Download or read book Propagation and Observations of VLF Emissions in the Auroral Zone written by R. N. Srivastava and published by . This book was released on 1974 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Propogation and Observations of VLF Emissions in the Auroral Zone written by Rajendra Nath Srivastava and published by . This book was released on 1974 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Observation of VLF Phenomena Inside the Auroral Zone written by Daniel W. Swift and published by . This book was released on 1972 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Download or read book Propagation of VLF Radio Waves Across the Auroral Zone written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1964 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book VLF emissions Observed Near the Auroral Zone written by Leiv Harang and published by . This book was released on 1964 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Study of Auroral VLF Hiss Observed at Syowa Station Antarctica written by Yoshito Tanaka and published by . This book was released on 1976 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Propagation of VLF radio waves across the auroral zone written by E. Ungstrup and published by . This book was released on 1964 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book VLF LF Hiss Emissions Associated with Aurora written by Kazuo Makita and published by . This book was released on 1979 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Atlas of VLF Emission Spectra Observed with the Hiss Recorder written by Jean A. Koch and published by . This book was released on 1964 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bibliography on Auroral Radio Wave Propagation written by Meteorological & geoastrophysical abstracts and published by . This book was released on 1962 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Statistics Concerning the Appearance of Enhanced Vlf emissions on 8 Kc s Observed Near the Auroral Zone Over a Two year Period written by L. Harang and published by . This book was released on 1965 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a two-year period, June 1963 - June 1965, of VLF-emission recordings on 8 kc/s at the Auroral Observatory at Tromso, near the northern auroral zone, is given. The annual curve of appearance of the bursts shows a pronounced variation with a maximum during winter time and a minimum during summer time. In the months November - February VLF-emissions are likely to appear daily for a period of about 1 hour. The diurnal curve shows that the VLF-emissions are limted to appear within the six hours interval 18 - 24 MET. The character of the annual and diurnal curves is explained as due to absorption within the lower part of the ionosphere: the annual absorption effect as due to solar control of the absorption process, the diurnal absorption effect is controlled mainly by the ionospheric absorption due to geomagnetic and auroral disturbances and the after-effects of these. (Author).
Download or read book Auroral Plasma Physics written by Götz Paschmann and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume gives a broad synthesis of the current knowledge and understanding of the plasma physics behind the aurora. The aurora is not only one of the most spectacular natural phenomena on Earth, but the underlying physical processes are expected to be ubiquitous in the plasma universe. Recognizing the enormous progress made over the last decade) through in situ and groundbased measurements as well as theoretical modelling, it seemed timely to write the first comprehensive and integrated book on the subject. Recent advances concern the clarification of the nature of the acceleration process of the electrons that are responsible for the visible aurora, the recognition of the fundamental role of the large-scale current systems in organizing the auroral morphology, and of the interplay between particles and electromagnetic fields.
Download or read book Ground and Space Observations of Medium Frequency Auroral Radio Emissions written by Matthew C. Broughton and published by . This book was released on 2014 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The auroral zone is a rich source of natural radio emissions that can be observed in space and at ground-level. By studying these waves, scientists can gain insight into the plasma processes that generate them and use the near-Earth space environment as a large-scale plasma physics laboratory. This thesis uses both ground-level and in situ observations to study two kinds of natural radio emissions. First, we report observations of a new kind of auroral radio emission. The waves have frequencies ranging from 1.3-2.2 MHz, bandwidths ranging from 90-272 kHz, and durations ranging from 16-355 s. Spectral analysis of the waveform data has revealed that the emission has a complex combination of at least three kinds of fine structures. For model auroral electron distributions, calculations indicate that Langmuir waves could be excited at frequencies consistent with observations. The remainder of the thesis discusses auroral medium frequency (MF) burst, an impulsive, broadband natural radio emission observed at ground-level within a few minutes of local substorm onset. LaBelle (2011) proposed that MF burst originates as Langmuir/Z-mode waves on the topside of the ionosphere that subsequently mode convert to L-mode waves and propagate to ground-level. Using continuous waveform measurements and combined observations with the Sondrestrom Incoherent Scatter Radar, we have performed two tests of this mechanism. The results of these tests are consistent with the mechanism described in LaBelle (2011). A survey of 8,624 half-orbits of the DEMETER spacecraft has revealed 68 observations of bursty MF waves. We have compared the wave properties of these waves to those of MF burst and have found that although it is uncertain, the balance of the evidence suggests that the bursty MF waves observed with DEMETER are the same phenomenon as the ground-level MF burst. Finally, we have used numerical simulations to model both the fine structure of the MF burst and to estimate the attenuation the waves would experience due to Landau damping on the topside ionosphere and mode conversion on the bottomside ionosphere. The amount of Landau damping is sensitive to the ratio of secondary to background electrons [equation]. Ignoring collisional damping in the lower ionosphere, these calculations suggest that for [equation]
Download or read book Journal of Research National Bureau of Standards written by United States. National Bureau of Standards and published by . This book was released on 1964 with total page 1400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Observed Correlations Between Auroral and VLF Emissions written by Stephen R. Mosier and published by . This book was released on 1971 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1974 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Auroral Zone Emissions Centered at 700 Cycles Per Second written by Alv Egeland and published by . This book was released on 1965 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
