title: Comparison of measurements of the outer scale of turbulence by three different techniques.
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.
authors.affiliation: Unité Mixte de Recherche 6525 Astrophysique, Université de Nice-Sophia Antipolis, Parc Valrose, 06108 Nice 2, France. aziz.ZIAD@unice.fr
authors.forename: Aziz
authors.initials: A
authors.lastname: Ziad
authors.forename: Matthias
authors.initials: M
authors.lastname: Schöck
authors.forename: Gary A
authors.initials: GA
authors.lastname: Chanan
authors.forename: Mitchell
authors.initials: M
authors.lastname: Troy
authors.forename: Richard
authors.initials: R
authors.lastname: Dekany
authors.forename: Benjamin F
authors.initials: BF
authors.lastname: Lane
authors.forename: Julien
authors.initials: J
authors.lastname: Borgnino
authors.forename: François
authors.initials: F
authors.lastname: Martin