论文标题
测量偶数环图像的湍流曲线
Measurement of turbulence profile from defocused ring images
论文作者
论文摘要
小型望远镜中明亮的单星的散焦图像包含有关光学湍流的丰富信息，即看见。提出了基于环状局内图像的记录序列及其分析的新型湍流监视器的概念。它可以使用标准廉价望远镜和相机实施。环中强度波动及其径向运动的统计数据允许测量低分辨率的湍流曲线，总视力和大气时间常数。开发并通过数值模拟进行了广泛的测试，并提取湍流参数的算法并提取湍流参数。给出了纠正有限暴露时间和部分饱和闪烁的处方。在天空上测试了具有0.13米光圈的原型仪器。戒指（环形图像下一代闪烁传感器）可用作用于现场测试的便携式湍流监视器，并用作现有观察显示器的升级。
A defocused image of a bright single star in a small telescope contains rich information on the optical turbulence, i.e. the seeing. The concept of a novel turbulence monitor based on recording sequences of ring-like intrafocal images and their analysis is presented. It can be implemented using standard inexpensive telescopes and cameras. Statistics of intensity fluctuations in the rings and their radial motion allow measurement of the low-resolution turbulence profile, the total seeing, and the atmospheric time constant. The algorithm of processing the images and extracting the turbulence parameters is developed and extensively tested by numerical simulation. Prescriptions to correct for finite exposure time and partially saturated scintillation are given. A prototype instrument with a 0.13-m aperture was tested on the sky. The RINGSS (Ring-Image Next Generation Scintillation Sensor) can be used as a portable turbulence monitor for site testing and as an upgrade of existing seeing monitors.
