Review of Nonlinear Theory of Ionospheric Modification PDF Download
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Author: Martin V. Goldman
Publisher:
ISBN:
Category : Ionosphere
Languages : en
Pages : 92
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Book Description
Author: Martin V. Goldman
Publisher:
ISBN:
Category : Ionosphere
Languages : en
Pages : 92
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Book Description
Author: Kenneth Davies
Publisher: IET
ISBN: 9780863411861
Category : Science
Languages : en
Pages : 612
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Book Description
This introductory text replaces two earlier publications (Davies 1965, 1969). Among the topics: characteristics of waves and plasma, the solar-terrestrial system, the Appleton formula, radio soundings of the ionosphere, morphology of the ionosphere, oblique propagation, importance of amplitude and phase, earth-space propagation. Annotation copyrighted by Book News, Inc., Portland, OR
Author: Martin V. Goldman
Publisher:
ISBN:
Category :
Languages : en
Pages : 236
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Book Description
Theoretical results are presented for nonlinear plasma wave effects of ionospheric modification by high power radio waves. UHF and L-band scattering models have been constructed and nonlinear deviative absorption computed. The effects of parametric instabilities on the electron distribution function and observed airglow are computed. Linear low frequency electromagnetic plasma instabilities associated with the geomagnetic field are derived. (Author).
Author:
Publisher:
ISBN:
Category : Ionosphere
Languages : en
Pages : 234
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Book Description
Author: C. J. Chilton
Publisher:
ISBN:
Category : Electromagnetic interactions
Languages : en
Pages : 48
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Book Description
Author: International Union of Radio Science. General Assembly
Publisher:
ISBN:
Category :
Languages : en
Pages : 167
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Book Description
Author: Bruce Leonard Cragin
Publisher:
ISBN:
Category : F region
Languages : en
Pages : 260
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Powerful, high-frequency radio waves have been used to temporarily modify the ionosphere. Thermal and parametric interactions have led to a diverse range of observed phenomena, including generation of density striations and artificial spread-F, enhancements of electron plasma waves, production of extrathermal electron fluxes and enhanced airglow, modification of the D-region temperature and densities, wideband signal attenuation, and self-focusing and scattering of the electromagnetic waves. The physics of ionospheric modification by high-power radio waves is reviewed in the context of our current theoretical understanding; disturbance generation mechanisms are qualitatively described. In addition, results of recent experiments are summarized in which ionospheric irregularities are generated and their evolution and decay processes investigated in detail. The effects and potential controlled applications of these HF ionospheric modifications for various RF systems studies are discussed. The C3I scientific community provides an important motivation for these ionospheric modification studies; their increased interaction and active participation in experimental design and interpretation are encouraged.
Author: North Atlantic Treaty Organization. Advisory Group for Aerospace Research and Development. Electromagnetic Wave Propagation Panel. Symposium
Publisher:
ISBN: 9789283505907
Category : Communications, Military
Languages : en
Pages : 490
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Book Description
The propagation medium is, in effect, an integral part of many military systems. For the most part, interest in the propagation medium has been focussed [sic] on identifying and quantifying the limitations it imposes on systems, rather than on ways it might be altered, or controlled. The results of on-going theoretical and experimental research show potential for modifying selected regions of the ionosphere in order to affect radio wave propagation. A variety of modification techniques are being investigated, both ground- and space-based, to increase or decrease existing ionization or to create independent artificial plasmas. These techniques include high power radio waves, lasers, particle beams, and chemical releases. In addition, recent developments in high power RF sources raise concerns over system limitations due to self induced anomalous absorption, ray path deviation and clutter. These proceedings present the current state of ionospheric modification technology, with emphasis on potential applications for enhancing or degrading the performance of military communications, surveillance and navigation systems.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
This report describes experimental and theoretical studies related to ionospheric disturbances produced by rocket exhaust vapors. The purpose of our research was to estimate the ionospheric effects of the rocket launches which will be required to place the Satellite Power System (SPS) in operation. During the past year, we have developed computational tools for numerical simulation of ionospheric changes produced by the injection of rocket exhaust vapors. The theoretical work has dealt with (1) the limitations imposed by condensation phenomena in rocket exhaust; (2) complete modeling of the ionospheric depletion process including neutral gas dynamics, plasma physics, chemistry and thermal processes; and (3) the influence of the modified ionosphere on radio wave propagation. We are also reporting on electron content measurements made during the launch of HEAO-C on Sept. 20, 1979. We conclude by suggesting future experiments and areas for future research.
