Estimating the outer scale in altitude - L0(h) - using the GeMS profiler
Date Issued
2015
Author(s)
Guesalaga, A.
•
Neichel, B.
•
Fusco, T.
•
Oberti, S.
•
Valenzuela, J.
•
•
Correia, C.
•
Sauvage, J. F.
Abstract
We analyze the altitude distribution of the turbulence outer scale - L0(h) - at Cerro Pachon from Gemini South MCAO (GeMS) loop data. GeMS turbulence profiler is fed with telemetry from their 5 WFSs and from the voltages applied to the deformable mirrors, providing estimations of r0, Cn2(h), wind profile (speed and direction for every layer), isoplanatic angle and the outer scale distribution L0(h). It is shown that this last parameter ranges from less than 1 meter at the ground to more than 50m (the telescope is insensitive to larger cannot detect differences above this value). The technique is based on cross correlations of the pseudo-open-loop slopes that allow to disentangle the multiple constituents of L0.
Coverage
Adaptive Optics for Extremely Large Telescopes IV (AO4ELT4)
Conferenece
Adaptive Optics for Extremely Large Telescopes IV (AO4ELT4)
Conferenece place
UCLA Conference Center in Southern California
Conferenece date
26-30 October 2015
Ads BibCode
2015aoel.confE...4G
Rights
open.access
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