Estimating dome seeing for LSST
Estimating dome seeing for LSST
复制标题
估计 LSST 的圆顶视宁度
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
K. Vogiatzis
中科院分区：
文献类型：
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作者：
J. Sebag;K. Vogiatzis
开始圆顶视宁度是影响地基望远镜光学性能的一个重要因素。先前报道的计算流体动力学（CFD）和光学模拟相结合，以模拟圆顶看到最新的LSST外壳几何形状。为此，高空间分辨率的热非稳态CFD模拟进行了三个不同的望远镜天顶角和四个方位角。这些模拟生成沿着光路的折射率值的时间记录，其被后处理以估计由于圆顶视宁引起的图像退化。这种方法使我们能够获得沿着不同的光路段，组成了整个光路之间的圆顶的入口LSST科学相机的视见贡献的分布。这些结果被用来识别潜在的问题，并指导天文台的设计。在本文中，建模估计进行审查和评估相对于相应的性能分配，并结合其他模拟器的输出来模拟圆顶看到LSST操作过程中的影响。
Begin Dome seeing is a critical effect influencing the optical performance of ground based telescopes. A previously reported combination of Computational Fluid Dynamics (CFD) and optical simulations to model dome seeing was implemented for the latest LSST enclosure geometry. To this end, high spatial resolution thermal unsteady CFD simulations were performed for three different telescope zenith angles and four azimuth angles. These simulations generate time records of refractive index values along the optical path, which are post-processed to estimate the image degradation due to dome seeing. This method allows us to derive the distribution of seeing contribution along the different optical path segments that composed the overall light path between the entrance of the dome up to the LSST science camera. These results are used to recognize potential problems and to guide the observatory design. In this paper, the modeling estimates are reviewed and assessed relative to the corresponding performance allocation, and combined with other simulator outputs to model the dome seeing impact during LSST operations.