Radio and optical interferometric imaging

Details Radio and optical interferometric imaging Radio and optical interferometric imaging

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992nascp3066....7c&link_type=abstract

In New Mexico Univ., A Lunar Optical-Ultraviolet-Infrared Synthesis Array (LOUISA) p 7-17 (SEE N93-13579 03-89)

Astronomy and Astrophysics

Astronomy

Angular Resolution, Apertures, Coherence, Imaging Techniques, Michelson Interferometers, Synthetic Apertures, High Resolution, Infrared Imagery, Magnetic Resonance, Phase Error, Radio Astronomy

Scientific paper

Since diffraction-limited imaging with a single aperture yields angular resolution approx. lambda/D, the attainment of high angular resolution with single apertures requires the construction of correspondingly large monolithic apertures, the whole surface of which must be figured to much less than a wavelength. At the longer wavelengths, it is impossible to build a sufficiently large single aperture: for example, at lambda 21 cm, arcsec resolution requires an aperture of diameter approx. 50 km. At the shorter wavelengths, the atmosphere imposes a natural limit in resolution of about one arcsec. However, another route is possible; that is, using synthetic apertures to image the sky. Synthetic apertures are now in use in many fields, e.g., radio interferometry, radar imaging, and magnetic-resonance imaging. Radio-interferometric techniques developed in radio astronomy over the past 40 years are now being applied to optical and IR astronomical imaging by a number of groups. Furthermore, the problem of figuring synthetic apertures is considerably simpler, and can be implemented in a computer: new 'self-calibration' techniques allow imaging even in the presence of phase errors due to the atmosphere.

Affiliated with

Also associated with

No associations

Rating

Radio and optical interferometric imaging does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Radio and optical interferometric imaging, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Radio and optical interferometric imaging will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1554910