Short-Term variability of the lower ionosphere from VLF narrowband radio observations

Israel Silber, Colin Price

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Very low frequency (VLF) radio waves propagate over long distances within the Earth-ionosphere waveguide, reflected off the Earth's surface and the ionospheric D-region. The characteristics of these signals depend on several parameters along the path, which apart from the D-region's properties, are fairly constant over short periods of time. This allows probing of perturbations in the lower ionosphere to be made using VLF measurements. In this paper, we present an analysis of VLF narrowband signals, transmitted from Sicily, Italy, and detected in Tel-Aviv, Israel. We show observations of the interaction between both pressure waves and electromagnetic perturbations from thunderstorms with the VLF waves aloft. We clearly observe long period acoustic wave signatures (up to 4 minutes) and short period gravity wave signatures (5-10 minutes), while also many transient events related to heating and ionization of the D-region. Comparisons with the World Wide Lightning Location Network (WWLLN) data show the possible link between tropospheric thunderstorms and D-region short-Term variability. Finally, we conclude that gravity wave signatures are a common and significant feature in VLF measurements.

Original languageEnglish (US)
Title of host publication2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-4
Number of pages4
ISBN (Electronic)9789082598704
DOIs
StatePublished - Nov 10 2017
Event32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017 - Montreal, Canada
Duration: Aug 19 2017Aug 26 2017

Publication series

Name2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
Volume2017-January

Other

Other32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
CountryCanada
CityMontreal
Period8/19/178/26/17

Fingerprint

D region
lower ionosphere
very low frequencies
radio observation
Ionosphere
narrowband
Thunderstorms
Gravity waves
thunderstorms
frequency measurement
signatures
gravity waves
Earth (planet)
Radio waves
Earth-ionosphere waveguide
Lightning
Sicily
perturbation
Israel
Ionization

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Instrumentation
  • Radiation

Cite this

Silber, I., & Price, C. (2017). Short-Term variability of the lower ionosphere from VLF narrowband radio observations. In 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017 (pp. 1-4). (2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017; Vol. 2017-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.23919/URSIGASS.2017.8105361
Silber, Israel ; Price, Colin. / Short-Term variability of the lower ionosphere from VLF narrowband radio observations. 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017. Institute of Electrical and Electronics Engineers Inc., 2017. pp. 1-4 (2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017).
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title = "Short-Term variability of the lower ionosphere from VLF narrowband radio observations",
abstract = "Very low frequency (VLF) radio waves propagate over long distances within the Earth-ionosphere waveguide, reflected off the Earth's surface and the ionospheric D-region. The characteristics of these signals depend on several parameters along the path, which apart from the D-region's properties, are fairly constant over short periods of time. This allows probing of perturbations in the lower ionosphere to be made using VLF measurements. In this paper, we present an analysis of VLF narrowband signals, transmitted from Sicily, Italy, and detected in Tel-Aviv, Israel. We show observations of the interaction between both pressure waves and electromagnetic perturbations from thunderstorms with the VLF waves aloft. We clearly observe long period acoustic wave signatures (up to 4 minutes) and short period gravity wave signatures (5-10 minutes), while also many transient events related to heating and ionization of the D-region. Comparisons with the World Wide Lightning Location Network (WWLLN) data show the possible link between tropospheric thunderstorms and D-region short-Term variability. Finally, we conclude that gravity wave signatures are a common and significant feature in VLF measurements.",
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Silber, I & Price, C 2017, Short-Term variability of the lower ionosphere from VLF narrowband radio observations. in 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017. 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017, vol. 2017-January, Institute of Electrical and Electronics Engineers Inc., pp. 1-4, 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017, Montreal, Canada, 8/19/17. https://doi.org/10.23919/URSIGASS.2017.8105361

Short-Term variability of the lower ionosphere from VLF narrowband radio observations. / Silber, Israel; Price, Colin.

2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017. Institute of Electrical and Electronics Engineers Inc., 2017. p. 1-4 (2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017; Vol. 2017-January).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Silber I, Price C. Short-Term variability of the lower ionosphere from VLF narrowband radio observations. In 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017. Institute of Electrical and Electronics Engineers Inc. 2017. p. 1-4. (2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017). https://doi.org/10.23919/URSIGASS.2017.8105361