Download or read book Interferometric Measurement of Brightness Distributions in Discrete Radio Sources written by Alan Theodore Moffet and published by . This book was released on 1961 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Observations of the California Institute of Technology Radio Observatory Owens Valley California 1961 4 Brightness Distribution in Discrete Radio Sources I Observations with an East west Interferometer written by ALAN T. MOFFET and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Caltech variable baseline interferometer was used in a program of brightness distribution measurements on 195 discrete radio sources at a wavelength of 31.3 cm. This paper reports measurements, made with an east-west interferometer baseline, of the complex visibility functions of 127 sources. The amplitude and phase of the visibility functions were measured at transit with antenna spacings of 195, 389, 779, and 1557 lambda. Using these same basic spacings, and by observing at large hour angles, the visibility amplitude was measured at ten other effective spacings between 126 lambda and 1363 lambda. Not all sources were observed at all spacings. The data are presented in tabular form, and graphs of the visibility amplitude as a function of antenna spacing are given for 51 of the more interesting sources. (ALIFORNIA INSTITUTE OF TECHNOLOGY RADIO OBSERVATORY, OWENS VALLEY, CALIFORNIA 1961. 5. BRIGHTNESS DISTRI UTION IN DISCRETE RADIO SOURCES. II. OBSERVATIONS WITH A NORTH-SOUTH INTERFEROMETER, by P. Maltby. 1961, 20p. incl. illus. tables. Unclassifieuthor).

Download or read book Observations of the California Institute of Technology Radio Observatory Owens Valley California 1961 5 Brightness Distribution in Discrete Radio Sources Ii Observations with a North south Interferometer written by P. MALTBY and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The brightness distribution in 165 radio sources was obtained at a wavelength of 31.3 cm. The measurements were made with the variable spacing interferometer at the Owens Valley Radio Observatory using a north-south baseline. Primary sets of observations, giving the visibility amplitude and the phase, were taken at transit at four different antenna spacings. Additional information about the brightness distribution was obtained from observations at large hour angles, using the same physical antenna separations. The results of the observations are given in tabular form and several visibility curves are shown. (Author).

Download or read book Brightness Distribution in Discrete Radio Sources Iii the Structure of the Sources written by P. MALTBY and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The visibility functions of 195 radio sources are interpreted in terms of the structure of these sources. Of the sources, 174 are known or presumed to be extragalactic. Seventy-five of these extragalactic sources are resolved with the interferometer spacings used, and complex structure is found in all but 13. In the sources showing complex structure, two similar components with nearly equal intensities are found in 15, 40 show two or more components of unequal intensities, while 7 appear to be a bright core surrounded by a halo. It is suggested that the majority of all extragalactic sources have complex structure. Data are also given on the brightness distributions in the 21 galactic sources observed. In contrast to the extragalactic sources, emission from the galactic sources is typically confined to a single region. (Author).

Download or read book U S Government Research Reports written by and published by . This book was released on 1962 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Brightness Distribution in Discrete Radio Sources written by Alan T. Moffet and published by . This book was released on 1962 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interferometry and Synthesis in Radio Astronomy written by A. Richard Thompson and published by John Wiley & Sons. This book was released on 2008-11-20 with total page 715 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive, authoritative coverage of interferometric techniques for radio astronomy In this Second Edition of Interferometry and Synthesis in Radio Astronomy, three leading figures in the development of large imaging arrays, including very-long-baseline interferometry (VLBI), describe and explain the technology that provides images of the universe with an angular resolution as fine as 1/20,000 of an arcsecond. This comprehensive volume begins with a historical review followed by detailed coverage of the theory of interferometry and synthesis imaging, analysis of interferometer response, geometrical relationships, polarimetry, antennas, and arrays. Discussion of the receiving system continues with analysis of the response to signals and noise, analog design requirements, and digital signal processing. The authors detail special requirements of VLBI including atomic frequency standards, broadband recording systems, and antennas in orbit. Further major topics include: * Calibration of data and synthesis of images * Image enhancement using nonlinear algorithms * Techniques for astrometry and geodesy * Propagation in the neutral atmosphere and ionized media * Radio interference * Related techniques: intensity interferometry, moon occultations, antenna holography, and optical interferometry Interferometry and Synthesis in Radio Astronomy, Second Edition is comprehensive in that it provides an excellent overview of most radio astronomical instrumentation and techniques.

Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interferometry and Synthesis in Radio Astronomy written by A. Richard Thompson and published by Springer. This book was released on 2017-02-22 with total page 910 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1972 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book The Brightness Distribution in Extragalactic Radio Sources written by A. T. MOFFET and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: Efforts are presented on a continuing program of angular size and brightness distribution measurements. One hundred eighty radio sources were observed with the variable spacing interferometer at the Owens Valley Radio Observatory. Results are presented for a group of 88 sources which were observed with both an east-west and a north-south baseline. All observations were made at a wavelength of 31.3 cm. (Author).

Download or read book Interferometry and Synthesis in Radio Astronomy written by A. Richard Thompson and published by Wiley-Interscience. This book was released on 1986-04-28 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unified description of the theory and practice of radio interferometry and synthesis mapping techniques as they apply to astronomy and geology. Beginning with an historical review, it goes on to provide a detailed description of all aspects of radio inferometry, from basic principles through instrumental design to data reduction. Over 450 original papers and monographs are cited.

Download or read book Interferometric Observations of the Brightness Distribution of Southern Radio Sources written by Ron D. Ekers and published by . This book was released on 1969 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Astrophysics Radio observations edited by M L Meeks written by Nathaniel Carleton and published by Academic Press. This book was released on 1974 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interferometric Observation of the Brightness Distribution of Southern Radio Sources written by R. D. Ekers and published by . This book was released on 1969 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Restoration in the Presence of Errors and Radio Interferometry of Discrete Sources written by Stanford University. Stanford Electronics Laboratories and published by . This book was released on 1957 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book METHODS OF EXPERIMENTAL PHYSICS V 12C written by and published by Academic Press. This book was released on 1976-06-14 with total page 369 pages. Available in PDF, EPUB and Kindle. Book excerpt: METHODS OF EXPERIMENTAL PHYSICS V.12C