天文成像数值仿真的相位屏模拟方法  

Numerical Simulations of Astronomical Imaging with the Phase-Screen Method

作　　者：常翔[1] 李荣旺[1] 熊耀恒[1] 

机构地区：[1]中国科学院国家天文台/云南天文台,云南昆明650011

出　　处：《天文研究与技术》2012年第1期46-55,共10页Astronomical Research & Technology

基　　金：国家自然科学基金(10778705)资助

摘　　要：通过利用Monte-Carlo方法对湍流相位屏模拟进行验证和分析。给出加入次谐低频补偿相位屏与直接谱反演相位屏的对比结果,并分析了在考虑内外尺度时次谐低频补偿方法的有效性。此外,给出了基于天文观测的多相位屏的湍流分层模型。在此基础上对天文成像进行数值仿真,并给出了仿真结果。In this paper we present a study of simulating turbulence-influenced phase screens. Effects of inner and outer scales of turbulences on phase screens in simulating with different Monte-Carlo methods are analyzed. Our result shows the effectiveness of the SH-FFT method under certain specific astronomical observational conditions. By using multiple-layer model of atmospheric turbulences （ corresponding to multiple phase screens） , we introduce a new method for simulating astronomical images of short and long exposures. Using the new method, we simulated images of a point source with and without the correction by an AO system.

关 键 词：天文成像 数值仿真 大气光学 相位屏模拟 

分 类 号：P427.1[天文地球—大气科学及气象学]