Site testing for space situational awareness with single-detector stereo-SCIDAR
Site testing for space situational awareness with single-detector stereo-SCIDAR
复制标题
使用单探测器立体 SCIDAR 进行空间态势感知现场测试
DOI：
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
F. Bennet
中科院分区：
文献类型：
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作者：
E. Thorn;D. Grosse;F. Rigaut;F. Bennet
天文学和天体物理学研究学院 (RSAA) 与空间环境研究中心 (SERC) 正在联合开发一种单探测器立体 SCIDAR 系统，用于表征位于堪培拉郊外的澳大利亚国立大学斯特罗姆洛山天文台上空的大气湍流。斯特罗姆洛山天文台的 EOS 空间系统望远镜未来将用于跟踪空间碎片，以提高空间态势感知（SSA）。自适应光学（AO）系统将用于提高位于现场的 1.8m 碎片测距望远镜的分辨率。 SCIDAR 系统将测量有价值的数据，包括折射率结构常数、C n 和风速剖面。同样令人感兴趣的是 Fried 参数 r0 和湍流时间相干时间 τ0 的值，它们将用于优化 AO 系统的可变形镜致动器节距和校正率。该系统将以两种模式使用：广义 SCIDAR 和广义立体声 SCIDAR。广义 SCIDAR 模式将重叠探测器上双星的光瞳图像，而广义立体 SCIDAR 模式将分离光瞳图像。这些双星闪烁图案的后处理短曝光将提取大气湍流层的高度信息。另一个组织设计的立体 SCIDAR 系统将瞳孔图像分离到一对单独的探测器上。然而，我们的光学设计利用复合屋脊棱镜来分离瞳孔图像并将其记录在单个探测器上。我们讨论了立体 SCIDAR 系统的光学和机械设计，用于测量高度约 15 公里、间隔 10 至 25 角秒的双星的闪烁图案。
A single-detector stereo-SCIDAR system is being developed by the Research School of Astronomy and Astrophysics (RSAA) in conjunction with the Space Environment Research Centre (SERC) to characterise atmospheric turbulence above the Australian National University’s Mount Stromlo observatory just outside Canberra. The EOS Space System’s telescope at the Mount Stromlo observatory is to be used in future to track space debris to improve space situational awareness (SSA). Adaptive optics (AO) systems will be used to improve the resolution of the 1.8m debris ranging telescope located at the site. The SCIDAR system will measure valuable data including refractive index structure constant, C n, and wind speed profiles. Also of interest are values of the Fried parameter, r0, and the turbulence temporal coherence time, τ0, which will be used to optimise the AO systems’ deformable mirror actuator pitch and correction rate. This system will be used in two modes: generalised SCIDAR and generalised stereo-SCIDAR. The generalised SCIDAR mode will overlap the pupil images of double stars on the detector whilst the generalised stereo-SCIDAR mode will separate the pupil images. Post-processed short exposures of the scintillation patterns of these double stars will extract altitude information of atmospheric turbulent layers. A stereo-SCIDAR system designed by another organisation separated pupil images onto a pair of separate detectors. However, our optical design utilises a compound roof prism to separate the pupil images and record them on a single detector. We discuss the optical and mechanical design of a stereo-SCIDAR system to measure the scintillation patterns of double stars separated by 10 to 25 arcseconds up to an altitude of approximately 15 km.
影响因子：
4.8
作者：
H. Shepherd;J. Osborn;R. Wilson;T. Butterley;R. Avila;V. Dhillon;T. Morris
通讯作者：
H. Shepherd;J. Osborn;R. Wilson;T. Butterley;R. Avila;V. Dhillon;T. Morris