Measurement of optical turbulence in free atmosphere above Mt.Maidanak in 2005-2007
V. Kornilov (1), S. Ilyasov (2), O. Voziakova (1), Yu. Tillaev (2), B., Safonov (1), M. Ibragimov (2), N. Shatsky (1), S. Ehgamberdiev (2) ((1), Sternberg astron. inst., Moscow, Russia, (2) Ulughbek astron. inst.,, Tashkent, Uzbekistan)
TL;DR
This study measures optical turbulence above Mt. Maidanak from 2005 to 2007 using MASS, revealing median seeing of 0.46 arcsec and an isoplanatic angle of 2.47 arcsec, favorable for adaptive optics.
Contribution
It provides the first detailed vertical distribution of optical turbulence at Mt. Maidanak using MASS over a multi-year period.
Findings
Median seeing in free atmosphere is 0.46 arcsec.
Median isoplanatic angle is 2.47 arcsec.
Atmospheric coherence time is about 7 ms.
Abstract
Results of 2005-2007 campaign of measurement of the optical turbulence vertical distribution above Mt. Maidanak are presented. Measurements are performed with the MASS (Multi-Aperture Scintillation Sensor) device which is widely used in similar studies during last years at several observatories across the world. The data analysis shows that median seeing in free atmosphere (at altitudes above 0.5km) is 0.46 arcsec and median isoplanatic angle is 2.47 arcsec. Given a rather long atmospheric coherence time (about 7 ms when the seeing is good) such conditions are favorable for adaptive optics and interferometry in the visible and near-IR.
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