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.

Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1976 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Introductory Guide to EC Competition Law and Practice written by Valentine Korah and published by . This book was released on 1994 with total page 2354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Energy Research Abstracts written by and published by . This book was released on 1977 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration. Technical Information Center and published by . This book was released on 1977 with total page 1682 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Suppression Effects Associated with VLF Transmitter Signals Injected Into the Magnetosphere written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1977 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetospheric growth of coherent VLF signals transmitted from Siple Station, Antarctica is inhibited by whistler mode echoes of earlier transmitter signals. This new phenomenon, called echo-induced suppression, is observed at least a third of the time that transmissions from Siple Station are detected at the receiving station in Roberval, Quebec, Canada. Suppression levels as high as 20 dB are observed. Though the echo is usually much weaker than the direct signal the level of suppression is directly related to the amplitude of the echo. The echoes reduce triggering of emissions as well as the growth of the signal. Echo-induced suppression is not explained by linear wave-wave interference. The echoes are thought to restrict growth by reducing the coherence of the total input signal. According to quasi-linear theory, wave growth is regulated by changes in the particle pitch angle distribution that results from wave-particle interaction. These new results suggest that coherent waves tend to limit their own growth, even when modification of the particle pitch angle distribution is unimportant. Other phenomena such as whistler-induced suppression of signal growth are thought to be related to echo-induced suppression. Wave-induced growth suppression provides an indirect verification of the existence of discrete ducts for the propagation of VLF signals in the magnetosphere.

Download or read book VLF Wave wave Interaction Experiments in the Magnetosphere written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1978 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1985-04 with total page 1106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Energy Research Abstracts written by and published by . This book was released on 1978 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.

Download or read book Magnetospheric Chorus written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1974 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book R D Abstracts written by Technology Reports Centre (Great Britain) and published by . This book was released on 1976 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book ERDA Energy Research Abstracts written by United States. Energy Research and Development Administration and published by . This book was released on 1977-04 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dissertation Abstracts International written by and published by . This book was released on 1984 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Antarctic Bibliography written by and published by . This book was released on 1984 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book INIS Atomindex written by and published by . This book was released on 1985 with total page 1526 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book OAR Cumulative Index of Research Results written by United States. Air Force. Office of Aerospace Research and published by . This book was released on 1965 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: