Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994exa.....5..247z&link_type=abstract
Experimental Astronomy, Volume 5, Issue 3-4, pp. 247-268
Astronomy and Astrophysics
Astronomy
2
High Angular Resolution, Interferometry, Atmospheric Turbulence, Outer Scale, Allowable Spectral Bandwidth
Scientific paper
In the case of high angular resolution techniques (speckle interferometry, long baseline Michelson interferometry), one has studied how varies the signal-to-noise ratio (SNR) in terms of the spectral bandwidth Δλ. For values of Δλ varying from 0 up to 100 nanometers, it is shown that the SNR, contrary to the predictions, has no maximum value. In addition, in the case of the high frequency approximation, the effects of a finite spatial-coherence outer scale, the influence of the turbulence model used and of the “optical energy” of the turbulence on the optimal spectral bandwidth have been analyzed and discussed.
Agabi Abdelkrim
Borgnino Julien
Martin Francisco
Ziad Aziz
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