Recovery of diffraction-limited object autocorrelations from astronomical speckle interferograms using the CLEAN algorithm

Details Recovery of diffraction-limited object autocorrelations from astronomical speckle interferograms using the CLEAN algorithm Recovery of diffraction-limited object autocorrelations from astronomical speckle interferograms using the CLEAN algorithm

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj....100..294g&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 100, July 1990, p. 294-306. Research supported by the W. M. Keck Foundation.

Astronomy and Astrophysics

Astronomy

3

Autocorrelation, Diffraction Limited Cameras, Seeing (Astronomy), Speckle Interferometry, Algorithms, Data Reduction, Fourier Transformation, Signal To Noise Ratios, Synthetic Apertures

Scientific paper

A new technique for processing speckle interferometric data is presented, which uses the CLEAN algorithm, originally developed for the removal of the effects of incomplete spatial frequency coverage in aperture synthesis radio maps. Since Labeyrie (1970) first noted that the autocorrelation of a speckle-gram preserves information up to the diffraction limit of an optical telescope, a number of different techniques have been applied to recover this information, usually by Fourier deconvolution of the average power spectrum of the specklegrams with a similar spectrum for a known point source. An alternative is to deconvolve the average autocorrelation of the specklegrams directly, rather than the power spectrum; this is where CLEAN, which has been shown to be a powerful tool in deconvolution problems, may be used. It is found that CLEAN is straightforward to apply, and yields results that exceed the quality of recoveries made using at least one other existing technique. Diffraction-limited and near-diffraction-limited results are presented, using photon-noise-limited specklegrams taken with the Hale 5-m telescope at Palomar under a variety of seeing conditions.

Affiliated with

Also associated with

No associations

Rating

Recovery of diffraction-limited object autocorrelations from astronomical speckle interferograms using the CLEAN algorithm 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 Recovery of diffraction-limited object autocorrelations from astronomical speckle interferograms using the CLEAN algorithm, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Recovery of diffraction-limited object autocorrelations from astronomical speckle interferograms using the CLEAN algorithm will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1091984