作为国家大型光学望远镜场地勘测一部分的月球闪烁仪的研制
Development of a Lunar Scintillometer as part of the National Large Optical Telescope Site Survey
摘要：
地面层湍流是一个非常重要的站点特征参数，用于评估天文站点的质量。月面闪烁仪是一种简单有效的测量近地面层湍流的现场测试装置。它由光电二极管线性阵列组成，这些光电二极管对月球亮度的微小变化非常敏感，这是由于地球大气层较低层的闪烁造成的。非冗余光电二极管基线之间的强度值的协方差可以用于测量从地面到由最远的一对检测器确定的高度的湍流轮廓。印度天体物理研究所开发的六通道月球表面测量仪是以智利Cerro Tololo美洲天文台（CTIO）的Andrei Tokovinin领导的团队建造的仪器为基础的。我们已经根据现有的电子设计制作了仪器，并进行了噪声分析，抗EMI（电磁感应）PCB设计和软件管道分析数据。还介绍了该仪器在汉勒萨拉斯瓦蒂山进行的多年活动的结果。
英文摘要：
Ground layer turbulence is a very important site characterization parameter used to assess the quality of an astronomical site. The Lunar Scintillometer is a simple and effective site-testing device for measuring the ground layer turbulence. It consists of a linear array of photodiodes which are sensitive to the slight variations in the moon's brightness due to scintillation by the lower layers of the Earth's atmosphere. The covariance of intensity values between the non-redundant photodiode baselines can be used to measure the turbulence profile from the ground up to a height determined by the furthest pair of detectors. The six channel lunar scintillometer that has been developed at the Indian Institute of Astrophysics is based closely on an instrument built by the team led by Andrei Tokovinin of Cerro Tololo Inter-American Observatory (CTIO), Chile. We have fabricated the instrument based on the existing electronic design, and have worked on the noise analysis, an EMI (Electromagnetic Induction) resistant PCB design and the software pipeline for analyzing the data from the same. The results from the instrument's multi-year campaign at Mount Saraswati, Hanle is also presented.
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