Ionospheric Effects Of Solar Flares

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Ionospheric Effects of Solar Flares

Author : Hermine Vloemans
Publisher : Springer Science & Business Media
ISBN 13 : 9401022313
Total Pages : 308 pages
Book Rating : 4.4/5 (1 download)

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Book Synopsis Ionospheric Effects of Solar Flares by : Hermine Vloemans

Download or read book Ionospheric Effects of Solar Flares written by Hermine Vloemans and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudden Ionospheric Disturbances resulting from an interaction of the Solar Flare radiation with the constituents of the upper atmosphere constitute one of the three major aspects of ground level monitoring of solar flares -the other two being optical observations of flares, and the observations of solar bursts in radio wavelengths. SIDs, therefore, form a major part of flare monitoring programme in many observatories. Unlike the other two, however, the ionospheric effects of flares provide one major additional source of interest - the reaction of the ionospheric plasma to an impulsive ionization. The high atmosphere provides a low pressure laboratory without walls in which a host of reactions occur between electrons, ions and neutral particles. The resulting products and their distributions may bear no resemblance to those of the primary neutral constituents or their direct ionization products. The variations with the time of the day, with season and with solar activity that form the bulk of the ionospheric measurements are too slow to allow any insight into the nature of these ionospheric reactions whose lifetimes are often very short. The relaxation time of the ionospheric ionization is only a few minutes or fraction of a minute in the lower ionosphere and in the E-region and is about 30 min to an hour at 300 km. The flares provide a sudden short impulse comparable to these time scales.

Ionospheric Effects of Solar Flares

Author : A. P. Mitra
Publisher :
ISBN 13 :
Total Pages : 316 pages
Book Rating : 4.X/5 (1 download)

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Book Synopsis Ionospheric Effects of Solar Flares by : A. P. Mitra

Download or read book Ionospheric Effects of Solar Flares written by A. P. Mitra and published by . This book was released on 1974 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Ionospheric Effects of Solar Flares

Author : Hermine Vloemans
Publisher : Springer
ISBN 13 : 9789401022330
Total Pages : 305 pages
Book Rating : 4.0/5 (223 download)

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Book Synopsis Ionospheric Effects of Solar Flares by : Hermine Vloemans

Download or read book Ionospheric Effects of Solar Flares written by Hermine Vloemans and published by Springer. This book was released on 2012-01-07 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudden Ionospheric Disturbances resulting from an interaction of the Solar Flare radiation with the constituents of the upper atmosphere constitute one of the three major aspects of ground level monitoring of solar flares -the other two being optical observations of flares, and the observations of solar bursts in radio wavelengths. SIDs, therefore, form a major part of flare monitoring programme in many observatories. Unlike the other two, however, the ionospheric effects of flares provide one major additional source of interest - the reaction of the ionospheric plasma to an impulsive ionization. The high atmosphere provides a low pressure laboratory without walls in which a host of reactions occur between electrons, ions and neutral particles. The resulting products and their distributions may bear no resemblance to those of the primary neutral constituents or their direct ionization products. The variations with the time of the day, with season and with solar activity that form the bulk of the ionospheric measurements are too slow to allow any insight into the nature of these ionospheric reactions whose lifetimes are often very short. The relaxation time of the ionospheric ionization is only a few minutes or fraction of a minute in the lower ionosphere and in the E-region and is about 30 min to an hour at 300 km. The flares provide a sudden short impulse comparable to these time scales.

Studies of Solar Flare Effects and Other Ionospheric Disturbances with a High Frequency Doppler Technique

Author : Vaughan Agy
Publisher :
ISBN 13 :
Total Pages : 164 pages
Book Rating : 4.0/5 ( download)

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Book Synopsis Studies of Solar Flare Effects and Other Ionospheric Disturbances with a High Frequency Doppler Technique by : Vaughan Agy

Download or read book Studies of Solar Flare Effects and Other Ionospheric Disturbances with a High Frequency Doppler Technique written by Vaughan Agy and published by . This book was released on 1965 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents some results of work done with a Doppler technique for studying ionospheric disturbances. The theoretical results include a calculation of the frequency shifts to be expected from ch * anges in the parameters of a parabolic model iono.

Physics of Geomagnetic Phenomena

Author : S. Matsushita
Publisher : Elsevier
ISBN 13 : 1483222519
Total Pages : 644 pages
Book Rating : 4.4/5 (832 download)

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Book Synopsis Physics of Geomagnetic Phenomena by : S. Matsushita

Download or read book Physics of Geomagnetic Phenomena written by S. Matsushita and published by Elsevier. This book was released on 2016-06-03 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: Physics of Geomagnetic phenomena, Volume I covers the significant advances in geomagnetism and the penetrations into the generation of geomagnetic field phenomena. This volume is composed of three chapters. Chapter I deals briefly with the discovery and developments in geomagnetism, followed by discussions on some fundamental topics of the field, including the aurora and geomagnetic storms. This chapter also considers the instruments, geomagnetic stations, and the correlations between geomagnetic indices. Chapter II describes the magnetic properties of minerals and various processes of acquisition of remanent magnetization. This chapter also provides palaeomagnetic data for the direction and intensity of the geomagnetic field in ancient times. Chapter III explores geomagnetic variations caused by solar flares and eclipses. This book will prove useful to physicists, students in upper atmospheric and space topics, and scientists in allied fields with a background in geomagnetism.

The D- and E- Regions

Author : William Swider
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis The D- and E- Regions by : William Swider

Download or read book The D- and E- Regions written by William Swider and published by . This book was released on 1974 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The chemistry of the E-region is fairly well understood and even many of the dynamical complications of this region have been successfully modeled on individual bases. Some of the major remaining problems of this region are discussed, in particular the nitric oxide concentration, a gas affecting the ratio of the two major E-region ions, O2(+) and NO(+). The D-region is much simpler than the E-region from a dynamical point of view but extremely much more complex from a chemical standpoint. Recent results from a study of the D-region under bombardment by solar protons is emphasized.

Ionospheric Perturbations, Solar Flares, and Geomagnetic Storms--correlations Observed by Oblique Long-range High-frequency Probing

Download Ionospheric Perturbations, Solar Flares, and Geomagnetic Storms--correlations Observed by Oblique Long-range High-frequency Probing PDF Online Free

Author : Helen R. Baker
Publisher :
ISBN 13 :
Total Pages : 100 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Ionospheric Perturbations, Solar Flares, and Geomagnetic Storms--correlations Observed by Oblique Long-range High-frequency Probing by : Helen R. Baker

Download or read book Ionospheric Perturbations, Solar Flares, and Geomagnetic Storms--correlations Observed by Oblique Long-range High-frequency Probing written by Helen R. Baker and published by . This book was released on 1964 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

An Investigation of Sudden Frequency Deviations Due to the Immediate Ionospheric Effects of Solar Flares

Author : Richard Frank Donnelly
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (261 download)

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Book Synopsis An Investigation of Sudden Frequency Deviations Due to the Immediate Ionospheric Effects of Solar Flares by : Richard Frank Donnelly

Download or read book An Investigation of Sudden Frequency Deviations Due to the Immediate Ionospheric Effects of Solar Flares written by Richard Frank Donnelly and published by . This book was released on 1967 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The solar-flare radiation and ionospheric processes responsible for a type of ionospheric disturbances, called "sudden frequency deviations" (SFD), are investigated. Models of X-ray flare radiation are constructed from satellite X-ray observations, and corresponding SFD effects are calculated for representative ionospheric and radio-transmission parameters. SFD's and satellite observations are studied in detail for the following flare events: 19:35 U.T., April 19, 1962, the largest SFD observed at Boulder and the largest high-energy X-ray burst observed by OSO I; 20:00 U.T., April 20, 1962, one of the largest flare enhancements of HeII (304 Å) line emission observed by OSO I; and 22:40 U.T., October 22, 1963, observed by the VELA satellites. SFD's are associated with impulsive bursts of ionizing radiation with rise times of several minutes or less; radiation enhancements with longer rise times (tens of minutes) are ineffective in causing SFD's. Some SFD's can be explained by X-ray enhancements in the 4-100 Å Range, but most SFD's also require sizeable enhancements at wavelengths longer than 100 Å. Observed enhancements of HeII (304 Å) are large enough to be important to SFD's provided they are sufficiently impulsive (time resolution of present satellite observations of EUV radiation is inadequate for comparison with SFD's; no HeII (304 Å) observations have been made during an SFD observed at Boulder, Colorado). Lyman [alpha] enhancements and X-ray bursts at less than 0.5 Å do not contribute significantly to SFD's

Ionospheric Space Weather

Author : Timothy Fuller-Rowell
Publisher : John Wiley & Sons
ISBN 13 : 1118929233
Total Pages : 312 pages
Book Rating : 4.1/5 (189 download)

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Book Synopsis Ionospheric Space Weather by : Timothy Fuller-Rowell

Download or read book Ionospheric Space Weather written by Timothy Fuller-Rowell and published by John Wiley & Sons. This book was released on 2016-11-23 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph is the outcome of an American Geophysical Union Chapman Conference on longitude and hemispheric dependence of ionospheric space weather, including the impact of waves propagating from the lower atmosphere. The Chapman Conference was held in Africa as a means of focusing attention on an extensive geographic region where observations are critically needed to address some of the fundamental questions of the physical processes driving the ionosphere locally and globally. The compilation of papers from the conference describes the physics of this system and the mechanisms that control ionospheric space weather in a combination of tutorial-like and focused articles that will be of value to the upper atmosphere scientific community in general and to ongoing global magnetosphere-ionosphere-thermosphere (MIT) modeling efforts in particular. A number of articles from each science theme describe details of the physics behind each phenomenon that help to solve the complexity of the MIT system. Because this volume is an outcome of the research presented at this first space science Chapman Conference held in Africa, it has further provided an opportunity for African scientists to communicate their research results with the international community. In addition, the meeting and this conference volume will greatly enhance the space science education and research interest in the African continent and around the world. Ionospheric Space Weather includes articles from six science themes that were discussed at the Chapman Conference in 2012. These include: Hemispherical dependence of magnetospheric energy injection and the thermosphere-ionosphere response Longitude and hemispheric dependence of storm-enhanced densities (SED) Response of the thermosphere and ionosphere to variability in solar radiation Longitude spatial structure in total electron content and electrodynamics Temporal response to lower-atmosphere disturbances Ionospheric irregularities and scintillation Ionospheric Space Weather: Longitude Dependence and Lower Atmosphere Forcing will be useful to both active researchers and advanced graduate students in the field of physics, geophysics, and engineering, especially those who are keen to acquire a global understanding of ionospheric phenomena, including observational information from all longitude sectors across the globe.

Midlatitude Ionospheric Dynamics and Disturbances

Author : Paul M. Kintner, Jr.
Publisher : John Wiley & Sons
ISBN 13 : 1118671716
Total Pages : 762 pages
Book Rating : 4.1/5 (186 download)

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Book Synopsis Midlatitude Ionospheric Dynamics and Disturbances by : Paul M. Kintner, Jr.

Download or read book Midlatitude Ionospheric Dynamics and Disturbances written by Paul M. Kintner, Jr. and published by John Wiley & Sons. This book was released on 2013-05-03 with total page 762 pages. Available in PDF, EPUB and Kindle. Book excerpt: Published by the American Geophysical Union as part of the Geophysical Monograph Series, Volume 181. Filling the need for a 20-year lag in substantial consideration of the midlatitude ionosphere, this volume focuses on work that takes advantage of GPS and UV imaging from satellites over the past decade, two methods that have profoundly transformed our understanding of this stratum of the atmosphere. Its interdisciplinary content brings together researchers of the solar wind, magnetosphere, ionosphere, thermosphere, polar and equatorial ionospheres, and space weather. Modeling and assimilative imaging of the ionosphere and thermosphere show for the first time the complex and global impact of midlatitude ionospheric storms. The editors invited the leading experts in the following areas to contribute the chapters herein: Characterization of Midlatitude Storms Electric Field Coupling From the Heliosphere and Inner Magnetosphere Thermospheric Control of the Midlatitude Ionosphere Ionospheric Irregularities Experimental Methods and New Techniques These themes were chosen to create a path for understanding the midlatitude ionosphere. They continue to be largely valid and represent a coherent division of the subject matter. They will be critical for understanding space weather during the upcoming solar maximum. This book was inspired by the Chapman Conference of the same name held January 2007.

Solar and Space Physics

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309313953
Total Pages : 37 pages
Book Rating : 4.3/5 (93 download)

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Book Synopsis Solar and Space Physics by : National Research Council

Download or read book Solar and Space Physics written by National Research Council and published by National Academies Press. This book was released on 2014-09-25 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2010, NASA and the National Science Foundation asked the National Research Council to assemble a committee of experts to develop an integrated national strategy that would guide agency investments in solar and space physics for the years 2013-2022. That strategy, the result of nearly 2 years of effort by the survey committee, which worked with more than 100 scientists and engineers on eight supporting study panels, is presented in the 2013 publication, Solar and Space Physics: A Science for a Technological Society. This booklet, designed to be accessible to a broader audience of policymakers and the interested public, summarizes the content of that report.

Ionospheric Effects of Solar Flares

Author : Mervyn Archdall Ellison
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (249 download)

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Book Synopsis Ionospheric Effects of Solar Flares by : Mervyn Archdall Ellison

Download or read book Ionospheric Effects of Solar Flares written by Mervyn Archdall Ellison and published by . This book was released on 1950 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Extreme Events in Geospace

Author : Natalia Buzulukova
Publisher : Elsevier
ISBN 13 : 0128127015
Total Pages : 798 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Extreme Events in Geospace by : Natalia Buzulukova

Download or read book Extreme Events in Geospace written by Natalia Buzulukova and published by Elsevier. This book was released on 2017-12-01 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extreme Events in Geospace: Origins, Predictability, and Consequences helps deepen the understanding, description, and forecasting of the complex and inter-related phenomena of extreme space weather events. Composed of chapters written by representatives from many different institutions and fields of space research, the book offers discussions ranging from definitions and historical knowledge to operational issues and methods of analysis. Given that extremes in ionizing radiation, ionospheric irregularities, and geomagnetically induced currents may have the potential to disrupt our technologies or pose danger to human health, it is increasingly important to synthesize the information available on not only those consequences but also the origins and predictability of such events. Extreme Events in Geospace: Origins, Predictability, and Consequences is a valuable source for providing the latest research for geophysicists and space weather scientists, as well as industries impacted by space weather events, including GNSS satellites and radio communication, power grids, aviation, and human spaceflight. The list of first/second authors includes M. Hapgood, N. Gopalswamy, K.D. Leka, G. Barnes, Yu. Yermolaev, P. Riley, S. Sharma, G. Lakhina, B. Tsurutani, C. Ngwira, A. Pulkkinen, J. Love, P. Bedrosian, N. Buzulukova, M. Sitnov, W. Denig, M. Panasyuk, R. Hajra, D. Ferguson, S. Lai, L. Narici, K. Tobiska, G. Gapirov, A. Mannucci, T. Fuller-Rowell, X. Yue, G. Crowley, R. Redmon, V. Airapetian, D. Boteler, M. MacAlester, S. Worman, D. Neudegg, and M. Ishii. Helps to define extremes in space weather and describes existing methods of analysis Discusses current scientific understanding of these events and outlines future challenges Considers the ways in which space weather may affect daily life Demonstrates deep connections between astrophysics, heliophysics, and space weather applications, including a discussion of extreme space weather events from the past Examines national and space policy issues concerning space weather in Australia, Canada, Japan, the United Kingdom, and the United States

The Sun to the Earth -- and Beyond

Author : National Research Council
Publisher : National Academies Press
ISBN 13 : 0309169194
Total Pages : 196 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis The Sun to the Earth -- and Beyond by : National Research Council

Download or read book The Sun to the Earth -- and Beyond written by National Research Council and published by National Academies Press. This book was released on 2003-07-01 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sun is the source of energy for life on earth and is the strongest modulator of the human physical environment. In fact, the Sun's influence extends throughout the solar system, both through photons, which provide heat, light, and ionization, and through the continuous outflow of a magnetized, supersonic ionized gas known as the solar wind. While the accomplishments of the past decade have answered important questions about the physics of the Sun, the interplanetary medium, and the space environments of Earth and other solar system bodies, they have also highlighted other questions, some of which are long-standing and fundamental. The Sun to the Earthâ€"and Beyond organizes these questions in terms of five challenges that are expected to be the focus of scientific investigations in solar and space physics during the coming decade and beyond.

The High-Latitude Ionosphere and its Effects on Radio Propagation

Author : R. D. Hunsucker
Publisher : Cambridge University Press
ISBN 13 : 1139435000
Total Pages : 639 pages
Book Rating : 4.1/5 (394 download)

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Book Synopsis The High-Latitude Ionosphere and its Effects on Radio Propagation by : R. D. Hunsucker

Download or read book The High-Latitude Ionosphere and its Effects on Radio Propagation written by R. D. Hunsucker and published by Cambridge University Press. This book was released on 2007-09-10 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modern treatment of the physics and phenomena of the ionosphere, beginning with the basics of radio propagation and the use of radio techniques in ionospheric studies. Ample cross-referencing, chapter summaries and reference lists make this book an invaluable aid for graduate students, ionospheric physicists and radio engineers.

Millstone Hill Incoherent Scatter Observations of the Ionospheric Response to the Solar Flare of 7 August 1972

Author : Michael Mendillo
Publisher :
ISBN 13 :
Total Pages : 30 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Millstone Hill Incoherent Scatter Observations of the Ionospheric Response to the Solar Flare of 7 August 1972 by : Michael Mendillo

Download or read book Millstone Hill Incoherent Scatter Observations of the Ionospheric Response to the Solar Flare of 7 August 1972 written by Michael Mendillo and published by . This book was released on 1973 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Millstone Hill incoherent scatter radar was in operation during the important 3B solar flare which occurred at 15:00 UT on 7 August 1972. Measurements of the electron density profile were made over the height range of 125 to 1200 km, together with observations of the electron temperature, ion temperature, and vertical drift velocity above 225 km. The ionospheric Ne(h) profiles obtained span the largest height range ever studied during flares, while the temperature and drift data represent the first measurements of these parameters ever made under flare conditions. In discussing the overall results obtained during this event, estimates are made of the flare-induced electrodynamic and thermal processes which contribute to the observed effects. (Modified author abstract).

Characteristics of the Earth-ionosphere Waveguide for VLF Radio Waves

Author : James R. Wait
Publisher :
ISBN 13 :
Total Pages : 104 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Characteristics of the Earth-ionosphere Waveguide for VLF Radio Waves by : James R. Wait

Download or read book Characteristics of the Earth-ionosphere Waveguide for VLF Radio Waves written by James R. Wait and published by . This book was released on 1964 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).