The Generalized Seeing Monitor is an experiment dedicated to the measurement of parameters which characterize the optical properties of wave fronts incident on the ground, corrugated by atmospheric turbulence, from the point of view of High Angular Resolution in Astronomy (Adaptive Optics and Long Baseline Interferometry). These parameters are Fried's parameter, spatial coherence outer scale, isoplanatic patch size and time constants.
The experiment consists in 4 independent synchronized modules measuring angle of arrival fluctuations at 4 points of the wave front with 10 cm telescopes. Parameters of interest are deduced from spatio-temporal statistical analyses of these fluctuations.
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The team
H.A.R
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News 2001 ... 
December
GSM is working at the top of Mauna Kea with Keck, Gemini and Subaru teams. Click on the pictures to enlarge them. MaunaKea December 2001 (Click to enlarge) MaunaKea December 2001 (Click to enlarge)
September
GSM is working at Mont Palomar simultaneously with PTI and the 200-inch Hale telescope
Click on the picture to enlarge it.		 Palomar September 2001 (Click to enlarge)
July New version of the GSM web site with a new design. It offers also the ability to download the GSM data.
January  Publication in Astronomy and Astrophysics of : "The first optical characterization of the Oukaïmden site with the Generalized Seeing Monitor".
News 2000 ... 
November 31  Defense of the PhD thesis of Rodolphe Conan: "Modelization of the effects of the spatial coherence outer scale of the wave front in observation at High Angular Resolution in Astronomy".
November  Publication in Applied Optics of : "From the Grating Scale Monitor to the Generalized Seeing Monitor".
September  Publication in J. Opt. Soc. Amer. A of : "Analytical solution for the covariance and for the decorrelation time of the angle of arrival of a wave front corrugated by atmospheric turbulence".
May  Publication in Astronomy & Astrophysics Supplement Series May II 2000 of the results of the Paranal observatory site testing campaign with the GSM : "Optical parameters relevant for High Angular Resolution at Paranal from GSM instrument and surface layer contribution".
March
27-31 		 Preprint and viewgraphs of the presentation at the SPIE's international Symposium : Astronomical Telescopes and Instrumentation 2000 

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