| 基于氧气A吸收带的baseline拟合距离反演算法 |
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| 引用本文： | 宗鹏飞,王志斌,陈媛媛,陈友华.基于氧气A吸收带的baseline拟合距离反演算法[J].光散射学报,2013,25(1):79-84. |
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| 作者姓名： | 宗鹏飞 王志斌 陈媛媛 陈友华 |
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| 作者单位： | 中北大学山西省光电信息与仪器工程技术研究中心,山西太原030051;中北大学仪器科学与动态测试教育部重点实验室,山西太原030051 |
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| 基金项目： | 国家自然基金仪器专项基金(61127015);国家自然科学基金项目(61040062);国际科技合作项目(S2012ZR0247);山西省国际科技合作项目(2010081038) |
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| 摘 要： | 目标红外被动测距的实现同气体及其波段的选取密切相关。氧气A吸收带具有独特的谱线结构,对于火箭羽流或者高温辐射体的距离探测,氧气A吸收带是最佳的距离反演通道。利用该特点,详细研究了逐线积分算法(LBLRTM),并设计了氧气A带吸收系数及标准光谱计算软件;利用A吸收带吸收光谱带外数据,采用多项式拟合方法,实现基线(baseline)拟合,进而得到带平均透过率;在不同的距离条件下,将两种带平均透过率进行对比,误差在1.9%左右,拟合精度较高,该方法为后续距离的精确反演提供了理论依据。
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| 关 键 词： | 被动测距 氧气A吸收带 逐线积分(LBLRTM) baseline 带平均透过率 |
| 收稿时间： | 2012/4/12 |
Oxygen ’A’ Absorption Band LBLRTM and Distance Inversion Algorithm Based on Baseline Fitting |
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| ZONG Peng-fei
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WANG Zhi-bin
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CHEN Yuan-yuan
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CHEN You-hua.Oxygen ’A’ Absorption Band LBLRTM and Distance Inversion Algorithm Based on Baseline Fitting[J].Chinese Journal of Light Scattering,2013,25(1):79-84. |
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| Authors: | ZONG Peng-fei WANG Zhi-bin CHEN Yuan-yuan CHEN You-hua |
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| Institution: | 1,2(1.Shanxi Provincial Research Center for Opto-electronic Information and Instrument Engineering Technology,Taiyuan 030051,China; 2.Key Laboratory of Instrumentation Science & Dynamic Measurement(North University of China),Ministry of Education,Taiyuan 030051,China) |
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| Abstract: | Realization of passive ranging based on infrared radiation has high correlation with band selection of gas.Oxygen 'A' absorption band has an unique spectral structure.The band is the best inversion channel of distance,such as detecting rocket plume and high temperature radiation.LBLRTM is researched in detail and the software of oxygen'A'band absorption coefficient and spectrum calculation is designed using its specialty.Making use of the out-of-band data,band average transmittance is obtained by polynomial fitting baseline.Finally,under the different distance conditions,through the comparison of the two transmittance,the error is about 1.9%.So,this method provides the subsequent distance inversion with theoretical foundation. |
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| Keywords: | passive ranging oxygen ‘A’ absorption band LBLRTM baseline band average transmittance |
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