Interferometry and Synthesis in Radio Astronomy

Author: A. Richard Thompson,James M. Moran,George W. Swenson Jr.

Publisher: Springer

ISBN: 331944431X

Category: Science

Page: 872

View: 2875

DOWNLOAD NOW »

This book is open access under a CC BY-NC 4.0 license. The third edition of this indispensable book in radio interferometry provides extensive updates to the second edition, including results and technical advances from the past decade; discussion of arrays that now span the full range of the radio part of the electromagnetic spectrum observable from the ground, 10 MHz to 1 THz; an analysis of factors that affect array speed; and an expanded discussion of digital signal-processing techniques and of scintillation phenomena and the effects of atmospheric water vapor on image distortion, among many other topics. With its comprehensiveness and detailed exposition of all aspects of the theory and practice of radio interferometry and synthesis imaging, this book has established itself as a standard reference in the field. It begins with an overview of the basic principles of radio astronomy, a short history of the development of radio interferometry, and an elementary discussion of the operation of an interferometer. From this foundation, it delves into the underlying relationships of interferometry, sets forth the coordinate systems and parameters to describe synthesis imaging, and examines configurations of antennas for multielement synthesis arrays. Various aspects of the design and response of receiving systems are discussed, as well as the special requirements of very-long-baseline interferometry (VLBI), image reconstruction, and recent developments in image enhancement techniques and astrometric observations. Also discussed are propagation effects in the media between the source and the observer, and radio interference, factors that limit performance. Related techniques are introduced, including intensity interferometry, optical interferometry, lunar occultations, tracking of satellites in Earth orbit, interferometry for remote Earth sensing, and holographic measurements of antenna surfaces. This book will benefit anyone who is interested in radio interferometry techniques for astronomy, astrometry, geodesy, or electrical engineering.
Release

Tools of Radio Astronomy

Problems and Solutions

Author: Thomas Wilson,Susanne Hüttemeister

Publisher: Springer Science & Business Media

ISBN: 9783540668022

Category: Science

Page: 162

View: 1122

DOWNLOAD NOW »

Covering topics of radio astronomy, this book contains graduate-level problems with carefully presented solutions. The problems are arranged following the content of the book "Tools of Radio Astronomy" by Rohlfs and Wilson (also available in this series) on a chapter-by-chapter basis. Some of these problems have been formulated to provide an extension to the material presented in "Tools of Radio Astronomy".
Release

Tools of Radio Astronomy

Author: T. L. Wilson,Kristen Rohlfs,Susanne Hüttemeister

Publisher: Springer Science & Business Media

ISBN: 3540851224

Category: Science

Page: 518

View: 3029

DOWNLOAD NOW »

Four signi?cant factors have led us to update this text. The ?rst is the breathtaking progress in technology, especially in receiver and digital techniques. The second is the advance of radio astronomy to shorter wavelengths, and the increased availab- ity of astronomical satellites. The third is a need to reorganize some of the chapters in order to separate the basic theory, that seldom changes, from practical aspects that change often. Finally, it is our desire to enhance the text by including problem sets for each chapter. In view of this ambitious plan, we have expanded the number of authors. In the reorganization of this edition, we have divided Chap. 4 of the 4th edition into two Chaps. 4 and 5. The ?rst remains Chap. 4, with a slightly different - tle, Signal Processing and Receivers: Theory. This was expanded to include digital processing and components including samplers and digitizers. In Chap. 5, Prac- cal Receiver Systems. we have relegated the presentations of maser and parametric ampli?er front ends, which are no longer commonly used as microwave receivers in radio astronomy, to a short section on “historical developments” and We have retained and improved the presentations of current state-of-the-art devices, cooled transistor and superconducting front ends. We have also included descriptions of local oscillators and phase lock loops. Chapters 5 and 6 in the 4th edition has now become Chap. 6, Fundamentals of Antenna Theory and Chap.
Release

Tools of Radio Astronomy - Problems and Solutions

Author: T.L. Wilson,Susanne Hüttemeister

Publisher: Springer

ISBN: 3319908200

Category: Science

Page: 164

View: 3774

DOWNLOAD NOW »

Covering topics of radio astronomy, this book contains graduate-level problems with carefully presented solutions. The problems are arranged following the content of the book "Tools of Radio Astronomy" by Rohlfs and Wilson (also available in this series) on a chapter-by-chapter basis. Some of these problems have been formulated to provide an extension to the material presented in "Tools of Radio Astronomy".
Release

Tools of Radio Astronomy

Author: Thomas L. Wilson,Kristen Rohlfs,Susanne Hüttemeister

Publisher: Springer Science & Business Media

ISBN: 3642399509

Category: Science

Page: 609

View: 424

DOWNLOAD NOW »

This 6th edition of “Tools of Radio Astronomy”, the most used introductory text in radio astronomy, has been revised to reflect the current state of this important branch of astronomy. This includes the use of satellites, low radio frequencies, the millimeter/sub-mm universe, the Cosmic Microwave Background and the increased importance of mm/sub-mm dust emission. Several derivations and presentations of technical aspects of radio astronomy and receivers, such as receiver noise, the Hertz dipole and beam forming have been updated, expanded, re-worked or complemented by alternative derivations. These reflect advances in technology. The wider bandwidths of the Jansky-VLA and long wave arrays such as LOFAR and mm/sub-mm arrays such as ALMA required an expansion of the discussion of interferometers and aperture synthesis. Developments in data reduction algorithms have been included. As a result of the large amount of data collected in the past 20 years, the discussion of solar system radio astronomy, dust emission, and radio supernovae has been revisited. The chapters on spectral line emission have been updated to cover measurements of the neutral hydrogen radiation from the early universe as well as measurements with new facilities. Similarly the discussion of molecules in interstellar space has been expanded to include the molecular and dust emission from protostars and very cold regions. Several worked examples have been added in the areas of fundamental physics, such as pulsars. Both students and practicing astronomers will appreciate this new up-to-date edition of Tools of Radio Astronomy.
Release

Aperture Synthesis

Methods and Applications to Optical Astronomy

Author: Swapan Kumar Saha

Publisher: Springer Science & Business Media

ISBN: 9781441957108

Category: Science

Page: 466

View: 5424

DOWNLOAD NOW »

This book deals with the fundamentals of stellar interferometry with emphasis on aperture synthesis using sparse array of telescopes particularly at optical/IR wavelengths, the origin, properties, and optical effects of turbulence in the Earth's atmosphere, techniques developed to overcome image degradation. Studded with more than one hundred and fifty illustrations and tens of footnotes, it addresses the basic tricks of trade, current trend, motivation, methods, and path to future promise of true interferometry both from the ground and space. Also discussed are the technical challenge involved, such as beam transportation and recombination, detecting fringes using modern sensors, and image synthesis. Astronomical science that benefits from aperture synthesis imaging are highlighted as well.
Release

The Paraboloidal Reflector Antenna in Radio Astronomy and Communication

Theory and Practice

Author: Jacob W. M. Baars

Publisher: Springer Science & Business Media

ISBN: 0387697349

Category: Science

Page: 253

View: 6246

DOWNLOAD NOW »

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.
Release

An Introduction to Radio Astronomy

Author: Bernard F. Burke,Francis Graham-Smith

Publisher: Cambridge University Press

ISBN: 052187808X

Category: Science

Page: 444

View: 8454

DOWNLOAD NOW »

This well-established, graduate-level textbook is a thorough introduction to radio telescopes and techniques for students and researchers new to the subject.
Release

The Westerbork Observatory, Continuing Adventure in Radio Astronomy

Author: Ernst Raimond,René Genee

Publisher: Springer Science & Business Media

ISBN: 9780792341505

Category: Science

Page: 266

View: 4950

DOWNLOAD NOW »

A small country builds a world-class telescope in its backyard and lives happily ever after (or at least for a quarter century). That in a nutshell is the story told in this collection of essays. The country of course is the Netherlands, and the telescope is the Westerbork Synthesis Radio Tele scope (WSRT), brainchild of Jan Oort. Living happily in this context is a continuing record of discovery and as such also a continuing basis for se curing observing time on facilities in other countries and operating at other frequencies. As our community celebrates the Silver Anniversary of the radio tele scope at Westerbork, it is fitting that we pause to take account of the scientific discoveries and insights it made possible. Initially the instrument represented the very significant step away from university-run, specialist facilities to a well-supported, common-user radio imager also having spec tral and polarization capabilities. It pioneered the mode of operation now common for satellite observatories, in which data is taken and calibrated by technicians and provided to researchers ready for analysis. It has been a major source of discovery in, among other areas, research on neutral hy drogen and studies of dark matter in galaxies.
Release

Library and Information Services in Astronomy III

Proceedings of a Conference Held in Puerto de la Cruz, Tenerife, Spain 21-24 April 1998

Author: Uta Grothkopf,Heinz Andernach,Sarah Stevens-Rayburn,Monique Gómez

Publisher: Astronomical Society of the Pacific

ISBN: N.A

Category: Language Arts & Disciplines

Page: 323

View: 2221

DOWNLOAD NOW »

Release