Structures Technology For Large Radio And Radar Telescope Systems

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Structures Technology for Large Radio and Radar Telescope Systems

Author : James W. Mar,Harold Liebowitz
Publisher : Mit Press
Page : 550 pages
File Size : 55,8 Mb
Release : 2003-02-01
Category : Technology & Engineering
ISBN : 0262632802

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Structures Technology for Large Radio and Radar Telescope Systems by James W. Mar,Harold Liebowitz Pdf

The national interest in large radio and radar telescope systems spans the entire engineering and scientific community, and there is every indication that the country will embark upon the construction of still more of these systesm in the near future. Radio and radar astronomers now require very large mechanical devices. The system specifications lead to structural criteria which are unique and outside the immediate interest and/or capability of most of the structures community.Radio and radar telescopes and the radomes that may protect them are often enormous structures. Their design presents extremely complicated technological problems. These instruments must operate with precision in varied environments and environmental conditions. Radomes must protect radio and radar antennas without seriously interfering with the incoming information.The Office of Naval Research and MIT cosponsored an international conference in 1967 on the structural problems associated with large radio and radar telescope systems, the proceedings of which are collected here. The papers in this books deal with the problems outlined above from several points of view. The contents of the papers can be grouped roughly as follows:1. Requirements and standards for supporting structures, tracking equipment, antennas, and radomes.2. Design and performance of existing systems.3. Theoretical analysis of the structures of supporting structures, antennas, and radomes. In some cases the analysis is made for a structure under stress. Computer techniques are described for several problems.4. Methods for evaluating actual or predicted performance of various structures. Here again computer techniques are employed.

Structures Technology for Large Radio and Radar Telescope Systems

Author : James W. Mar
Publisher : MIT Press (MA)
Page : 538 pages
File Size : 55,5 Mb
Release : 1969
Category : Technology & Engineering
ISBN : 0262130467

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Structures Technology for Large Radio and Radar Telescope Systems by James W. Mar Pdf

The national interest in large radio and radar telescope systems spans the entire engineering and scientific community, and there is every indication that the country will embark upon the construction of still more of these systesm in the near future. Radio and radar astronomers now require very large mechanical devices. The system specifications lead to structural criteria which are unique and outside the immediate interest and/or capability of most of the structures community. Radio and radar telescopes and the radomes that may protect them are often enormous structures. Their design presents extremely complicated technological problems. These instruments must operate with precision in varied environments and environmental conditions. Radomes must protect radio and radar antennas without seriously interfering with the incoming information. The Office of Naval Research and MIT cosponsored an international conference in 1967 on the structural problems associated with large radio and radar telescope systems, the proceedings of which are collected here. The papers in this books deal with the problems outlined above from several points of view. The contents of the papers can be grouped roughly as follows: 1. Requirements and standards for supporting structures, tracking equipment, antennas, and radomes. 2. Design and performance of existing systems. 3. Theoretical analysis of the structures of supporting structures, antennas, and radomes. In some cases the analysis is made for a structure under stress. Computer techniques are described for several problems. 4. Methods for evaluating actual or predicted performance of various structures. Here again computer techniques are employed.

The Paraboloidal Reflector Antenna in Radio Astronomy and Communication

Author : Jacob W. M. Baars
Publisher : Springer Science & Business Media
Page : 270 pages
File Size : 45,5 Mb
Release : 2007-08-06
Category : Science
ISBN : 9780387697345

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The Paraboloidal Reflector Antenna in Radio Astronomy and Communication by Jacob W. M. Baars Pdf

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.

Thermal Design and Thermal Behaviour of Radio Telescopes and their Enclosures

Author : Albert Greve,Michael Bremer
Publisher : Springer Science & Business Media
Page : 409 pages
File Size : 46,7 Mb
Release : 2010-03-17
Category : Science
ISBN : 9783642038679

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Thermal Design and Thermal Behaviour of Radio Telescopes and their Enclosures by Albert Greve,Michael Bremer Pdf

Radio telescopes as well as communication antennas operate under the influence of gravity, temperature and wind. Among those, temperature influences may degrade the performance of a radio telescope through transient changes of the focus, pointing, path length and sensitivity, often in an unpredictable way. Thermal Design and Thermal Behaviour of Radio Telescopes and their Enclosures reviews the design and construction principles of radio telescopes in view of thermal aspects and heat transfer with the variable thermal environment; it explains supporting thermal model calculations and the application and efficiency of thermal protection and temperature control; it presents many measurements illustrating the thermal behaviour of telescopes in the environment of their observatory sites. The book benefits scientists and radio/communication engineers, telescope designers and construction firms as well as telescope operators, observatory staff, but also the observing astronomer who is directly confronted with the thermal behaviour of a telescope.

An Assessment of Current Capability for Computer Analysis of Shell Structures

Author : Richard F. Hartung
Publisher : Unknown
Page : 246 pages
File Size : 46,8 Mb
Release : 1971
Category : Computer programs
ISBN : UOM:39015095328855

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An Assessment of Current Capability for Computer Analysis of Shell Structures by Richard F. Hartung Pdf

The report contains an assessment of current shell analysis capability. The assessment is based on work conducted at the Lockheed Palo Alto Research Laboratory under contract to the Air Force Flight Dynamics Laboratory. In addition to surveying the open literature, information for the study was gathered during a series of visits made to organizations throughout the United States at which there is an active shell analysis research effort. More than 40 industrial concerns, government agencies and universities have been visited to date. During each visit, technical personnel working in the area of shell analysis were interviewed to determine the scope of their present analysis capability, to learn of current research activities and to discuss computer methods of shell analysis in general. Information so obtained is summarized in a series of briefs which appear in the Appendix of this report.

Integrated Modeling of Telescopes

Author : Torben Andersen,Anita Enmark
Publisher : Springer Science & Business Media
Page : 545 pages
File Size : 51,5 Mb
Release : 2011-06-23
Category : Science
ISBN : 9781461401490

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Integrated Modeling of Telescopes by Torben Andersen,Anita Enmark Pdf

Ground- or space-based telescopes are becoming increasingly more complex and construction budgets are typically in the billion dollar range. Facing costs of this magnitude, availability of engineering tools for prediction of performance and design optimization is imperative. Establishment of simulation models combining different technical disciplines such as Structural Dynamics, Control Engineering, Optics and Thermal Engineering is indispensable. Such models are normally called Integrated Models because they involve many different disciplines. The models will play an increasingly larger role for design of future interdisciplinary optical systems in space or on ground. The book concentrates on integrated modeling of optical and radio telescopes but the techniques presented will be applicable to a large variety of systems. Hence, the book will be of interest to optical and radio telescope designers, designers of spacecrafts that include optical systems, and to designers of various complex defense systems. The book may also find use as a textbook for undergraduate and graduate courses within the field. "Adaptive Optics" is an exciting and relatively new field, originally dedicated to correction for blurring when imaging through the atmosphere. Although this objective is still of high importance, the concept of Adaptive Optics has recently evolved further. Today, the objective is not only to correct for atmospheric turbulence effects but also for a range of static and dynamical telescope aberrations. The notion of adaptive optics has expanded to the field of "Wavefront Control", correcting for a variety of system aberrations. Wavefront control systems maintain form and position of optical elements with high precision under static and dynamical load. In many ways, such systems replace the steel structures of traditional optical systems, thereby providing much lighter systems with a performance not possible before. Integrated Modeling is the foremost tool for studies of Wavefront Control for telescopes and complex optics and is therefore now of high importance. Springer has recently published two books on telescopes, "Reflecting Telescope Optics" by R. Wilson, and "The Design and Construction of Large Optical Telescopes" by P. Bely. Noting that a new (and expensive) generation of Extremely Large Telescopes with apertures in the 30-100 m range is on the way, the present book on integrated modeling is a good match to the existing books and an appropriate specialization and continuation of some subjects dealt with in those books.

Applied Mechanics Reviews

Author : Anonim
Publisher : Unknown
Page : 772 pages
File Size : 41,5 Mb
Release : 1970
Category : Mechanics, Applied
ISBN : UCAL:C2682439

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Applied Mechanics Reviews by Anonim Pdf

NASA Scientific and Technical Reports and Publications for 1969 - A Selected Listing

Author : United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher : Unknown
Page : 956 pages
File Size : 50,9 Mb
Release : 1970
Category : Science
ISBN : NASA:31769000659238

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NASA Scientific and Technical Reports and Publications for 1969 - A Selected Listing by United States. National Aeronautics and Space Administration. Scientific and Technical Information Division Pdf

A Selected Listing of NASA Scientific and Technical Reports

Author : United States. National Aeronautics and Space Administration. Scientific and Technical Information Division
Publisher : Unknown
Page : 962 pages
File Size : 41,7 Mb
Release : 1970
Category : Aeronautics
ISBN : CORNELL:31924057848867

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A Selected Listing of NASA Scientific and Technical Reports by United States. National Aeronautics and Space Administration. Scientific and Technical Information Division Pdf

Proceedings

Author : Anonim
Publisher : Unknown
Page : 1482 pages
File Size : 43,6 Mb
Release : 1968
Category : Matrices
ISBN : UIUC:30112008589175

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Proceedings by Anonim Pdf

Reprints - National Radio Astronomy Observatory, Green Bank, W. Va

Author : National Radio Astronomy Observatory (U.S.)
Publisher : Unknown
Page : 356 pages
File Size : 44,9 Mb
Release : 1974
Category : Astronomy
ISBN : OSU:32435023323942

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Reprints - National Radio Astronomy Observatory, Green Bank, W. Va by National Radio Astronomy Observatory (U.S.) Pdf

Catalog of Copyright Entries. Third Series

Author : Library of Congress. Copyright Office
Publisher : Copyright Office, Library of Congress
Page : 1510 pages
File Size : 42,7 Mb
Release : 1972
Category : Copyright
ISBN : STANFORD:36105006357243

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Catalog of Copyright Entries. Third Series by Library of Congress. Copyright Office Pdf

NBS Special Publication

Author : Anonim
Publisher : Unknown
Page : 534 pages
File Size : 41,6 Mb
Release : 1977
Category : Weights and measures
ISBN : UOM:39015029637298

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NBS Special Publication by Anonim Pdf

MFPG, Engineering Design

Author : Mechanical Failures Prevention Group
Publisher : Unknown
Page : 384 pages
File Size : 46,5 Mb
Release : 1977
Category : Engineering design
ISBN : UCR:31210023556317

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MFPG, Engineering Design by Mechanical Failures Prevention Group Pdf

To See the Unseen

Author : Andrew J. Butrica
Publisher : Unknown
Page : 332 pages
File Size : 43,8 Mb
Release : 1996
Category : Planetary science
ISBN : NASA:31769000641004

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To See the Unseen by Andrew J. Butrica Pdf

A comprehensive & illuminating history of this little-understood, but surprisingly significant scientific activity. Quite rigorous & systematic in its methodology, the book explores the development of the radar astronomy specialty in the larger community of scientists. More than just discussing the development of this field, however, the author uses planetary radar astronomy as a vehicle for understanding larger issues relative to the planning & execution of "big science" by the Fed. government. Sources, interviews, technical essay, abbreviations, & index.