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Neutral point separation method for polarized effect between land objects and atmosphere in polarization remote sensing

  • role： First author第一作者
  • Affiliation：

    School of Earth Science and Engineering, Hohai University, Nanjing 211100, China

  • Email：wutx@hhu.edu.cn
  • Introduction：吴太夏，1979年生，男，教授，研究方向为偏振光谱遥感、水资源环境遥感。E-mail：wutx@hhu.edu.cn
Taixia WU1,  
  • Affiliation：

    Beijing Key Laboratory of Spatial Information Integration and 3S Engineering Applications, School of Earth and Space Science, Peking University, Beijing 100871, China

    Institute of Remote Sensing and Digital Earth, Beijing 100101, China

Qingxi TONG23,  
  • Affiliation：

    Helsinki Universit, Helsinki, Finland 00014

Pellikka PETRI4,  
  • Affiliation：

    Institute of Space Optics, Xi’an Jiaotong Univeristy, Xi’an 710049, China

Chunmin ZHANG5,  
  • role： Corresponding author通信作者
  • Affiliation：

    Beijing Key Laboratory of Spatial Information Integration and 3S Engineering Applications, School of Earth and Space Science, Peking University, Beijing 100871, China

  • Email：lyan@pku.edu.cn
  • Introduction：晏磊，1956年生，男，教授，研究方向为偏振与无人机仿生遥感、高分辨率成像与遥感定标、仿生导航。E-mail：lyan@pku.edu.cn
Lei YAN2*

résumé

Presently, polarized remote sensing, along with numerous polarized remote sensors equipped for satellites emission in China, becomes a new growth point and research hot spot in the field of earth observation. The polarization information of land objects is a valuable source for remote sensing. However, land surface object polarization information received by the polarimeter is constantly submerged in the atmospheric polarization effect. Consequently, the primary goal is to find a means to eliminate or reduce the atmospheric polarization effects when using the polarization remote sensing for land surface detection. In this paper, we demonstrated the feasibility of the neutral point separation method for polarized effect between land objects and atmosphere in the polarization remote sensing through the regular polarization distribution of clear sky and nature of the atmospheric polarization neutral points. The polarized effect of the Babinet neutral point was obtained by calculating the atmospheric neutral points in ascending and descending radiations. We discussed the detailed technology of applying the neutral point for polarization remote sensing based on the basic method of using Babinet points for polarization earth observation from two aspects of aerial and satellite remote sensing. The results show that (1) the Babinet neutral point is suitable for the separation method of the polarized effect between land objects and atmosphere in the polarization remote sensing. (2) The aerial remote sensing detection at the Babinet neutral point can eliminate the atmospheric polarization to effectively highlight the polarized information. (3) The solar synchronous orbit, POLDER satellite remote sensing images, can also identify the polarization neutral area effectively. (4) These results are a type of method for reducing the atmospheric error source in the polarization remote sensing to the lowest possible value and then obtaining the polarized reflectance of land object maximized from this atmospheric window of the polarization remote sensing. This approach separates the atmospheric polarization coupling effect in the high-resolution quantitative remote sensing inversion. These research results are practically significant for the atmospheric correction and improvement of the quantification level of polarized remote sensing.

mots-clés

polarized light;remote sensing;atmosphere neutral point;mechanism;earth observation

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