Design and validation of probes and sensors for the characterization of magneto-ionic radio wave propagation on Near Vertical Incidence Skywave paths

Ben A. Witvliet, Rosa M. Alsina-Pagès, Erik van Maanen, Geert J. Laanstra

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

his article describes the design and validation of deployable low-power probes and sensors to investigate the influence of the ionosphere and the Earth’s magnetic field on radio wave propagation below the plasma frequency of the ionosphere, known as Near Vertical Incidence Skywave (NVIS) propagation. The propagation of waves that are bent downward by the ionosphere is dominated by a bi-refractive mechanism called ‘magneto-ionic propagation’. The polarization of both downward waves depends on the spatial angle between the Earth’s magnetic field and the direction of propagation of the radio wave. The probes and sensors described in this article are needed to simultaneously investigate signal fading and polarization dynamics on six radio wave propagation paths. The 1-Watt probes realize a 57 dB signal-to-noise ratio. The probe polarization is controlled using direct digital synthesis and the cross-polarization is 25–35 dB. The intermodulation-free dynamic range of the sensor exceeds 100 dB. Measurement speed is 3000 samples/second. This publication covers design, practical realization and deployment issues. Research performed with these devices will be shared in subsequent publications.
Original languageEnglish
Article number2616
Number of pages16
JournalSensors (Switserland)
Volume19
Issue number11
DOIs
Publication statusPublished - 9 Jun 2019

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Radio Waves
Radio waves
radio waves
Wave propagation
Ionosphere
wave propagation
incidence
Magnetic Fields
Polarization
ionospheres
propagation
probes
sensors
Incidence
Sensors
polarization
Earth (planet)
signal fading
Signal-To-Noise Ratio
Magnetic fields

Keywords

  • deployable
  • magneto-ionic
  • magnetic field
  • polarization
  • ionosphere
  • radio wave propagation
  • Near Vertical Incidence Skywave (NVIS)
  • circular polarization

Cite this

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title = "Design and validation of probes and sensors for the characterization of magneto-ionic radio wave propagation on Near Vertical Incidence Skywave paths",
abstract = "his article describes the design and validation of deployable low-power probes and sensors to investigate the influence of the ionosphere and the Earth’s magnetic field on radio wave propagation below the plasma frequency of the ionosphere, known as Near Vertical Incidence Skywave (NVIS) propagation. The propagation of waves that are bent downward by the ionosphere is dominated by a bi-refractive mechanism called ‘magneto-ionic propagation’. The polarization of both downward waves depends on the spatial angle between the Earth’s magnetic field and the direction of propagation of the radio wave. The probes and sensors described in this article are needed to simultaneously investigate signal fading and polarization dynamics on six radio wave propagation paths. The 1-Watt probes realize a 57 dB signal-to-noise ratio. The probe polarization is controlled using direct digital synthesis and the cross-polarization is 25–35 dB. The intermodulation-free dynamic range of the sensor exceeds 100 dB. Measurement speed is 3000 samples/second. This publication covers design, practical realization and deployment issues. Research performed with these devices will be shared in subsequent publications.",
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Design and validation of probes and sensors for the characterization of magneto-ionic radio wave propagation on Near Vertical Incidence Skywave paths. / Witvliet, Ben A.; Alsina-Pagès, Rosa M.; van Maanen, Erik; Laanstra, Geert J.

In: Sensors (Switserland), Vol. 19, No. 11, 2616, 09.06.2019.

Research output: Contribution to journalArticleAcademicpeer-review

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AU - Laanstra, Geert J.

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