On the effect of heavy ions on LF propagation, with special reference to a nuclear environment

Johler, J. R.

doi:10.6028/nbs.tn.313

Cited by 8 publications

(1 citation statement)

References 4 publications

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“…and GaIejs and Mentzoni [1968] have investigated the propagation of ELF and VLF waves below perturbed and unperturbed ionospheres without considering the effects of ions of the lower ionosphere. The work of Crain and Booker [1964], Cole and Pierce [1965], Johler and Berry [1966], and Field [1969] shows that the conductivity of the lower ionosphere is determined principally by ions and that ions will affect the characteristics of radio wave propagation under perturbed conditions and/or for the lower frequencies. In the absence detailed experimental data, it is quite possible to propose computational models that overemphasize the effects of ions; this note will briefly review several of the relevant ionospheric parameters and illustrate their effects on propagation characteristics of ELF and VLF waves under perturbed or unperturbed conditions.…”

Section: Galejsmentioning

confidence: 99%

ELF and VLF Propagation for Models of a Perturbed Ionosphere

Galejs¹

1970

Radio Science

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Calculated parameters of wave propagation illustrate the effects of various choices of ion collision frequencies and molecular weights.Comparisons with atmospheric conductivity measurements tend to justify the use of ion collision frequencies that exceed the collision frequency between neutral particles and of molecular weights that are larger than the molecular weights for the usually assumed atmospheric constituents.

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Section: Galejsmentioning

confidence: 99%

ELF and VLF Propagation for Models of a Perturbed Ionosphere

Galejs¹

1970

Radio Science

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Sky Wave Propagation at Low Frequencies

Johler¹

1999

Wiley Encyclopedia of Electrical and Electronics Engineering

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The sections in this article are Experiments to Detect Low‐Frequency Sky Waves Elementary Theoretical Considerations Theory of Propagation of Low‐Frequency Sky Waves Geometric Series Representation Theory of Reflection from the Ionosphere Sky Wave Diffraction

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Sky Wave Propagation at Low Frequencies

Johler¹

2005

Encyclopedia of RF and Microwave Engineering

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Although LF sky waves have been used since the earliest days of radio science, vigorous study of these waves occurred mainly between 1950 and 1970. This research was in large measure a consequence of the development of precision pulsed ground‐wave radio navigation and positioning systems. Although the ground wave is very stable with time of day, season, and so on, the ionospheric waves vary with time, and if such waves were not somehow sidestepped, the accuracy and precision of the navigation or positioning system would deteriorate. Thus, from an engineering point of view, LF sky waves were a problem in developing navigation systems such as Loran‐C or Loran‐D. One direct consequence of this research was the development of the wave hop theory of LF sky wave propagation, which will be introduced here.

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On the effect of heavy ions on LF propagation, with special reference to a nuclear environment

Cited by 8 publications

References 4 publications

ELF and VLF Propagation for Models of a Perturbed Ionosphere

ELF and VLF Propagation for Models of a Perturbed Ionosphere

Sky Wave Propagation at Low Frequencies

Sky Wave Propagation at Low Frequencies

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