Acta Optica Sinica, Volume. 40, Issue 15, 1528002(2020)

Onboard Polarization Calibration Technique of Multi-Angle Polarization Imager Based on Sun Glint from Ocean

Yipeng Zhang1,2、*, Xiuqing Hu3、**, Dekui Yin1、***, and Mingjian Gu1
Author Affiliations
  • 1Key Laboratory of Infrared System Detection & Imaging Technology, Shanghai Institute of Technical Physics, Chinese Academy of Sciences, Shanghai 200083, China;
  • 2Chinese Academy of Sciences University, Beijing 100049, China
  • 3National Satellite Meteorological Center, Beijing 100081, China
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    Figures & Tables(16)
    Schematic of MAPI
    Multi-angle imaging principle of MAPI
    Relationship between incident angle and DOLP
    Micro-plane model
    Effect of wind speed on reflectance of sun glint
    Relationship between ρTOA and ξ
    Relationship between ρatm* and ξ with different wind speeds
    Comparison of PTOA and Pre
    Comparison between observed DOLP and retrieved DOLP with different β. (a) ββ<7°
    DOLP of flare at 865 nm channel. (a) Observed DOLP of POLDER 3;(b) retrieved DOLP
    Comparison between observed DOLP of POLDER 3 and retrieved DOLP at different channels. (a) 865 nm; (b) 670 nm; (c) 490 nm
    DOLP of MAPI at 865 nm channel. (a) Observed DOLP of MAPI;(b) retrieved DOLP
    Comparison between MAPI observed DOLP and retrieved DOLP at different channels. (a) 865 nm; (b) 670 nm; (c) 490 nm
    • Table 1. Parameter setting of MAPI channels

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      Table 1. Parameter setting of MAPI channels

      ChannelCentral wavelength /mmPolarization
      B10.565Yes
      B20.670Yes
      B30.865Yes
      B40.763No
      B50.765No
      B60.910No
    • Table 2. Evaluation results of four models

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      Table 2. Evaluation results of four models

      ChannelParameterCMGC modelCMA modelBHGC modelBHA model
      Correlation coefficient0.9650.9660.9650.966
      865 nmIntercept0.0160.0130.0170.002
      Slope0.9460.9370.9420.987
      Correlation coefficient0.9470.9470.9470.948
      670 nmIntercept0.0160.0220.0150.017
      Slope0.9240.9260.9250.929
      Correlation coefficient0.9290.9270.9280.927
      490 nmIntercept-0.018-0.008-0.009-0.011
      Slope1.0421.0521.0431.062
    • Table 4. Uncertainty of degree of polarization of three channels

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      Table 4. Uncertainty of degree of polarization of three channels

      Channel865 nm670 nm565 nm
      Hypothesisuncertainty /%0.110.140.21
      Wind speeduncertainty /%1.181.181.19
      Water-leavingradiance uncertainty /%00.020.08
      Foam reflectanceuncertainty /%0.010.010.01
      Optical thicknessuncertainty /%0.790. 760. 76
      Synthetic uncertainty /%1.421.411.43
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    Yipeng Zhang, Xiuqing Hu, Dekui Yin, Mingjian Gu. Onboard Polarization Calibration Technique of Multi-Angle Polarization Imager Based on Sun Glint from Ocean[J]. Acta Optica Sinica, 2020, 40(15): 1528002

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    Paper Information

    Category: Remote Sensing and Sensors

    Received: Dec. 26, 2019

    Accepted: Apr. 30, 2020

    Published Online: Aug. 14, 2020

    The Author Email: Zhang Yipeng (zyp_47@163.com), Hu Xiuqing (huxq@cma.gov.cn), Yin Dekui (yin@mail.sitp.ac.cn)

    DOI:10.3788/AOS202040.1528002

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