Very Low Frequency (VLF) Phenomena - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Very Low Frequency (VLF) Phenomena write by A. R. W. Hughes. This book was released on 2003. Very Low Frequency (VLF) Phenomena available in PDF, EPUB and Kindle. Contributed articles presented at the Workshop.
Observation of VLF Phenomena Inside the Auroral Zone
Observation of VLF Phenomena Inside the Auroral Zone - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Observation of VLF Phenomena Inside the Auroral Zone write by Daniel W. Swift. This book was released on 1972. Observation of VLF Phenomena Inside the Auroral Zone available in PDF, EPUB and Kindle. The report presents the results of a three-year program of observations and analysis of very low frequency (VLF) radio emissions in the auroral zone. The particular VLF emissions which are the subject of the study are VLF hiss, VLF chorus and extra low frequency (ELF) hiss. All of these emissions occur in the audio frequency range, and the nomenclature of these various emissions is derived from the sounds generated when the undetected signal is fed into a loudspeaker. (Author).
Whistlers and Related Ionospheric Phenomena
Whistlers and Related Ionospheric Phenomena - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Whistlers and Related Ionospheric Phenomena write by Robert A. Helliwell. This book was released on 2014-06-10. Whistlers and Related Ionospheric Phenomena available in PDF, EPUB and Kindle. The investigation of whistlers and related phenomena is a key element in studies of very-low-frequency propagation, satellite communication, the outer ionosphere, and solar-terrestrial relationships. This comprehensive text presents a history of the study of the phenomena and includes all the elements necessary for the calculation of the characteristics of whistlers and whistler-mode signals. An introduction and brief history are followed by a summary of the theory of whistlers and a detailed explanation of the calculation of their characteristics. Succeeding chapters offer a complete atlas of a variety of whistlers, including those observed in satellites and those generated by nuclear explosions; the results of satellite observation of whistler-mode propagation; the method of reducing whistler data and obtaining electron density information; a full atlas of the various kinds of emissions; and an outline and comparison of the theories of generation of emissions.
VLF and ELF Propagation During Sudden Ionospheric Disturbances
VLF and ELF Propagation During Sudden Ionospheric Disturbances - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook VLF and ELF Propagation During Sudden Ionospheric Disturbances write by E. C. Field. This book was released on 1969. VLF and ELF Propagation During Sudden Ionospheric Disturbances available in PDF, EPUB and Kindle. The study presents the results of a theoretical analysis of the propagation of electromagnetic waves in the very-low-frequency (VLF) and extremely-low-frequency (ELF) ranges in the earth-ionosphere cavity during solar flares. The calculations, which are based upon nominal models of ambient conditions and solar-flare x-ray fluxes and spectra, result in mode-attenuation coefficients which are in good general agreement with observations. The propagation is enhanced relative to ambient conditions at ELF and upper VLF frequencies but is degraded in the lower VLF range. This general behavior is quite insensitive to the details of the assumed x-ray spectrum, the main requirement being a sufficient concentration of x-ray energy in the 1 - 8 A wavelength band. This class of spectrum tends to cause a moderate lowering of the D-region accompanied by an increase in the height gradient of conductivity in the reflection region; this in turn causes the observed phenomena at ELF and VLF during sudden ionospheric disturbances. (Author).
ELF-VLF Radio Wave Propagation
ELF-VLF Radio Wave Propagation - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook ELF-VLF Radio Wave Propagation write by J.A. Holtet. This book was released on 2012-12-06. ELF-VLF Radio Wave Propagation available in PDF, EPUB and Kindle. This volume is based on lectures and discussions presented at a NATO Advanced Study Institute on ELF and VLF Radio Wave Propagation, which was held in Norway April 1974. The study of propagation of electromagnetic waves with frequen cies below 100 kHz has long traditions in ionospheric physics. To-day, this frequency range is still of great importance, both to the physicist, who uses the waves as diagnostic tools to study the earth's environment and to the engineer who exploits the characteris tics of these waves to improve communications, navigation and timing systems. In recent years the active interest in the field has led to very rapid progress in the development of propagation theory as well as in the application of this theory to the solution of practical problems. The intention of the Organizing Committee for this Conference was to bring together theoreticians and experi mentalists working on the various aspects of wave propagation, in order to stimulate a fruitful discussion and exchange of ideas.
