Journal ArticleDOI
Waveguide model analyses of Omega VLF wave propagation at 13.6 kHz
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TLDR
In this paper, the diurnal variations of the phase and amplitude of VLF waves on a frequency of 13.6 kHz propagated over the west-to-east transequatorial path from La Reunion to Inubo, Japan, are analyzed.About:
This article is published in Journal of Atmospheric and Solar-Terrestrial Physics.The article was published on 1986-01-01. It has received 10 citations till now. The article focuses on the topics: Diurnal phase shift & Ionospheric reflection.read more
Citations
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Observation of an ionospheric disturbance caused by a gamma-ray burst
Gerald J. Fishman,Umran S. Inan +1 more
TL;DR: The first observation of an ionospheric disturbance from a gamma-ray burst is reported in this article, where the total fluence was 0.002 erg/sq cm, most of which occurred in the first 4 s of the burst.
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The 25 April 2015 Nepal Earthquake: Investigation of precursor in VLF subionospheric signal
Ajeet K. Maurya,K. Venkatesham,Prabhakar Tiwari,K. Vijaykumar,Rajesh Singh,Ajay Singh,Durbha Sai Ramesh +6 more
TL;DR: In this paper, the authors present a critical analysis of the observations and interpretation of VLF sub-ionospheric measurements related to the main Nepal Gorkha earthquake which occurred on April 25, 2015 (Mw7.8) and its major aftershock on May 12, 2015(Mw 7.3).
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The Effect of Modal Interference on VLF Long-Range Lightning Location Networks Using the Waveform Correlation Technique
TL;DR: The arrival time difference (ATD) long-range very low frequency (VLF) lightning location network owned and operated by the Met Office, locating lightning using a waveform correlation technique as discussed by the authors.
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Reflection of VLF radio waves at a junction in the Earth-ionosphere waveguide
TL;DR: The conditions for the neglect of reflection of VLF modes incident on a junction between the daytime and nighttime Earth-ionosphere waveguides are considered in this article, where it is shown that reflections are indeed small but some interesting and possibly significant exceptions may occur at highly oblique incidence.
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A study of VLF wave propagation characteristics in the earth-ionosphere waveguide
TL;DR: In this paper, the authors carried out a waveguide mode analysis of 16-kHz very low frequency (VLF) radiowaves in the earth-ionosphere waveguide and found that at heights of less than 70 km, the change in the phase of the VLF waves due to changes in phase velocity is smaller when the ionosphere is sharply bound and assumed to have finite conductivity rather than infinite conductivity.
References
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Book
Electromagnetic Waves in Stratified Media
TL;DR: In this article, the authors provide the theoretical basis for a variety of applications of electromagnetic (radio) waves to communications, navigation, and remote sensing, and this book is based on fundamental research in electromagnetic wave propagation that James R. Wait performed in the Central Radio Propagation Laboratory (CRPL) of NBS from 1956 to 1962.
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Mode conversion and refraction effects in the Earth-ionosphere waveguide for VLF radio waves
TL;DR: In this paper, an approximate theory of multimode propagation in a nonuniform curved terrestrial waveguide is presented, where the starting point is the calculation of the mode conversion in a waveguide with an abrupt change of reflecting height and wall impedance.
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Anomalous Sunrise Effects Observed on a Long Transequatorial VLF Propagation Path
TL;DR: One year's observations of VLF transmissions from NLK received over a long transequatorial path at Smithfield, South Australia, are described in this article, where the occurrence of phase cycle slipping and associated fade spacing anomalies are interpreted as arising from anomalously high mode conversion when the sunrise line is in the vicinity of the geomagnetic equator.
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Frequency dependence of VLF modal interference effects observed on east-west propagation paths
TL;DR: In this article, the modal interference spacing D, in the frequency range 13.6-22.3 kHz, was obtained during sunrise transitions on middle-latitude east-west propagation paths.