Journal of Atmospheric and Environmental Optics

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Polarimetric Satellite Sensors for Earth Observation and Applications in Atmospheric Remote Sensing

LI Zhengqiang1, XIE Yisong1, HONG Jin2, WANG Zhongting3, WANG Shupeng4,SUN Xiaobing2, QIAO Yanli2, GU Xingfa1   

  1. 1 State Environment Protection Key Laboratory of Satellite Remote Sensing, Aerospace Information Research Institute,
    Chinese Academy of Sciences, \quad Beijing~~ 100101, China;
    2 Key  Laboratory  of  Optical  Calibration  and  Characterization,
     Anhui  Institute  of  Optics  and  Fine  Mechanics,  Chinese  Academy  of  Sciences,  Hefei 230031, China;
    3 Satellite Environment Center, Ministry of Ecology and Environmental, \quad Beijing 100094, China;
    4 National Satellite Meteorological Center, China Meteorological Administration,  Beijing 100081, China
  • Online:2019-01-28 Published:2019-01-29

Abstract: Polarization that reflects the directional characteristics of electromagnetic wave, provides unique information of
electromagnetic wave other than intensity. In the interactions between electromagnetic wave and atmospheric particles,
polarimetry is able to effectively improve the abundance and accuracy of satellite remote sensing observation,
thanks to its high sensitivities to the physical properties of particles. And polarization can significantly
enhance the detection capability of the complicated atmospheric components, such as cloud and aerosol.
For the first time, four
types of polarimetric satellite sensor were introduced for earth observation,  including
directional polarimetric camera, push-broom polarimetric imager, whisk-broom polarimetric imager and multi-channel
polarimetric radiometer. The related and representative Chinese polarimetric sensors are listed, with their
characteristic parameters introduced and detection abilities analyzed. Then, typical calibration methods of
polarimetric satellite sensors are introduced, including pre-launch laboratory calibration, onboard calibration
and in-orbit calibration. Given the advantages of extra observing dimension and accuracy, high sensitivity to
particulate size and shape, and enhancement on retrieving weak atmospheric signal, polarimetric satellite
sensors have the abilities to obtain comprehensive and accurate aerosol and cloud parameters over the earth.
These spaceborne polarimetric sensors have broad application opportunities and enormous potentials in the
fields of atmospheric remote sensing, including monitoring atmospheric fine particulate matters PM2.5,
observation and retrieval of essential climate variables, monitoring and assessment of extreme environmental
events, evaluation of aerosol ecological effects and high-precision atmospheric correction for earth observation.

Key words: polarization, satellite sensor, atmospheric remote sensing, aerosol and cloud, calibration

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