سابِق|تال

Retrieval of the mineral abundance and particle size distribution at the landing site of Yutu rover with hyperspectral remote sensing data

  • role： First author第一作者
  • Affiliation：

    Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China

    University of Chinese Academy of Sciences, Beijing 100049, China

  • Email：linhoml@163.com
  • Introduction：林红磊，1992年生，男，博士研究生，研究方向为高光谱遥感。E-mail：linhoml@163.com
LIN Honglei12,  
  • role： Corresponding author通信作者
  • Affiliation：

    Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China

  • Email：zhangxia@radi.ac.cn
  • Introduction：张霞，1972年生，女，研究员，研究方向为光谱响应机理、图像处理与信息提取、深空探测。E-mail：zhangxia@radi.ac.cn
ZHANG Xia1*,  
  • Affiliation：

    Planetary Science Institute, China University of Geosciences, Wuhan 430074, China

YANG Yazhou3,  
  • Affiliation：

    University of Chinese Academy of Sciences, Beijing 100049, China

    Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China

GUO Dijun24,  
  • Affiliation：

    Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China

    University of Chinese Academy of Sciences, Beijing 100049, China

WU Xing12,  
  • Affiliation：

    Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China

    University of Chinese Academy of Sciences, Beijing 100049, China

QI Wenchao12

ملخص

A fundamental subject in planetary exploration and sciences is the determination of mineral abundance and size distribution from visible/near-infrared spectra. Such knowledge can help better understand what geologic processes have been active on the lunar and planetary surface. The imaging spectrometer carried by the Yutu rover of the Chang’E-3 mission measured the reflectance spectra of lunar soil at a height of approximately 1 m, providing a new insight for understanding lunar surface. A new method was proposed to retrieve mineral abundance and particle size distribution and apply the results to Yutu rover in situ measurement. A methodology combining Hapke radiative transfer model and sparse unmixing algorithm was proposed in this study to retrieve mineral abundance and particle size distribution. The imaginary part of the refractive index of each endmember was first calculated by solving the Hapke model. The single-scattering albedos of each endmember with different particle sizes were obtained based on the Hapke slab model, and then the endmember library was constructed. Finally, the single-scattering albedo of the mineral mixture, which was computed using Hapke bidirectional equation, was unmixed using sparse unmixing algorithm with the aid of the endmember library. Laboratory measurements collected from the Reflectance Experiment Laboratory were used to validate the methodology. Results showed that the methodology has good performance in retrieving the abundance and particle size from mineral mixtures. Finally, the methodology was applied to Yutu rover measurement. The values of average abundance of pyroxene, olivine, plagioclase, agglutinit, and ilmenite at four observation points were 28.1%, 4.5%, 39%, 28%, and 0.4%, respectively. The average particle sizes of pyroxene, olivine, plagioclase, and fused glass were 166.02, 8.34, 196.31, and 44.21 μm, respectively, possibly indicating the different response of each component to space weathering in this site.

مفهوم

radiative transfer model;sparse unmixing;abundance;particle size distribution;Yutu rover;lunar

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