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Three Dimensional Estimation Of The Electron Density In The Solar Corona By Tomographic Inversion Of K Coronagraph Measurements
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Book Synopsis Three-dimensional Estimation of the Electron Density in the Solar Corona by Tomographic Inversion of K-coronagraph Measurements by : Mark David Butala
Download or read book Three-dimensional Estimation of the Electron Density in the Solar Corona by Tomographic Inversion of K-coronagraph Measurements written by Mark David Butala and published by . This book was released on 2004 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Improved Three-dimensional Mapping of the Electron Density Distribution of the Solar Corona by : R. Michael Perry
Download or read book Improved Three-dimensional Mapping of the Electron Density Distribution of the Solar Corona written by R. Michael Perry and published by . This book was released on 1972 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Search for Optimal Three-dimensional Mapping of the Solar Corona from K-corona-meter Data by : R. Michael Perry
Download or read book Search for Optimal Three-dimensional Mapping of the Solar Corona from K-corona-meter Data written by R. Michael Perry and published by . This book was released on 1981 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Guide to the Solar Corona by : Donald E. Billings
Download or read book A Guide to the Solar Corona written by Donald E. Billings and published by Academic Press. This book was released on 2013-10-22 with total page 335 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Guide to the Solar Corona is specifically directed to the space scientist or engineer who is not a specialist in solar physics, but whose work requires a fairly detailed knowledge of the corona. It is hoped that the material may prove useful to most graduate students in astrophysics, while solar physicists may find some topics of interest and value to them. The book contains 12 chapters and begins with three descriptive chapters that provide the casual reader with a concept of the corona as it is evident through more or less direct observation. Topics covered include the development of coronal science, observational techniques, and observational aspects of the corona. The next chapter discusses methods of analyzing coronal data. Subsequent chapters present theoretical considerations as they are applicable to the corona. These combine theory with observation to provide a description of the various aspects of the corona. The final chapter is a combination of established ideas and speculation on the place of the corona in the universe.
Book Synopsis Empirical Constraints on O(5+) Outflows and Velocity Distributions in a Solar-Minimum Coronal Streamer by :
Download or read book Empirical Constraints on O(5+) Outflows and Velocity Distributions in a Solar-Minimum Coronal Streamer written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Solar Corona written by Leon Golub and published by Cambridge University Press. This book was released on 2010 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: Second edition graduate level textbook giving an up-to-date treatment of our understanding of the solar corona.
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Physics of the Solar Corona by : C.J. Macris
Download or read book Physics of the Solar Corona written by C.J. Macris and published by Springer. This book was released on 1971-12-31 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the NATO Advanced Institute on Physics of the Solar Corona, held in Cavouri-Vouliagmeni, Athens, Greece, 6-17 September 1970
Book Synopsis The Solar Corona by : John Wainwright Evans
Download or read book The Solar Corona written by John Wainwright Evans and published by . This book was released on 1963 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electrical & Electronics Abstracts by :
Download or read book Electrical & Electronics Abstracts written by and published by . This book was released on 1997 with total page 1860 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spectral Analysis of Three-dimensional Magnetohydrodynamic Models of the Solar Corona by : Pia Zacharias
Download or read book Spectral Analysis of Three-dimensional Magnetohydrodynamic Models of the Solar Corona written by Pia Zacharias and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Automatic Three-dimensional Reconstruction of Coronal Mass Ejection from STEREO A/B White-light Coronagraph Images by : Vladimir Vyacheslavovich Kirnosov
Download or read book Automatic Three-dimensional Reconstruction of Coronal Mass Ejection from STEREO A/B White-light Coronagraph Images written by Vladimir Vyacheslavovich Kirnosov and published by . This book was released on 2016 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solar activity and its effects on terrestrial and near-terrestrial environments have attained major attention in recent times. Ejections of plasma and magnetic field from the solar atmosphere are capable of disturbing interplanetary medium and producing geomagnetic storms on Earth. The main vehicles of these highly energetic events are the Coronal Mass Ejections (CMEs). One of the missions to observe these solar phenomena is a Solar Terrestrial Relations Observatory (STEREO) Ahead/Behind (A/B) mission. STEREO uses two spacecraft with almost identical instrumentation consisting of a series of coronagraphs (COR) and heliospheric imagers (HI). COR and HI images captured by STEREO A/B spacecraft allow for tracking a CME from two different viewpoints and reconstructing its propagation in a three-dimensional (3D) space. Such 3D reconstruction can be accomplished by using a technique of geometrical triangulation. The geometric triangulation technique, however, requires the location of a CME leading edge in each image to be determined first, followed by an estimation of CME propagation parameters. However, there is currently no robust, reliable, and automatic method to derive CME kinematic properties by tracking a CME leading edge continuously in COR and HI images. To our best knowledge, this dissertation is the first systematic approach to address this issue and to develop a fully automatic pipeline for the CME leading edge tracking and estimation of propagation parameters in COR and HI images. The methods proposed in this dissertation are based on algorithms derived from data analysis with further application of image processing and pattern recognition techniques. The proposed methods include 3 individual modules: one unique approach to segment images in a stack (Pre-processing module) and two different novel approaches to track a CME leading edge and estimate propagation parameters in the stack of segmented images (Tracking modules 1 and 2). Pre-processing module allows for effective background removal and CME segmentation. The output of Pre-processing module is a set of running-difference binary images which can be fed into Tracking module 1 (or 2) to track a CME leading edge and to estimate the propagation parameters. The methods were validated using the selected CME events captured in the period from 1 January 2008 to 31 August 2009. The results demonstrate that the proposed pipeline is effective for CME leading edge tracking and CME propagation parameters estimation. Integration of these innovative approaches with the technique of geometric triangulation will provide a necessary tool for automatic estimation of 3D CME properties.
Book Synopsis The Three Dimensional Solar Corona by : Douglas Carl Wilson
Download or read book The Three Dimensional Solar Corona written by Douglas Carl Wilson and published by . This book was released on 1976 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Intensities, Polarization and Electron Density of the Solar Corona from Photographs Taken at the Total Solar Eclipse of 1952 February 25 by : H. von Klüber.
Download or read book Intensities, Polarization and Electron Density of the Solar Corona from Photographs Taken at the Total Solar Eclipse of 1952 February 25 written by H. von Klüber. and published by . This book was released on 1958 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Concerning the Problem on the Electron Density of Solar Corona by : YE YA. BUGOSLAVSKAYA
Download or read book Concerning the Problem on the Electron Density of Solar Corona written by YE YA. BUGOSLAVSKAYA and published by . This book was released on 1960 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phenomena in the Solar Corona by : Caroline Alexander
Download or read book Phenomena in the Solar Corona written by Caroline Alexander and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents a study of multiple phenomena that exist within the solar corona. The structures explored in this work cover a range of sizes from a small-scale X-ray bright point (10 Mm), to medium-scale coronal loops(10-100 Mm), and finally to a large-scale prominence (100 Mm). Observational data and numerical simulations were utilised in order to investigate the structure and evolution of each type of feature. A small-scale X-ray bright point (XBP) was investigated using complete Hinode observations in order to examine it over its entire lifetime (∼12 hours). The XBP was found to be formed directly above an area of cancelling magnetic flux on the photosphere. A good correlation between the rate of X-ray emission and decrease in total magnetic flux was found. The magnetic fragments of the XBP were found to vary on very short timescales (minutes), however the global quasi-bipolar structure remained throughout the lifetime of the XBP. Electron density measurements were obtained using a line ratio of Fe XII and the average density was found to be 5±1x109 cm−3 with the volumetric plasma filling factor calculated to have an average value of 0.04±15%. Emission measure loci plots were then used to infer a steady temperature of log Te [K] ∼ 6.1±0.1. The calculated Fe XII Doppler shifts show velocity changes in and around the bright point of ±15 kms−1 which are observed to change on a timescale of less than 30 minutes. The results indicate that higher cadence spectroscopic measurements are required if the velocity flows are to be related to corresponding changes in the magnetic field. The next feature investigated was a 100 Mm multistranded coronal loop that was simulated in order to investigate how changing the various model parameters would affect the resulting differential emission measure DEM distributions and intensity values. Once the model was fully understood, it was used to test a DEM solver and quantify the 'goodness-of-fit' that could be achieved. This allowed the imitations of the DEM method to be understood. As the model parameter space was altered, a number of changes in the resulting synthetic DEMs were observed. In most cases these changes were subtle and could be explained by the changing physics of the system. The cooling simulation showed the most unique changes where the total energy of the system could be identified by examining the evolution of the intensity values and DEM shape. The iterative solver solution XRT DEM iterative2 did an excellent job of reconstructing the original model intensity values and DEM distributions in the majority of cases. The only instance where the solver did not do well was when the synthetic DEM was very narrow i.e., only covering a few temperature bins. This highlights the under-constrained problem of using DEM solvers and shows that this particular solver works best when the original DEM being reconstructed is smoother and more multithermal. Finally, a large-scale prominence eruption was investigated using observations from two points of view. The structure and evolution of the prominence material and cavity were examined over the eruption process. Many possible initiation methods were investigated to see if the cause of the prominence eruption could be pinned down. It was found that the polar-crown cavity could be defined as a density depletion sitting above denser polar-crown filament plasma which has drained down from the cavity due to gravity. The eruption of the polar crown cavity as a solid body can be decomposed into two phases: a slow rise at a speed of 2 ±0.2 km s−1 , and an acceleration phase at a mean speed of 15-25 ±0.6 km s−1 . The initiation of the prominence was concluded to be caused by a combination of mass un-loading and a type of kink instability.
Book Synopsis Radiometric Measurements of the F and K Solar Corona by : Daniel Lloyd Ellsworth
Download or read book Radiometric Measurements of the F and K Solar Corona written by Daniel Lloyd Ellsworth and published by . This book was released on 1973 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: