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arXiv 0904.0142astro-ph.IM
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泰德天文台与风速有关的自适应光学参数

Adaptive Optics Parameters connection to wind speed at the Teide Observatory

B. Garcia-Lorenzo, A. Eff-Darwich, J. J. Fuensalida, J. Castro-Almazan

摘要:

目前的大型望远镜项目需要适当的大气湍流的知识,以设计有效的自适应光学系统,以达到大斯特列尔比。然而,对特定地点上方的湍流的适当表征需要长期监测。由于缺乏湍流的长期信息,建议将高空风(特别是200毫巴气压水平的风)作为估计特定地点总湍流的参数,其优点是可以追溯到几十年前的风记录。我们提出了第一个完整的研究大气自适应光学参数以上的泰德天文台(加那利群岛,西班牙)的风速。现场测量的CN 2(h)剖面(超过20200湍流廓线)从G-SCIDAR观测和风垂直廓线从气球已被用来计算视宁度,等晕角和相干时间。这些参数在地面和200毫巴的压力水平的风速的连接示出和讨论。我们的研究结果证实了加那利群岛天文观测站的高质量。

英文摘要:

Current projects for large telescopes demand a proper knowledge of atmospheric turbulence to design efficient adaptive optics systems in order to reach large Strehl ratios. However, the proper characterization of the turbulence above a particular site requires long-term monitoring. Due to the lack of long-term information on turbulence, high-altitude winds (in particular winds at the 200 mbar pressure level) were proposed as a parameter for estimating the total turbulence at a particular site, with the advantage of records of winds going back several decades. We present the first complete study of atmospheric adaptive optics parameters above the Teide Observatory (Canary Islands, Spain) in relation to wind speed. On-site measurements of CN2(h) profiles (more than 20200 turbulence profiles) from G-SCIDAR observations and wind vertical profiles from balloons have been used to calculate the seeing, the isoplanatic angle and the coherence time. The connection of these parameters to wind speeds at ground and 200 mbar pressure level are shown and discussed. Our results confirm the well-known high quality of the Canary Islands astronomical observatories.

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