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High fidelity sky coverage analysis via time domain adaptive optics simulations

机译:通过时域自适应光学仿真进行高保真天空覆盖分析

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摘要

We describe a high fidelity simulation method for estimating the sky coverage of multiconjugate adaptive optics systems; this method is based upon the split tomography control architecture, and employs an AO simulation postprocessing technique to evaluate system performance with hundreds of randomly generated natural guide star (NGS) asterisms. A novel technique to model the impact of quadratic wavefront aberrations upon the NGS point spread functions is described; this is used to model the variations in system performance with different asterisms, and is crucial for obtaining accurate results with the post-processing technique. Several design and algorithm improvements help to reduce the residual wavefront error in the tip/tilt and plate scale modes that are controlled using the NGS asterism. These improvements include choosing the right wavefront sensor (WFS) pixel size, optimal pixel weights, and type II control of the plate scale modes.
机译:我们描述了一种高保真度仿真方法,用于估计多共轭自适应光学系统的天空覆盖范围;该方法基于分裂层析成像控制体系结构,并采用AO模拟后处理技术来评估具有数百个随机生成的自然导星(NGS)星号的系统性能。描述了一种模拟二次波前像差对NGS点扩展函数的影响的新技术;它用于对具有不同星号的系统性能的变化进行建模,并且对于使用后处理技术获得准确的结果至关重要。多项设计和算法改进帮助减少了使用NGS星号控制的尖端/倾斜和平板比例模式下的残留波前误差。这些改进包括选择正确的波前传感器(WFS)像素大小,最佳像素权重以及平板刻度模式的II型控制。

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