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arXiv 1207.4229astro-ph.IMphysics.ao-ph
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欧洲极大望远镜站址表征II:高角分辨率参数

European Extremely Large Telescope Site Characterization II: High angular resolution parameters

Héctor Vázquez Ramió, Jean Vernin, Casiana Muñoz-Tuñón, Marc Sarazin, Antonia M. Varela, Hervé Trinquet, José Miguel Delgado, Jesús J. Fuensalida, Marcos Reyes,… 展开作者

Héctor Vázquez Ramió, Jean Vernin, Casiana Muñoz-Tuñón, Marc Sarazin, Antonia M. Varela, Hervé Trinquet, José Miguel Delgado, Jesús J. Fuensalida, Marcos Reyes, Abdelmajid Benhida, Zouhair Benkhaldoun, Diego García Lambas, Youssef Hach, M. Lazrek, Gianluca Lombardi, Julio Navarrete, Pablo Recabarren, Victor Renzi, Mohammed Sabil, Rubén Vrech

摘要:

这是一系列致力于欧洲极大望远镜(E-ELT)网站特性的第二篇文章。在这篇文章中,我们提出了高角分辨率观测的E-ELT在设计研究(DS)阶段的现场测试活动中收集的数据所涉及的参数的主要属性。2008年和2009年,在选定的四个地点进行了观测,以庇护未来的E-ELT(根据ELT-DS合同进行表征):摩洛哥的Aklim山,西班牙的Observatorio del Roque de los Muchachos(ORM),阿根廷的Macón山脉和智利的Cerro Ventarrones。在每个地点采用了同样的技术、仪器和采集程序。在每个站点安装了多孔径闪烁传感器(MASS)和差分图像运动监视器(DIMM)。对每个站点的综合视宁度、自由大气视宁度、边界层视宁度和等晕角进行了全球统计研究,并给出了结果。为了估计其他重要参数,如波前的相干时间和总体参数“相干扩展”,需要风速垂直分布的额外信息。数据来自美国国家海洋和大气管理局(NOAA)的档案。地面风速由自动气象站(AWS)测量。对湍流参数的季节变化、夜间演变和时间稳定性进行了分析。

英文摘要:

This is the second article of a series devoted to European Extremely Large Telescope (E-ELT) site characterization. In this article we present the main properties of the parameters involved in high angular resolution observations from the data collected in the site testing campaign of the E-ELT during the Design Study (DS) phase. Observations were made in 2008 and 2009, in the four sites selected to shelter the future E-ELT (characterized under the ELT-DS contract): Aklim mountain in Morocco, Observatorio del Roque de los Muchachos (ORM) in Spain, Macón range in Argentina, and Cerro Ventarrones in Chile. The same techniques, instruments and acquisition procedures were taken on each site. A Multiple Aperture Scintillation Sensor (MASS) and a Differential Image Motion Monitor (DIMM) were installed at each site. Global statistics of the integrated seeing, the free atmosphere seeing, the boundary layer seeing and the isoplanatic angle were studied for each site, and the results are presented here. In order to estimate other important parameters such as the coherence time of the wavefront and the overall parameter "coherence étendue" additional information of vertical profiles of the wind speed was needed. Data were retrieved from the National Oceanic and Atmospheric Administration (NOAA) archive. Ground wind speed was measured by Automatic Weather Stations (AWS). More aspects of the turbulence parameters such as their seasonal trend, their nightly evolution and their temporal stability were also obtained and analyzed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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