| 斑点干涉术统计结果的信噪比模拟和分析 |
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| 引用本文： | 向永源,金振宇.斑点干涉术统计结果的信噪比模拟和分析[J].天文研究与技术,2011(3). |
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| 作者姓名： | 向永源 金振宇 |
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| 作者单位： | 中国科学院国家天文台云南天文台; |
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| 基金项目： | 国家自然科学基金(10873033)资助 |
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| 摘 要： | 高分辨统计重建中,随机误差影响着统计结果的信噪比,从而限制了探测目标时所能达到的精度。通过推导给出了单星斑点干涉术统计结果信噪比的数学表达式,并模拟计算了不同视宁度参量r0和不同光子数下斑点图统计功率谱环带上的信噪比,模拟计算结果和理论数学模型吻合较好,最后对一些实测数据进行了处理和分析。
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| 关 键 词： | 斑点干涉术 传递函数 信噪比 |
Simulation and Analysis of Signal-to-Noise Ratios for Statistics of Speckle Interferometry |
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| Xiang Yongyuan,Jin Zhenyu.Simulation and Analysis of Signal-to-Noise Ratios for Statistics of Speckle Interferometry[J].Astronomical Research & Technology,2011(3). |
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| Authors: | Xiang Yongyuan Jin Zhenyu |
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| Institution: | Xiang Yongyuan,Jin Zhenyu(National Astronomical Observatories/Yunnan Observatory,Chinese Academy of Sciences,Kunming 650011,China) |
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| Abstract: | In speckle interferometry,random errors affect signal-to-noise ratios of statistical results of a reconstruction algorithm and thus limit the reconstruction accuracy.This paper gives a derivation of a theoretical expression of signal-to-noise ratios of the transfer function in speckle interferometry.We then simulate the signal-to-noise ratios of spectral powers within two-dimensional system frequency ranges under various values of a parameter r.and photon number.The simulation results agree well with the th... |
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| Keywords: | Speckle Interferometry Transfer Function Signal-to-noise ratio |
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