傅里叶解析下的大气探测仪归一化穆勒元素
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摘要
随着大气遥感信息的定量化精度不断提高,遥感信息定量化链路中偏振修正因子逐渐引起重视。因此研究大气探测仪器的偏振特性,解析归一化穆勒元素,对大气偏振特性引起的遥感信息定量误差以及偏振修正十分必要,然而常用来描述仪器偏振特性的偏振灵敏度是系统偏振响应的综合体现,而不能准确表征系统的偏振特点。对大气探测仪归一化穆勒元素傅里叶解析方法进行研究,应用仪器在不同偏振方位角下的线偏振光响应曲线,然后采用傅里叶级数拟合的方式得到系统响应函数,进而得到大气探测仪的归一化穆勒元素m2、m3。对不同阶数傅里叶级数拟合得到的归一化穆勒元素进行对比,结果表明偏差<0.12%。最后对归一化穆勒元素的测试精度进行分析,综合误差优于0.96%,为大气探测器归一化穆勒元素的在轨应用奠定基础。
As the quantitative precision of remote sensing information is higher and higher,the polarization correction factor attracts more attention. Therefore, the research on the polarization feature of remote sensors and obtaining normalized Muller elements is necessary, which play an important role in the quantitative research of remote sensing information and polarization correction. However, the polarization sensitivity cannot reflect the polarization feature, which is the comprehensive reflection of polarization response. The analytic method of normalized Muller elements was studied by Fourier series fitting, and the polarization response of remote sensors was obtained. And then the normalized Muller elements m2, m3 were calculated by the polarization response, based on Fourier series fitting. The normalized Muller elements at different Fourier orders were analyzed, and the relative deviation was better than 0.12%. Finally the test error of normalized Muller elements was analyzed, which was better than 0.96%, and the research has further application for the normalized Mueller elements of the remote sensors.
As the quantitative precision of remote sensing information is higher and higher,the polarization correction factor attracts more attention. Therefore, the research on the polarization feature of remote sensors and obtaining normalized Muller elements is necessary, which play an important role in the quantitative research of remote sensing information and polarization correction. However, the polarization sensitivity cannot reflect the polarization feature, which is the comprehensive reflection of polarization response. The analytic method of normalized Muller elements was studied by Fourier series fitting, and the polarization response of remote sensors was obtained. And then the normalized Muller elements m2, m3 were calculated by the polarization response, based on Fourier series fitting. The normalized Muller elements at different Fourier orders were analyzed, and the relative deviation was better than 0.12%. Finally the test error of normalized Muller elements was analyzed, which was better than 0.96%, and the research has further application for the normalized Mueller elements of the remote sensors.
引文
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[2]Li Xiaolu,Li Yunye,Xie Xinhao,et al.Laser polarization imaging models based on leaf moisture content[J].Infrared and Laser Engineering,2017,46(11):1106004.(in Chinese)
[3]Ke Zibo,Li Yanfei,Wu Shuipin,et al.Design and verification of 2Πspace all-sky polarization observation system[J].Infrared and Laser Engineering,2018,47(4):0417002.(in Chinese)
[4]Zhang Jing,Wang Shurong,Huang Yu,et al.Status and development of limb imaging spectrometers[J].Chinese Optics,2013,6(5):692-700.(in Chinese)
[5]No1 S,Bovensmann H,Burrows J P,et al.The SCIAMACHY instrument on ENVISAT-1[C]//SPIE,1998,3498:94-104.
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[7]Lin Guanyu,Wang Shurong,Cao Diansheng.Study for method polarization correction on ultraviolet atmospheric spectral radiation based on Stokes vector[J].Chinese Journal of Lasers,2014,41(8):0813001.(in Chinese)
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[11]Song Zhiping,Yin Yumeng,Zhang Minghui,et al.Verification of PSIM system based on tunable polarization light source[J].Optics and Precision Engineering,2016,24(3):477-481.(in Chinese)
[12]Zhao Facai.The study on polarization correction of imaging spectrometer for space-borne ultraviolet atmospheric remote sensing[D].Beijing:University of Chinese Academy of Sciences,2012.(in Chinese)
[13]Yang Bin,Yan Changxiang,Zhang Junqiang,et al.Polari-metric calibration of multi-channel polar-metric imager[J].Optics and Precision Engineering,2017,25(7):1126-1134.(in Chinese)
[14]Li Jinjin,Sun Xiaobing,Kang Qing,et al.Polarization detection accuracy analysis of spectropolarimeter[J].Infrared and Laser Engineering,2018,47(1):0123002.(in Chinese)
[15]Li Zhigang.High accuracy spectroradiometric standard light source based on detector standard[J].Chinese Optics,2015,8(6):909-918.(in Chinese)