Sky coverage modeling for the whole sky for laser guide star multiconjugate adaptive optics.
Sky coverage modeling for the whole sky for laser guide star multiconjugate adaptive optics.
复制标题
激光导星多共轭自适应光学器件的整个天空的天空覆盖建模。
作者：
Lianqi Wang;D. Andersen;B. Ellerbroek
激光导星自适应光学系统的科学生产力在很大程度上取决于天空覆盖率，它描述了尖端/倾斜波前传感器找到自然导星以达到一定性能的概率。了解天空覆盖范围对天文学家规划观测也很重要。本文提出了一种计算激光导星多共轭自适应光学系统窄场红外自适应光学系统（NFIRAOS）的有效方法，该系统是为30米望远镜项目设计的。研究表明，NFIRAOS可以在191 nm的总rms波前条件下，对大部分可达天空实现70%以上的覆盖。
The scientific productivity of laser guide star adaptive optics systems strongly depends on the sky coverage, which describes the probability of finding natural guide stars for the tip/tilt wavefront sensor(s) to achieve a certain performance. Knowledge of the sky coverage is also important for astronomers planning their observations. In this paper, we present an efficient method to compute the sky coverage for the laser guide star multiconjugate adaptive optics system, the Narrow Field Infrared Adaptive Optics System (NFIRAOS), being designed for the Thirty Meter Telescope project. We show that NFIRAOS can achieve more than 70% sky coverage over most of the accessible sky with the requirement of 191 nm total rms wavefront.