Comparison of measurements of the outer scale of turbulence by three different techniques |
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Authors: | Ziad Aziz Schöck Matthias Chanan Gary A Troy Mitchell Dekany Richard Lane Benjamin F Borgnino Julien Martin François |
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Affiliation: | Unité Mixte de Recherche 6525 Astrophysique, Université de Nice-Sophia Antipolis, Parc Valrose, 06108 Nice 2, France. aziz.ZIAD@unice.fr |
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Abstract: | We have made simultaneous and nearly simultaneous measurements of L0, the outer scale of turbulence, at the Palomar Observatory by using three techniques: angle-of-arrival covariance measurements with the Generalized Seeing Monitor (GSM), differential-image-motion measurements with the adaptive-optics system on the Hale 5-m telescope, and fringe speed measurements with the Palomar Testbed Interferometer (PTI). The three techniques give consistent results, an outer scale of approximately 10-20 m, despite the fact that the spatial scales of the three instruments vary from 1 m for the GSM to 100 m for the PTI. |
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