The Paraboloidal Reflector Antenna in Radio Astronomy and Communication PDF Download
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Author: Jacob W. M. Baars
Publisher: Springer Science & Business Media
ISBN: 0387697349
Category : Science
Languages : en
Pages : 270
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Book Description
Radio astronomers have developed techniques of calibration of large reflector antennas with radio astronomical methods, but these have not been comprehensively described. This text aims to fill this gap, taking a practical approach to the characterisation of antennas. All calculations and results in the form of tables and figures have been made with Mathematica by Wolfram Research. The reader can use the procedures for the implementation of his own input data.
Author: Jacob W. M. Baars
Publisher: Springer Science & Business Media
ISBN: 0387697349
Category : Science
Languages : en
Pages : 270
Get Book Here
Book Description
Radio astronomers have developed techniques of calibration of large reflector antennas with radio astronomical methods, but these have not been comprehensively described. This text aims to fill this gap, taking a practical approach to the characterisation of antennas. All calculations and results in the form of tables and figures have been made with Mathematica by Wolfram Research. The reader can use the procedures for the implementation of his own input data.
Author: Jay Pasachoff
Publisher: Cambridge University Press
ISBN: 9780521842624
Category : Science
Languages : en
Pages : 296
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Book Description
Astronomy is taught in schools worldwide, but few schoolteachers have any background in astronomy or astronomy teaching, and available resources may be insufficient or non-existent. This volume highlights the many places for astronomy in the curriculum; relevant education research and 'best practice'; strategies for pre-service and in-service teacher education; the use of the Internet and other technologies; and the role that planetariums, observatories, science centres, and organisations of professional and amateur astronomers can play. The special needs of developing countries, and other under-resourced areas are also highlighted. The book concludes by addressing how the teaching and learning of astronomy can be improved worldwide. This valuable overview is based on papers and posters presented by experts at a Special Session of the International Astronomical Union.
Author: Lars Lindberg Christensen
Publisher: Springer Science & Business Media
ISBN: 0387499601
Category : Science
Languages : en
Pages : 267
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Book Description
This hands-on guide offers practical advice on all aspects of science communication. It features a tightly interwoven fabric of issues: product types, target groups, written communication, visual communication, validation processes, practices of efficient workflow, distribution, promotion, advertising, and much more. Extremely practical, the guide provides the necessary "shortcuts" to produce outreach products of high quality. All concepts are explained with simple terms and illustrative examples while check lists and short "to-the-point" overviews enable rapid progress and quick results. New science communicators as well as seasoned presenters will find this guide both helpful and inspirational.
Author: Karl F. Warnick
Publisher: Cambridge University Press
ISBN: 1108423922
Category : Mathematics
Languages : en
Pages : 471
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Book Description
Discover a modern approach to the analysis, modeling and design of high sensitivity phased arrays. Network theory, numerical methods and computational electromagnetic simulation techniques are uniquely combined to enable full system analysis and design optimization. Beamforming and array signal processing theory are integrated into the treatment from the start. Digital signal processing methods such as polyphase filtering and RFI mitigation are described, along with technologies for real-time hardware implementation. Key concepts from interferometric imaging used in radio telescopes are also considered. A basic development of theory and modeling techniques is accompanied by problem sets that guide readers in developing modeling codes that retain the simplicity of the classical array factor method while incorporating mutual coupling effects and interactions between elements. Combining current research trends with pedagogical material suitable for a first-year graduate course, this is an invaluable resource for students, teachers, researchers, and practicing RF/microwave and antenna design engineers.
Author: Andre HECK
Publisher: Springer Science & Business Media
ISBN: 1402053010
Category : Science
Languages : en
Pages : 592
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Book Description
Astronomy isthemostancientsciencehumanshavepracticedonEarth. Itisascienceofextremesandoflargenumbers:extremesoftime–fromthe big bang to in?nity –, of distances, of temperatures, of density and masses, ofmagnetic?eld,etc.Itisasciencewhichishighlyvisible,notonlybecause stars and planets are accessible in the sky to the multitude, but also - cause the telescopes themselves are easily distinguishable, usually on top of scenic mountains, and also because their cost usually represent a subst- tialproportionofthenation’sbudgetandofthetaxpayerscontributionsto that budget. As such, astronomy cannot pass unnoticed. It touches on the origins of matter, of the Universe where we live, on life and on our destiny. It touches on philosophy as well as on religion. Astronomy is the direct c- tactofhumankindwithitsoriginsandtheimmensityofuniversalnature.It is indeed a science of observation where experimentation is practically - possible and which is ruled by mathematics, physics, chemistry, statistical analysis and modelling, while o?ering the largest number of veri?cations of the most advanced theories of fundamental physics such as general r- st ativity and gravitation. At the beginning of the 21 century astronomy is clearly a multidisciplinary activity touching on all aspects of science. It is therefore logical that in the past and still now, astronomy has attracted the most famous scientists, be they pure observers, mathematicians, physicists, biologists, experimentalists, and even politicians.
Author: Andre Heck
Publisher: Springer Science & Business Media
ISBN: 9781402040559
Category : Science
Languages : en
Pages : 368
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Book Description
When I wasa child, growing up in South America,I often went camping in the wild and hence had direct access to the wondrous Southern sky; the Southern Cross was all mine at the time. Little did I know then that the study of the sky would take such a huge importance in my life, and that in the end astronomy and astrophysics would in many ways become my country and my religion. I have lived in several di?erent countries, and when asked my nationality, I am always very tempted to reply: astronomer. I started as a theorist, and my only dream in my youth was to spend nights thinking and calculating, with paper and pencil, and to have the impression by dawn that I had understood something new. So at the time astronomy was seen or dreamt by me as a solitary endeavour, with periodic encounters with my wise adviser and professors; it is this model that I adopted when doing my PhD work. My generation has lived through many revolutions of all kinds. Those in astronomy, I believe, remain particularly remarkable, and I am a true product of them. Now, I elect to live and work in large organizations, and to share my endeavours with many people. And I relish the series of Andr ́ e Heck on Organizations and Strategies in Astronomy, which help us recover our memories, reconstitute our own story, and read with glee about our neighbouring or far-away colleagues.
Author: Library of Congress
Publisher:
ISBN:
Category : Subject headings, Library of Congress
Languages : en
Pages : 2022
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Book Description
Author:
Publisher: European Space Agency
ISBN:
Category :
Languages : en
Pages : 550
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1040
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Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 374
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Book Description
