Diffraction Limited Imaging With Large And Moderate Telescopes
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Diffraction Limited Imaging With Large And Moderate Telescopes
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Author : Swapan K. Saha
language : en
Publisher: World Scientific
Release Date : 2007
Diffraction Limited Imaging With Large And Moderate Telescopes written by Swapan K. Saha and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Nature categories.
This book deals with the fundamentals of wave optics, polarization, interference, diffraction, imaging, and the origin, properties, and optical effects of turbulence in the Earth's atmosphere. Techniques developed during the last few decades to overcome atmospheric image degradation (including passive methods, speckle interferometry in particular, and active methods such as adaptive optics), are highlighted. Also discussed are high resolution sensors, image processing, and the astronomical results obtained with these techniques.
Diffraction Limited Imaging With Large And Moderate Telescopes
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Author : Swapan K. Saha
language : en
Publisher: World Scientific
Release Date : 2007
Diffraction Limited Imaging With Large And Moderate Telescopes written by Swapan K. Saha and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Science categories.
This book deals with the fundamentals of wave optics, polarization, interference, diffraction, imaging, and the origin, properties, and optical effects of turbulence in the Earth's atmosphere. Techniques developed during the last few decades to overcome atmospheric image degradation (including passive methods, speckle interferometry in particular, and active methods such as adaptive optics), are highlighted. Also discussed are high resolution sensors, image processing, and the astronomical results obtained with these techniques.
Diffraction Limited Imaging With Very Large Telescopes
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Author : D.M. Alloin
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Diffraction Limited Imaging With Very Large Telescopes written by D.M. Alloin and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
A few years ago, a real break-through happened in observational astronomy: the un derstanding of the effect of atmospheric turbulence on the structure of stellar images, and of ways to overcome this dramatic degradation. This opened a route to diffraction-limited observations with large telescopes in the optical domain. Soon, the first applications of this new technique led to some outstanding astrophysical results, both at visible and infrared wavelengths. Yet, the potential of interferometric observations is not fully foreseeable as the first long-baseline arrays of large optical telescopes are being built or cOIIllnissioned right now. In this respect a comparison with the evolution of radio-astronomy is tempting. From a situation where, in spite of the construction of giant antennas, low angular resolution was prevailing, the introduction of long baseline and very long baseline interferometry and the rapid mastering of sophisticated image reconstruction techniques, have brought on a nearly routine basis high dynamic range images with milliarcseconds resolution. This, of course, has completely changed our views of the radio sky.
High Resolution Imaging
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Author : Swapan K. Saha
language : en
Publisher: CRC Press
Release Date : 2015-01-28
High Resolution Imaging written by Swapan K. Saha and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-01-28 with Science categories.
Interferometric observations need snapshots of very high time resolution of the order of (i) frame integration of about 100 Hz or (ii) photon-recording rates of several megahertz (MHz). Detectors play a key role in astronomical observations, and since the explanation of the photoelectric effect by Albert Einstein, the technology has evolved rather
Astronomy And Astrophysics In The New Millenium Panel Reports
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Author : Astronomy and Astrophysics Survey Committee
language : en
Publisher: National Academies Press
Release Date : 2001
Astronomy And Astrophysics In The New Millenium Panel Reports written by Astronomy and Astrophysics Survey Committee and has been published by National Academies Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Magnetic Coupling Between The Interior And Atmosphere Of The Sun
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Author : S.S. Hasan
language : en
Publisher: Springer Science & Business Media
Release Date : 2010-03-10
Magnetic Coupling Between The Interior And Atmosphere Of The Sun written by S.S. Hasan and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010-03-10 with Science categories.
Solar physics in India has a tradition that can be traced to the setting up of the Kodaikanal Observatory in 1899 when the Madras Observatory was relocated to a high altitude site with a view to initiate observations of the sun. This conference on Magnetic Coupling between the Interior and the Atmosphere of the Sun during 2–5 December 2008 was planned to coincide with centenary of the Evershed effect discovery at Kodaikanal in 1909. The aim of this meeting was to bring to a critical focus a comprehensive - derstanding of the important issues pertaining to solar magnetism with particular emphasis on the various MHD processes that operate in the solar atmosphere. The current status of magnetic eld measurements and their implications in the light of recenttheoriesandnumericalmodelingthataddressthe fundamentalscalesandp- cessesinthehighlymagnetizedturbulentplasmawerereviewedduringthismeeting. The meeting was timely for the following reasons: Space observations such as from SOHO and TRACE have provided a wealth of multiwavelength observations onprocessesoccurringinregionsofthe atmosphereextendingfromthe photosphere up to the outer corona. With the launch of Hinode and STEREO in 2006 and of SDO (Solar Dynamics Observatory) shortly, this conference provided a platform for in-depth discussions on new results from various space missions as well as a comparison with ground-based observing facilities such as the Swedish 1-m Solar Telescope. Using sophisticated image processing techniques, such telescopes r- tinelygenerateobservationswitharesolutionbetterthan0. 1arcsec,therebyyielding more informative diagnostics for instance of the microstructure of ux tubes.
The Planet Observer S Handbook
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Author : Fred W. Price
language : en
Publisher: Cambridge University Press
Release Date : 2000-10-26
The Planet Observer S Handbook written by Fred W. Price and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000-10-26 with Nature categories.
This is an informative, up-to-date and well-illustrated guide to planetary observations for amateurs. After a brief description of the solar system and a chapter on the celestial sphere, readers are shown how to choose, test and use a telescope with various accessories and how to make observations and record results. For each planet and the asteroids, details are given of observational techniques, together with suggestions for how to make contributions of scientific value. From a general description and detailed observational history of each planet, observers can anticipate what they should see and assess their own observations. The chapter on planetary photography includes the revolutionary use of videography, charge coupled devices and video-assisted drawing. There are also chapters on making maps and planispheres and on photoelectric photometry.
Introduction To Inverse Problems In Imaging
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Author : M. Bertero
language : en
Publisher: CRC Press
Release Date : 2020-08-30
Introduction To Inverse Problems In Imaging written by M. Bertero and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-08-30 with Technology & Engineering categories.
This is a graduate textbook on the principles of linear inverse problems, methods of their approximate solution, and practical application in imaging. The level of mathematical treatment is kept as low as possible to make the book suitable for a wide range of readers from different backgrounds in science and engineering. Mathematical prerequisites are first courses in analysis, geometry, linear algebra, probability theory, and Fourier analysis. The authors concentrate on presenting easily implementable and fast solution algorithms. With examples and exercises throughout, the book will provide the reader with the appropriate background for a clear understanding of the essence of inverse problems (ill-posedness and its cure) and, consequently, for an intelligent assessment of the rapidly growing literature on these problems.
The Future Of Small Telescopes In The New Millennium
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Author : Terry D. Oswalt
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
The Future Of Small Telescopes In The New Millennium written by Terry D. Oswalt and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
The motivation for these volumes is to provide a vision for the future of small telescopes. While this is an admirable task, ultimately I believe that as happens all the time in science - the prognostications will be overtaken by a rapidly changing scientific reality. As Virginia Trimble points out in chapter 1, the kinds of big questions that face us as astronomers today are rather different than the ones that drove the construction of astronomical facilities through much of the twentieth century. Right now, it appears that small telescopes will not have a lot of influence in answering those questions, though they will of course contribute enormously to the many issues discussed throughout the three volumes. Weare on the verge of opening a whole new parameter space that may revolutionize the way we think of small telescopes and their role in astronomy - the domain of the rapidly variable sky. While the LSST is the most prominent example, it is a long way in the future. Nemiroff & Rafert (chapter 2) consider the value of monitoring large parts of the sky on a continuous basis, using technology similar to a webcam. They have installed their CONCAM2 at four locations, including Kitt Peak. A related project, built and operated by the Harvard graduate student Gaspar Bakos - HAT-l (Hungarian Automated Telescope) - also is in operation at Kitt Peak.
National Optical Astronomy Observatories Newsletter
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Author :
language : en
Publisher:
Release Date : 1991
National Optical Astronomy Observatories Newsletter written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Astronomical observatories categories.