Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

From the grating scale monitor to the generalized seeing monitor

Not Accessible

Your library or personal account may give you access

Abstract

An instrument named the grating scale monitor for measuring the outer scale ℒ0 from the angle-of-arrival (AA) fluctuations of a perturbed wave front was developed a few years ago at Nice University. The AA is detected with a 5-ms time resolution by modulation of the stellar image in a small telescope with a grating. One uses the normalized covariance of AA fluctuations to estimate ℒ0. A new version of this instrument, the generalized seeing monitor (GSM) is described. It consists of four identical modules for measuring the AA at four locations on the wave front. A spatiotemporal analysis of these data leads to the determination of seeing ∊0, outer scale ℒ0, and the wave-front speed. In addition, isoplanatic angle θ0 is determined from scintillation, making the characterization of turbulence with the GSM almost complete. We describe the instrument and make a detailed analysis of its performance and accuracy. Several site-testing campaigns have been conducted with the GSM: at La Silla (Chile), Oukaïmeden (Morocco), Maidanak (Uzbekistan), and Cerro Pachon and Cerro Paranal (Chile). The main results of these campaigns are presented and discussed.

© 2000 Optical Society of America

Full Article  |  PDF Article
More Like This
Comparison of measurements of the outer scale of turbulence by three different techniques

Aziz Ziad, Matthias Schöck, Gary A. Chanan, Mitchell Troy, Richard Dekany, Benjamin F. Lane, Julien Borgnino, and François Martin
Appl. Opt. 43(11) 2316-2324 (2004)

Theoretical spatiotemporal analysis of angle of arrival induced by atmospheric turbulence as observed with the grating scale monitor experiment

Remy Avila, Aziz Ziad, Julien Borgnino, François Martin, Abdelkrim Agabi, and Andrey Tokovinin
J. Opt. Soc. Am. A 14(11) 3070-3082 (1997)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (10)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (24)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved