Aperture synthesis

M. Ryle and A, Hewish (Cambridge) pioneering research in radioastrophysics Ryle for his observations and inventions, in particular of the aperture-synthesis technique, and Hewish for his decisive role in the discovery of pulsars. 

Microwave Imaging Radiometer using Aperture Synthesis... 

Double Fourier Spatio-Spectral Interferometry is the application of a Fourier-transform spectrometer (FTS) to aperture synthesis interferometry. This technique was proposed for the near IR regime by Itoh and Ohtsuka (1986) with a single-pupil interferometry approach, and by Mariotti and Ridgway (1988) with multi-pupil interferometry for high spatial resolution. 

Ohta et al. (2006) theoretically proposed to apply a Martin-Puplett-type Fourier-transform spectrometer to the aperture synthesis system in millimeter and submil-limeter waves. They succeeded in proving that this system is capable of performing broadband imaging observations (Ohta et al. 2007). Also a laboratory prototype spectral-spatial interferometer (Chap. 3) has been constructed to demonstrate the feasibility of the double-Fourier technique at far infrared (FIR) wavelengths (0.15-1 THz) by Grainger et al. (2012). 

J. A. Hogbom, Aperture synthesis with a non-regular distribution of interferometer baselines. Astron. Astrophys. Suppl. 15(1974), 417-426 (1974)... 

Ryle, Sir Martin (1918-84) British radio astronomer, who became professor of radio astronomy at Cambridge University in 1959. He organized three surveys of celestial radio sources and developed the technique of aperture synthesis (seeradio telescope). In 1974 he shared the Nobel Prize tor physics with Antony Hewish (1924- ), who led the team that discovered pulsars. 

Aperture Synthesis Technique to combine the signals of multiple smaller radio telescopes to simulate the characteristics of a much larger instrument. 

Aperture Synthesis. One of the problems of radio telescopes is that radio waves are quite long compared with other forms of electromagnetic radiation. The longer the wavelength, the larger the instrument must be to achieve comparable resolution, which... 

Radio continuum observations are widely used for the interpretation of IR-observations. We therefore limit the review in Sect. II. to recent high frequency single dish observations (II.1) and aperture synthesis (SRT) observations (II.2). IR-observers probably are less familiar with radio recombination line observations and their application to the interpretation of IR-observations. Therefore more space is devoted in Sect. Ill to recent developments in this field. 

In order to increase the angular resolution in radio astronomy the technique of aperture synthesis is used, in which signals from spatially separated antennae are combined, monitoring the correct relative phases. For ex-... 

Discuss radio astronomy paying special attention to telescope resolution, aperture synthesis and microwave lineshapes. 

In the 1980s, with the advent of aperture synthesis radio telescopes, the study of the large-scale structure of magnetic fields in external galaxies has undergone explosive growth. 

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