Radio Frequency Heating the Ionosphere PDF Download
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Author: George J. Morales
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
A survey of recent developments in the modification of the earth's ionosphere by powerful radio waves is presented from a general perspective of RF heating of plasmas.
Author: George J. Morales
Publisher:
ISBN:
Category :
Languages : en
Pages : 8
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Book Description
A survey of recent developments in the modification of the earth's ionosphere by powerful radio waves is presented from a general perspective of RF heating of plasmas.
Author: R. M. Bloom
Publisher:
ISBN:
Category :
Languages : en
Pages : 46
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Book Description
This volume presents numerical calculations of ionospheric electron density perturbations and ground-level signal changes for several electric field distributions produced by high-frequency (HF) transmitters. This volume applies theory developed in earlier work (Vol. 1) to the problem of possible self-effects of powerful obliquely incident radio waves. Using the results from this earlier work, we use field-driven changes in ionospheric electron density to calculate modified ambient refractive index profiles and the consequent effects on ground signal intensity for sample transmitters. Our calculations indicate that ground-level field-intensity changes of several dB might be produced by joule-heating of the ionosphere by intense oblique HF waves. Our results are extremely sensitive to the model ionosphere and therefore indicate that an experiment should employ the widest possible range of frequencies and propagation conditions. (RH).
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: William E. Gordon
Publisher:
ISBN:
Category :
Languages : en
Pages : 107
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Book Description
Enhancements of various features of the incoherent scatter spectrum are observed when the ionosphere is illuminated with powerful, high-frequency radio waves. The radio waves excite plasma instabilities producing lines or more complex spectral features near the local plasma frequency, at the local ion-acoustic frequency, near the local gyrofrequency and twice the gyrofrequency. The enhancements occur in a thin slab as observed by the incoherent scatter radar and at both upshifted and downshifted frequencies with respect to the probing radar frequency. The enhancements are observed to vary with time when the high frequency transmitter that produces the radio wave excitation is held at constant power, and to vary with time as the high frequency transmitter is turned on or off. (Modified author abstract).
Author: Nathan Blaunstein
Publisher: CRC Press
ISBN: 1420055178
Category : Computers
Languages : en
Pages : 600
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Book Description
A Complete Reference for the 21st Century Until recently, much of the communications technology in the former Eastern bloc countries was largely unknown. Due to the historically competitive nature of East/West relations, scientific groups operated independently, without the benefit of open communication on theoretical framework
Author: K. G. Budden
Publisher: Cambridge University Press
ISBN: 9780521369527
Category : Science
Languages : en
Pages : 694
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Book Description
This book is concerned with the ionosphere and the magnetosphere, and the theory of their effect on radio waves. It includes accounts of some mathematical topics now widely used in this study, particularly W. K. B. approximations, Airy integral functions and integration by steepest descents. The subject is divided into ray theory and full wave theory. Ray theory is useful for high frequencies when the ionosphere is treated as a horizonally stratified medium. The discussion of the magnetosphere, whose structure is more complicated, includes an account of whistlers and ion cyclotron whistlers. The book has been planned both for final year undergraduates and as a reference book for research. It is suitable as a course book on radio propagation for students of physics or electrical engineering or mathematics. Some of the topics are presented from an elementary viewpoint so as to help undergraduates new to the subject. The later parts are more advanced. Because the subject is so large and has seen many important recent advances, some topics have had to be treated briefly, but there is a full bibliography with about 600 references.
Author: T. R. Robinson
Publisher:
ISBN:
Category :
Languages : en
Pages : 129
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Book Description
Author: Kenneth Davies
Publisher:
ISBN:
Category : Ionospheric radio wave propagation
Languages : en
Pages : 490
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Book Description
Author: Yann-Henri Chemin
Publisher: BoD – Books on Demand
ISBN: 1837695385
Category : Science
Languages : en
Pages : 180
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Book Description
The ionosphere is a layer of the Earth's atmosphere that extends from about 50 km to 1000 km above the Earth's surface. It is ionized by solar radiation, which creates ions and free electrons in the upper atmosphere. These ions and electrons reflect radio waves back to the Earth's surface, allowing long-distance radio communication as well as absorption of harmful solar radiation. Ionospheric conductivity monitoring assesses the state of the ionosphere and improves the accuracy of satellite communications. This book is organized into two sections on the influence and impact of transient or orbiting humanmade objects into the ionosphere and the monitoring and modeling of the temporal evolution of the ionosphere. The information presented will lead to a better understanding and forecasting of the ionosphere’s dynamic.
Author: A Gurevich
Publisher: Routledge
ISBN: 1351424378
Category : Science
Languages : en
Pages : 208
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Book Description
A comprehensive and unique account of the creation of artificially ionized layers in the middle and upper atmosphere, using powerful radio waves. Major physical mechanisms associated with the formation of the ionized region are studied in detail. The main part of the author's research is devoted to problems associated with the breakdown mechanisms for radio frequency discharges in air. A special chapter deals with breakdown in intersecting pulsed beams and the effects of recombination, diffusion and atmospheric winds on the stability of the structure. The kinetics of the plasma produced are also described. The authors examine possibilities of inducing changes in the chemical composition of the upper atmosphere by means of radio frequence heating, with promising effects on the concentration of constituents such as ozone. The feasibility of using this phenomenon for; ozone healing - in connection with the ozone holes in the polar regions is investigated. The text is a timely treatment of key topics in the field of ionospheric modification.
