Download or read book Spectrum Analysis of VLF Emissions written by Byung Gan Lee and published by . This book was released on 1968 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amplitude analysis of discrete VLF emissions using the Rayspan spectrum analyzer showed characteristics that are not readily detected using the conventional 'frequency' spectrograms. From a small sampling of discrete VLF emissions recorded at various ground stations, the following observations were made: Rise and fall times may be as small as 15 - 20 msec; Emissions that appear 'single' on a frequency spectrogram may consist of closely-linked shorter emissions, each having a duration of the order of 100 msec; Frequency modulation, previously suspected in some frequency spectrograms, is confirmed. In the samples studied the frequency of modulation ranged from 35 Hz to 70 Hz, while the frequency deviation lay mainly in the range 25 Hz to 50 Hz. (Author).

Download or read book Digital Spectra of Artificially Stimulated VLF Emissions written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1974 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: New features of artificially stimulated VLF emissions from the magnetosphere have been discovered by using high resolution digital spectral analysis techniques. Several hundred emissions triggered by three VLF transmitters (NAA, Omega, Siple Station, Antarctica) have been examined. The stimulated emissions initially grow at the frequency of the triggering signal. The emissions always initially rise above the frequency of the triggering signal; this rise is independent of the final slope of the emissions. The emissions characteristically show exponential growth in time with rates that vary from 25 to 250 dB/s. Growth may continue past termination of the triggering signal and appears to be independent of the emission frequency over a range of at least several hundred Hz. The growth also may cease prior to termination. Emission amplitudes may reach 30 dB or more above the level of the triggering signal. Studies of a limited set of the data indicate that lower growth rates are observed when emission activity is just beginning or just ending. These periods are usually characterized by falling rather than rising emissions. These observations are in good agreement with a theory that attributes the emissions to an interaction between the triggering signal and counter-streaming gyroresonant electrons.

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Download or read book Very Low Frequency VLF Phenomena written by A. R. W. Hughes and published by Alpha Science Int'l Ltd.. This book was released on 2003 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contributed articles presented at the Workshop.

Download or read book Handbook of Atmospheric Electrodynamics 1995 written by Hans Volland and published by CRC Press. This book was released on 2017-11-22 with total page 769 pages. Available in PDF, EPUB and Kindle. Book excerpt: The participation of such diverse scientific and technical disciplines as meteorology, astronomy, atmospheric electricity, ionospheric and magnetospheric physics, electromagnetic wave propagation, and radio techniques in the research of atmospherics means that results are published in scientific papers widely spread throughout the literature. This Handbook collects the latest knowledge on atmospherics and presents it in two volumes. Each chapter is written by an expert in his or her field. Topics include the physics of thunderclouds, thunder, global atmospheric electric currents, biological aspects of sferics, and various space techniques for detecting lightning within our own atmosphere as well as in the atmospheres of other planets. Up-to-date applications and methodology are detailed. Volumes I and II offer a comprehensive discussion that together will serve as an important resource for practitioners, professionals, and students alike.

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Download or read book Library of Congress Subject Headings written by Library of Congress. Cataloging Policy and Support Office and published by . This book was released on 2001 with total page 1336 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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Download or read book Natural Electromagnetic Phenomena below 30 kc s written by David Franklin Bleil and published by Springer. This book was released on 2013-11-11 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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