Characteristics Of The Earth Ionosphere Waveguide For Vlf Radio Waves

Author : James R. Wait,K. P. Spies
Publisher : Unknown
Page : 104 pages
File Size : 42,7 Mb
Release : 1964
Category : Ionospheric radio wave propagation
ISBN : UIUC:30112105089434

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Characteristics of the Earth-ionosphere Waveguide for VLF Radio Waves by James R. Wait,K. P. Spies Pdf

The principal results of this technical note are graphical presentations of the attenuation rates, phase velocities, and excitation factors for the dominant modes in the earth-ionosphere waveguide.The frequency range considered is 8 kc/s to 30 kc/s. *The model adopted for the ionosphere has an exponential variation for both the electron density and the collision frequency, and the effect of the earth's magnetic field is considered.Comparison with published experimental data confirms that the minimum attenuation of VLF radio waves in daytime is approximtely at 18 kc/s, while at night it is somewhat lower.The directional dependences of propagation predicted by the theory are also confirmed by experimental data.(Author).

Author : James R. Wait,K. P. Spies
Publisher : Unknown
Page : 40 pages
File Size : 40,9 Mb
Release : 1968
Category : Ionospheric radio wave propagation
ISBN : PSU:000072011249

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VLF Mode Calculations for Propagation Across a Land/sea Boundary in the Earth-ionosphere Waveguide by James R. Wait,K. P. Spies Pdf

Using a rather idealized ionospheric model, the conversion of VLF waveguide modes is considered for a discontinuity in the earth's surface properties. The method is based principally on modal analysis, although the connection with an earlier integral equation formulation is demonstrated. Extensive numerical results for the modal parameters and the conversion coefficients are given. Taken together, it is believed that the results may be employed for the quantitative interpretation of observed data and for the prediction of expected fields over rather complicated mixed land/sea paths at VLF.

Author : Kenneth P. Spies
Publisher : Unknown
Page : 108 pages
File Size : 44,7 Mb
Release : 1961
Category : Ionospheric radio wave propagation
ISBN : UIUC:30112106608679

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Mode Calculations for VLF Propagation in the Earth-ionosphere Waveguide by Kenneth P. Spies Pdf

Author : Toshimi Okada,Akira Iwai
Publisher : John Wiley & Sons
Page : 192 pages
File Size : 47,5 Mb
Release : 1988
Category : Science
ISBN : UOM:39015013474773

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Natural VLF Radio Waves by Toshimi Okada,Akira Iwai Pdf

Author : J. Ralph Johler,L. C. Walters,C. M. Lilley,United States. National Bureau of Standards
Publisher : Unknown
Page : 206 pages
File Size : 43,6 Mb
Release : 1958
Category : Ionospheric radio wave propagation
ISBN : UOM:39015086508598

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Transfer Characteristics of Radio Waves Propagated Between the Ionosphere and the Earth at Very Low Frequencies by J. Ralph Johler,L. C. Walters,C. M. Lilley,United States. National Bureau of Standards Pdf

Author : James R. Wait
Publisher : Unknown
Page : 56 pages
File Size : 51,6 Mb
Release : 1960
Category : Radio wave propagation
ISBN : STANFORD:36105131571155

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A Survey and Bibliography of Recent Research in the Propagation of VLF Radio Waves by James R. Wait Pdf

Author : Jules Aarons
Publisher : Unknown
Page : 252 pages
File Size : 42,6 Mb
Release : 1984
Category : Ionosphere
ISBN : UOM:39015095140482

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Ionospheric Radio Wave Propagation by Jules Aarons Pdf

Author : Patrick Steglich
Publisher : BoD – Books on Demand
Page : 194 pages
File Size : 54,9 Mb
Release : 2020-10-21
Category : Science
ISBN : 9781839681882

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Electromagnetic Propagation and Waveguides in Photonics and Microwave Engineering by Patrick Steglich Pdf

Optical and microwave waveguides have attracted much research interest in both science and industry. The number of potential applications for their use is growing rapidly. This book examines recent advances in the broad field of waveguide technology. It covers current progress and latest breakthroughs in emergent applications in photonics and microwave engineering. The book includes ten contributions on recent developments in waveguide technologies including theory, simulation, and fabrication of novel waveguide concepts as well as reviews on recent advances.

Author : Janis Galejs
Publisher : Elsevier
Page : 376 pages
File Size : 42,5 Mb
Release : 2013-10-22
Category : Technology & Engineering
ISBN : 9781483159560

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Terrestrial Propagation of Long Electromagnetic Waves by Janis Galejs Pdf

Terrestrial Propagation of Long Electromagnetic Waves deals with the propagation of long electromagnetic waves confined principally to the shell between the earth and the ionosphere, known as the terrestrial waveguide. The discussion is limited to steady-state solutions in a waveguide that is uniform in the direction of propagation. Wave propagation is characterized almost exclusively by mode theory. The mathematics are developed only for sources at the ground surface or within the waveguide, including artificial sources as well as lightning discharges. This volume is comprised of nine chapters and begins with an introduction to the fundamental concepts of wave propagation in a planar and curved isotropic waveguide. A number of examples are presented to illustrate the effects of an anisotropic ionosphere. The basic equations are summarized and plane-wave reflection from a dielectric interface is considered, along with the superposition of two obliquely incident plane waves. The properties of waveguide boundaries are implicitly represented by Fresnel reflection coefficients. Subsequent chapters focus on boundaries of the terrestrial guide; lightning discharges as a natural source of extremely-low-frequency and very-low-frequency radiation; and the mode theory for waves in an isotropic spherical shell. This book will be a useful resource for students and practitioners of physics.

Author : Wayne I. Klemetti
Publisher : Unknown
Page : 106 pages
File Size : 45,9 Mb
Release : 1988
Category : Ionospheric electron density
ISBN : UOM:39015095142389

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VLF/LF Reflection Properties of the Low Latitude Ionosphere by Wayne I. Klemetti Pdf

Low latitude observations of VLF/LF pulse reflections from the lower ionosphere obtained at nine locations to the east and west of a transmitter in southeastern Brazil are described. The data provide a variety of information on the reflection properties of the ionosphere below about 90 km altitude. Aspects of the data are presented in quasi-dimensional formats useful for identifying ionosphere structure and variability, and detailed analyses of portions of the data provided, which characterize the effective heights of the reflection coefficients of the ionosphere at noon and midnight, over a frequency range from 15 to 65 kHz. Electron density models of the ionosphere, derived from VLF/LF reflection data are also discussed. Keywords: VLF propagation; LF Propagation; Ionosphere reflectivity d region.

Author : Arthur D. Watt
Publisher : Elsevier
Page : 718 pages
File Size : 41,7 Mb
Release : 2013-09-17
Category : Technology & Engineering
ISBN : 9781483152301

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VLF Radio Engineering by Arthur D. Watt Pdf

Electromagnetic Waves, Volume 14: VLF Radio Engineering provides a detailed coverage of the fields involved in very low frequency (VLF) radio engineering. This book serves as a guide for applying the information in the solution of practical problems. Comprised of seven chapters, this volume starts with an overview of the communications aspect following the flow of information carrying energy from the transmitting to receiving locations. This text then presents the complete systems that consider the interrelationship of the various factors. Other chapters explain the basic concept of a VLF antenna, which is a vertical electric monopole over a perfectly conducting flat plane. This book discusses as well the radio wave propagation at VLF, which has been studied theoretically and experimentally for many years. The final chapter deals with the primary components of a complete VLF radio system. This book is a valuable resource for radio engineers, scientists, and researchers.

Author : Anonim
Publisher : Unknown
Page : 456 pages
File Size : 50,5 Mb
Release : 1965
Category : Science
ISBN : CORNELL:31924057184297

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Technical Abstract Bulletin by Anonim Pdf

Author : Anonim
Publisher : Academic Press
Page : 345 pages
File Size : 55,9 Mb
Release : 2014-05-14
Category : Computers
ISBN : 0080576877

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Advances in Electronics and Electron Physics by Anonim Pdf

Advances in Electronics and Electron Physics

Author : John E. Rasmussen
Publisher : Unknown
Page : 78 pages
File Size : 42,8 Mb
Release : 1975
Category : Ionosphere
ISBN : UOM:39015095135284

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Low Frequency Wave-reflection Properties of the Equatorial Ionosphere by John E. Rasmussen Pdf

A joint United States - Brazil experiment was conducted near the geomagnetic equator to confirm the theoretically predicted strong dependence of the ionospheric reflection properties on the azimuthal direction of wave propagation. Skywave delays, reflection coefficients, and polarization ellipses were measured at different frequencies, ranges, and azimuths. The results were compared with full-wave computer calculations for several ionospheric models. A series of high resolution waveforms showing the sunrise transition from night- to daytime conditions is included.

Author : J. R. Johler
Publisher : Unknown
Page : 128 pages
File Size : 55,9 Mb
Release : 2019
Category : Ionosphere
ISBN : OCLC:1132808575

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Transfer Characteristics of Radio Waves Propagated Between the Ionosphere and the Earth at Very Low Frequencies by J. R. Johler Pdf

The transfer characteristics (amplitude and phase as a function of frequency) of the sky wave propagated between the D-region and the E-region of the ionosphere and the earth have been evaluated at low and very low frequencies by the geometrical-optical theory employing the quasi-longitudinal approximation of the ionosphere reflection coefficients. Distances, d/j, up to 1000 statute miles are considered and multiple hops or time-modes (j = 1, 2, 3, ... ) are evaluated for a vertical electric dipole source. The effects of the electron density, collision frequency, intensity of the earth's magnetic field and the geometrical parameters are illustrated. The effect of the vertical lapse of the permittivity of the earth's atmosphere is introduced into the computation.