdvances in radio science Vol. 17; pp. 1 - 10
Main Authors Schrader, Thorsten, Bredemeyer, Jochen, Mihalachi, Marius, Ulm, David, Kleine-Ostmann, Thomas, Stupperich, Christoph, Sandmann, Sergei, Garbe, Heyno
Format Journal Article
LanguageEnglish
Published Katlenburg-Lindau Copernicus GmbH 19.09.2019
Copernicus Publications
Subjects
Aircraft
Analysis
Aviation
Cockpit displays
Computer simulation
Displays (Marketing)
Field strength
Frequency modulation
Methods
Numerical analysis
Position measurement
Radar
Radio frequency
Signal integrity
Signal processing
Turbines
Unmanned aerial vehicles
Very high frequencies
VHF omnidirectional range
Wind effects
Wind turbines
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Summary:In this paper, we describe measurement results of the signal-in-space of very high frequency (VHF) omnidirectional range (VOR) facilities. In aviation VOR are used to display the current course of the aircraft in the cockpit. To understand the influence of wind turbines (WT) on the signal integrity of terrestrial navigation and radar signals, the signal content and its changes, respectively, must be investigated. So far, only numerical simulations have been carried out on the frequency-modulation (FM) part of the Doppler-VOR (DVOR) signal to estimate the influence of WT on DVOR. Up to now, the amplitude-modulated (AM) part of the DVOR was not assessed at all. In 2016, we presented an unmanned aerial system (UAS) as a carrier for state-of-the-art radio-frequency (RF) measurement instrumentation (Schrader et al., 2016a, c; Bredemeyer et al., 2016), to measure and to record the true signal-in-space (both FM and AM signal) during the flight. The signal-in-space (which refers to time-resolved signal content and field strength, respectively) is measured and sampled without loss of information and, furthermore, synchronously stored with time stamp and with precise position in space, where the measurements were taken.
ISSN:1684-9973
1684-9965
1684-9973
DOI:10.5194/ars-17-1-2019