The Durham/ESO SLODAR optical turbulence profiler
The Durham/ESO SLODAR optical turbulence profiler
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Durham/ESO SLODAR 光学湍流剖面仪
DOI：
10.1111/j.1365-2966.2009.15409.x
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发表时间：
2009
影响因子：
4.8
通讯作者：
M. Sarazin
中科院分区：
文献类型：
--
作者：
R. Wilson;T. Butterley;M. Sarazin
达勒姆大学和欧洲南方天文台研制了一种监测大气光学湍流强度垂直廓线的仪器，该仪器采用了适用于小型望远镜的斜率探测和测距（SLODAR）双星星星技术。该系统已部署在智利的Cerro Paranal天文台，用于该站点的统计特性。该仪器的配置是在1.5公里以下的高度对湍流进行采样，垂直分辨率约为170米。该系统还可作为通用视宁度监测器，测量整个大气的综合光学湍流强度，从而测量视宁度宽度。我们给出了原型的技术细节，并提供了表征其性能的数据。比较从差分图像运动监视器（DIMM）和多孔径闪烁传感器（MASS）的同期测量进行了讨论。在帕拉纳尔网站的光学湍流轮廓的统计结果。我们发现，在中位数的情况下，总光学湍流强度的49%与表面层（低于100米），35%与“自由大气”（1500米以上）和16%与中间高度（100-1500米）。
An instrument for monitoring of the vertical profile of atmospheric optical turbulence strength, employing the Slope Detection and Ranging (SLODAR) double star technique applied to a small telescope, has been developed by Durham University and the European South Observatory. The system has been deployed at the Cerro Paranal observatory in Chile for statistical characterization of the site. The instrument is configured to sample the turbulence at altitudes below 1.5 km with a vertical resolution of approximately 170 m. The system also functions as a general-purpose seeing monitor, measuring the integrated optical turbulence strength for the whole atmosphere, and hence the seeing width. We give technical details of the prototype and present data to characterize its performance. Comparisons with contemporaneous measurements from a differential image motion monitor (DIMM) and a multi-aperture scintillation sensor (MASS) are discussed. Statistical results for the optical turbulence profile at the Paranal site are presented. We find that, in the median case, 49 per cent of the total optical turbulence strength is associated with the surface layer (below 100 m), 35 per cent with the ‘free atmosphere’ (above 1500 m) and 16 per cent with the intermediate altitudes (100–1500 m).