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Ground Wave Propagation In A Normal And An Ionized Atmosphere
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Book Synopsis Ground Wave Propagation in a Normal and an Ionized Atmosphere by : J. Ralph Johler
Download or read book Ground Wave Propagation in a Normal and an Ionized Atmosphere written by J. Ralph Johler and published by . This book was released on 1969 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ground wave propagation in the presence of intense atmospheric ionization, such as may occur as a result of ionizing radiation from nuclear events, is studies. The influence of an enhanced dielectric constant for the atmosphere is also considered. It is concluded that extremely high ionization sources are necessary to produce sufficient ions to completely attenuate the ground wave because of the high ion-neutral collision frequency at the ground level. The analysis method is immediately applicable to the study of ground wave propagation in the ionized atmosphere of a planet of other celestial body, since this requires only the trivial but numerically significant modification of the radius of curvature of the ground. A computer program is presented which can calculate the ground wave in both the normal and the ionized atmosphere. The altitude above ground of either transmitter or receiver or both transmitter and receiver can be taken into account.
Book Synopsis Ground Wave Propagation in a Normal and an Ionized Atmosphere by : J. Ralph Johler
Download or read book Ground Wave Propagation in a Normal and an Ionized Atmosphere written by J. Ralph Johler and published by . This book was released on 1969 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ground wave propagation in the presence of intense atmospheric ionization, such as may occur as a result of ionizing radiation from nuclear events, is studies. The influence of an enhanced dielectric constant for the atmosphere is also considered. It is concluded that extremely high ionization sources are necessary to produce sufficient ions to completely attenuate the ground wave because of the high ion-neutral collision frequency at the ground level. The analysis method is immediately applicable to the study of ground wave propagation in the ionized atmosphere of a planet of other celestial body, since this requires only the trivial but numerically significant modification of the radius of curvature of the ground. A computer program is presented which can calculate the ground wave in both the normal and the ionized atmosphere. The altitude above ground of either transmitter or receiver or both transmitter and receiver can be taken into account.
Book Synopsis Ground Wave Propagation in an Ionized Atmosphere with Arbitrary Variation of the Conductivity with Altitude by : J. Ralph Johler
Download or read book Ground Wave Propagation in an Ionized Atmosphere with Arbitrary Variation of the Conductivity with Altitude written by J. Ralph Johler and published by . This book was released on 1970 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The atmosphere can apparently be ionized to such a degree that the ground wave is disturbed, as a result of, for example, a nuclear event, and ionizing radiation of sufficient intensity to overcome the ion-ion recombination processes may cause the ions to accumulate near the surface of the ground. Gamma radiation from the fallout of a nuclear weapon may produce such ionization for a considerable time after the nuclear event. The problem is similar to that of terrestrial radio wave propagation via the ionosphere, except that in the former case the ionization has a maximum near the surface of the ground and decreases exponentially with altitude. In other words, we have an upside down ionosphere to consider. A new theoretical approach to such ground wave problems based on methods of numerical analysis has been developed for computer application. The computer computation concept is discussed and sample computations based on the fallout model profile are presented. A particular fallout model based on data given in the U.S. Atomic Energy Commission’s handbook on “The Effects of Nuclear Weapons” is considered in some detail, and the effect of an ionization profile (ion number density as a function of altitude) on the propagation of the ground wave is ascertained. A physically possible but not likely extra attenuation of 12 dB at 100 km distance is noted.
Book Synopsis Ground Wave Propagation in an Ionized Atmosphere with Arbitrary Variation of the Conductivity with Altitude by : J. Ralph Johler
Download or read book Ground Wave Propagation in an Ionized Atmosphere with Arbitrary Variation of the Conductivity with Altitude written by J. Ralph Johler and published by . This book was released on 1970 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :United States. Department of Commerce. Office of Telecommunications Publisher : ISBN 13 : Total Pages :75 pages Book Rating :4.:/5 (897 download)
Book Synopsis COMPUTER PROGRAM FOR GROUND WAVE PROPAGATION IN AN IONIZED ATMOSPHERE WITH ARBITRARY VARIATION OF THE CONDUCTIVITY WITH ALTITUDE. by : United States. Department of Commerce. Office of Telecommunications
Download or read book COMPUTER PROGRAM FOR GROUND WAVE PROPAGATION IN AN IONIZED ATMOSPHERE WITH ARBITRARY VARIATION OF THE CONDUCTIVITY WITH ALTITUDE. written by United States. Department of Commerce. Office of Telecommunications and published by . This book was released on 1970 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Radiowave Propagation by : Curt Levis
Download or read book Radiowave Propagation written by Curt Levis and published by John Wiley & Sons. This book was released on 2010-06-01 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: An accessible student-oriented approach to radiowave propagation Propagation-the process whereby a signal is conveyed between transmitter and receiver-has a profound influence on communication systems design. Radiowave Propagation provides an overview of the physical mechanisms that govern electromagnetic wave propagation in the Earth's troposphere and ionosphere. Developed in conjunction with a graduate-level wave propagation course at The Ohio State University, this text offers a balance of physical and empirical models to provide basic physical insight as well as practical methods for system design. Beginning with discussions of propagation media properties, plane waves, and antenna and system concepts, successive chapters consider the most important wave propagation mechanisms for frequencies ranging from LF up to the millimeter wave range, including: Direct line-of-sight propagation through the atmosphere Rain attenuation The basic theory of reflection and refraction at material interfaces and in the Earth's atmosphere Reflection, refraction, and diffraction analysis in microwave link design for a specified terrain profile Empirical path loss models for point-to-point ground links Statistical fading models Standard techniques for prediction of ground wave propagation Ionospheric propagation, with emphasis on the skywave mechanism at MF and HF and on ionospheric perturbations for Earth-space links at VHF and higher frequencies A survey of other propagation mechanisms, including tropospheric scatter, meteor scatter, and propagation effects on GPS systems Radiowave Propagation incorporates fundamental materials to help senior undergraduate and graduate engineering students review and strengthen electromagnetic physics skills as well as the most current empirical methods recommended by the International Telecommunication Union. This book can also serve as a valuable teaching and reference text for engineers working with wireless communication, radar, or remote sensing systems.
Book Synopsis Ionospheric Radio Propagation by : Kenneth Davies
Download or read book Ionospheric Radio Propagation written by Kenneth Davies and published by . This book was released on 1965 with total page 490 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Propagation of Waves written by P. David and published by Elsevier. This book was released on 2013-10-22 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt: Propagation of Waves focuses on the wave propagation around the earth, which is influenced by its curvature, surface irregularities, and by passage through atmospheric layers that may be refracting, absorbing, or ionized. This book begins by outlining the behavior of waves in the various media and at their interfaces, which simplifies the basic phenomena, such as absorption, refraction, reflection, and interference. Applications to the case of the terrestrial sphere are also discussed as a natural generalization. Following the deliberation on the diffraction of the "ground wave around the earth, this text summarizes the role and properties of the troposphere and ionosphere from a general physical point of view. Examples and maps are provided to illustrate the use of the various methods in the determination of ranges or favorable wavelengths. A brief discussion on problems encountered in the field of space communications is also included. This publication is a good source for students and individuals researching on wave propagation, specifically on the principles of radiation and propagation in a homogeneous, isotropy, and lossless dielectric.
Book Synopsis Wave Propagation by : Alexander Schure
Download or read book Wave Propagation written by Alexander Schure and published by . This book was released on 1957 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Amplitude and Phase Curves for Ground-wave Propagation in the Band 200 Cycles Per Second to 500 Kilocycles by : James R. Wait
Download or read book Amplitude and Phase Curves for Ground-wave Propagation in the Band 200 Cycles Per Second to 500 Kilocycles written by James R. Wait and published by . This book was released on 1956 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wave Propagation in the Ionosphere by : K. Rawer
Download or read book Wave Propagation in the Ionosphere written by K. Rawer and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, the author draws on his broad experience to describe both the theory and the applications of wave propagations. The contents are presented in four parts and the sequence of these parts reflect the development of ionospheric and propagational research in areas such as space research geophysics and communications. The first part of the book presents an outline of the theory of electromagnetic waves propagating in a cold electron plasma. For reference, vector analysis, dyadics and eigenvalues introduced in this part are presented in the appendices. Practical aspects of radio wave propagation are the subject of the second part. The typical conditions in different frequency ranges are discussed and the irregular features of the ionospheric structure such as sound and gravity waves are also considered. Warm plasma and the effects of ions are considered in the third part, which includes a discussion of sound-like waves in electron and ion plasmas. Nonlinear effects and instabilities are described in the fourth part.
Book Synopsis Ionospheric Radio by : Kenneth Davies
Download or read book Ionospheric Radio written by Kenneth Davies and published by IET. This book was released on 1990 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1979 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Download or read book ESSA Technical Report ERL-ITS. written by and published by . This book was released on 1969 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis ESSA Technical Report ERL. by : United States. Environmental Science Services Administration
Download or read book ESSA Technical Report ERL. written by United States. Environmental Science Services Administration and published by . This book was released on 1969 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Loran A Groundwave Pulse Propagation by : J. Ralph Johler
Download or read book Loran A Groundwave Pulse Propagation written by J. Ralph Johler and published by . This book was released on 1971 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Publications of the ESSA Research Laboratories by :
Download or read book Scientific and Technical Publications of the ESSA Research Laboratories written by and published by . This book was released on 1966 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:
