CO-SLIDAR Cn2剖面仪的首次天空观测结果
First on-sky results of the CO-SLIDAR Cn2 profiler
摘要：
CO-SLIDAR是近年来发展起来的一种大气湍流强度垂直分布（$C_n^2$廓线）的探测方法。它利用了斜率和闪烁的相关性，两者都是用双星上的Shack-Hartmann波前传感器测量的。本文介绍了改进的$C_n^2$轮廓线的CO-SLIDAR重建方法和CO-SLIDAR轮廓线仪的首次实测结果。我们研究了CO-SLIDAR的最新性能模拟，考虑到检测噪声偏差和估计误差条以及湍流轮廓。估算的$C_n^2$廓线证明了CO-SLIDAR方法的准确性，对低空和高空湍流层都表现出敏感性。在法国蓝色海岸天文台的$1.5$ ~m MeO（光学气象学）望远镜上首次对CO-SLIDAR进行了天空测试。重建的轮廓比较湍流廓线估计从气象资料和一个很好的协议found. We讨论了CO-SLIDAR的贡献，在$C_n^2$廓线的景观，我们提出了一些改进的仪器。
英文摘要：
COupled SLope and scIntillation Detection And Ranging (CO-SLIDAR) is a recent profiling method of the vertical distribution of atmospheric turbulence strength ($C_n^2$ profile). It takes advantage of correlations of slopes and of scintillation, both measured with a Shack-Hartmann wavefront sensor on a binary star. In this paper, we present the improved CO-SLIDAR reconstruction method of the $C_n^2$ profile and the first on-sky results of the CO-SLIDAR profiler. We examine CO-SLIDAR latest performance in simulation, taking into account the detection noise bias and estimating error bars along with the turbulence profile. The estimated $C_n^2$ profiles demonstrate the accuracy of the CO-SLIDAR method, showing sensitivity to both low and high altitude turbulent layers. CO-SLIDAR is tested on-sky for the first time, on the $1.5$~m MeO (Métrologie Optique) telescope at Observatoire de la Cote d'Azur (France). The reconstructed profiles are compared to turbulence profiles estimated from meteorological data and a good agreement is found. We discuss CO-SLIDAR's contribution in the $C_n^2$ profilers' landscape and we propose some improvements of the instrument.
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