Journal ArticleDOI
Speckle interferometry measurements of atmospheric nonisoplanicity using double stars
TLDR
In this paper, an experimental method was developed which permits estimation of this parameter in the presence of inherently large photon and detector noises as well as unequal double-star component brightnesses.Abstract:
The parameter characterizing nonisoplanatic effects in speckle interferometry can be measured by observing double stars. An experimental method is developed which permits estimation of this parameter in the presence of inherently large photon and detector noises as well as unequal double-star component brightnesses. Data are presented on five double stars ranging from 0.22 to 3.48 arc sec in separation. The results are compared to theory and the implications to both speckle interferometry and compensated imaging are discussed.read more
Citations
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Book ChapterDOI
V The Effects of Atmospheric Turbulence in Optical Astronomy
TL;DR: In this article, the authors discuss the effects of atmospheric turbulence in optical astronomy, summarizes the present state of the theory, reviews the experimental checks that have been made, and discusses the implications in the domain of astronomical observations.
Journal ArticleDOI
Electromagnetic beam propagation in turbulent media: An update
TL;DR: In this article, the authors reviewed the recent developments on wave propagation in turbulent media, including adaptive optics, intensity scintillations, pulse propagation, atmospheric measurements at visible, IR, and millimeter wave frequencies, speckle interferometry, and other related topics.
Journal ArticleDOI
Astronomical speckle imaging
TL;DR: The many methods suggested and (some of them) tried out experimentally and/or observationally for imaging celestial objects through the Earth's atmosphere are reviewed in this paper, where their theoretical and physical bases are examined.
Journal ArticleDOI
On the isoplanatic patch size in stellar speckle interferometry
F Roddier,J M Gilli,J Vernin +2 more
TL;DR: In this paper, it was shown that previously published expressions for the isoplanatic angle do not apply to stellar speckle interferometry and a new expression was derived and found in better agreement with published observations.
References
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Journal ArticleDOI
Optical Resolution Through a Randomly Inhomogeneous Medium for Very Long and Very Short Exposures
TL;DR: In this article, the average resolution of very-long and very-short-exposure images is studied in terms of the phase and log-amplitude structure functions, whose sum is called the wave-structure function.
Journal ArticleDOI
Modulation Transfer Function Associated with Image Transmission through Turbulent Media
Robert E. Hufnagel,N. R. Stanley +1 more
TL;DR: In this article, the optical transfer function corresponding to the time-averaged image-degrading effects of atmospheric turbulence was determined, and quantitative predictions of image degradation were made and shown to agree with observed data.
Journal ArticleDOI
Analysis of a method for obtaining near-diffraction-limited information in the presence of atmospheric turbulence
TL;DR: In this paper, mathematical expressions for the Wiener spectrum of the image of a point source were obtained for angular frequencies much less than, and much greater than, the conventional seeing limit.
Journal ArticleDOI
Isoplanicity: The translation invariance of the atmospheric Green’s function*
D. Korff,G. Dryden,R. P. Leavitt +2 more
TL;DR: In this paper, the isoplanatic condition for imaging through the turbulent atmosphere is investigated, and theoretical expressions for various applications are derived for the Pic du Midi 1 m telescope and the Hale 5 m telescope.
Journal ArticleDOI
Speckle interferometry at finite spectral bandwidths and exposure times
TL;DR: In this article, the effects of wavelength, spectral bandpass, and exposure time on the speckle lens-atmosphere modulation transfer function have been measured using bright stellar sources, and the effect of the exposure time has been analyzed.
Related Papers (5)
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Isoplanicity: The translation invariance of the atmospheric Green’s function*
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