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文摘
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光波在大气中传输时,由于湍流的存在导致相位扰动造成光电系统的成像质量下降。自适应光学系统用于校正湍流的影响,但优化自适应光学系统性能以及大型望远镜在选址、设计和运行时都需要监测台址的光学湍流强度及其积分参数。测量高空大气光学湍流需要耗费巨大的人力、物力和财力,并且由于测量方法的限制难以在全国大范围连续地测量。介绍了基于数值天气预报(WRF)模式,依据湍流参数化模型模拟得到光学湍流强度廓线。模拟结果与在高美古观测站探空实测数据进行了对比,结果表明模拟的光学湍流强度廓线展现了高空大气光学湍流廓线的变化特征,与实测结果基本一致。 |
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其他语种文摘
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When electromagnetic waves propagate through the atmosphere, the turbulence causes phase fluctuations and degrades the image quality of the photoelectric system. Adaptive optics is used to correct the effect of atmospheric turbulence, but in order to optimize system performance, as well as the large telescope sitting, designing and operating, monitoring optical turbulence intensity and integral parameters of the observing stations are necessary. Measuring atmospheric optical turbulence takes a huge labor, materials and financial resources, and it is difficult to measure a large region continuously. The weather research and forecasting (WRF) model is introduced based on the optical turbulence parameterization, the profiles of the optical turbulence intensity are simulated using turbulence parameterized model. Simulation results are compared with measurements at Gaomeigu observing station, the results show that the simulation profiles emerge the variation tendency of the upper air atmospheric optical turbulence, and basically coincide with the measurements. |
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来源
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中国激光
,2015,42(9):0913001-1-0913001-8 【核心库】
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DOI
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10.3788/CJL201542.0913001
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关键词
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大气光学
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湍流廓线
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数值天气预报模式
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参数化
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探空
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地址
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中国科学院安徽光学精密机械研究所, 中国科学院大气成分与光学重点实验室, 安徽, 合肥, 230031
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0258-7025 |
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学科
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物理学 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:5546394
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