Précédent|Prochain

Development and prospect of hyperspectral LiDAR for earth observation

  • role： First author第一作者
  • Affiliation：

    State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430072, China

  • Email：weigong@whu.edu.cn
  • Introduction：龚威,1970年生, 男, 教授, 研究方向为光学和激光遥感技术与应用。E-mail: weigong@whu.edu.cn
GONG Wei1,  
  • role： Corresponding author通信作者
  • Affiliation：

    State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430072, China

  • Email：shishuo@whu.edu.cn
  • Introduction：史硕,1988年生, 男, 副教授, 研究方向为新型对地激光雷达技术与应用。E-mail: shishuo@whu.edu.cn
SHI Shuo1*,  
  • Affiliation：

    State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430072, China

CHEN Biwu1,  
  • Affiliation：

    Innovation Academy for precision Mearsurement Science and Technology, Chinese Academy of Sciences, Wuhan 430072, China

SONG Shalei2,  
  • Affiliation：

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China

NIU Zheng3,  
  • Affiliation：

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China

WANG Cheng3,  
  • Affiliation：

    School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China

GUAN Haiyan4,  
  • Affiliation：

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China

LI Wei3,  
  • Affiliation：

    Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China

GAO Shuai3,  
  • Affiliation：

    School of Earth and Space Sciences, Peking University, Beijing 100871, China

LIN Yi5,  
  • Affiliation：

    School of Geography and Information Engineering, China University of Geosciences, Wuhan 430074, China

SUN Jia6,  
  • Affiliation：

    School of Geography and Information Engineering, China University of Geosciences, Wuhan 430074, China

YANG Jian6,  
  • Affiliation：

    School of Geography and Information Engineering, China University of Geosciences, Wuhan 430074, China

DU Lin6

résumé

In the development of earth observation technology, the integrated acquisition and application for high-resolution 3D-spectral information of targets is one of the frontier scientific issues. In order to achieve the integrated acquisition of geometric characteristics and spectral information for targets, a lot of exploration studies have been carried out at home and abroad based on the current active and passive remote sensing technology. Combining the technical advantages of hyperspectral imaging and lidar ranging, multispectral/hyperspectral lidar for earth observation came into being and has become an important direction for the future development of remote sensing.This article reviews the development of the hyperspectral lidar system for earth observation in three stages. In the initial exploration stage, the research mainly focused on dual-wavelength lidar, mainly using specific wavelength lasers for specific applications. Then, in the progressive development stage, multispectral lidar was proposed to achieve spectral information acquisition of multi-wavelengths, including prototype systems with multiple single-wavelength lasers and supercontinuum lasers. Finally, in the gradual development stage, hyperspectral lidar was developed to obtain spectral information by more wavelengths. Which can achieve wider spectrum coverage and higher spectral resolution in visible-near infrared bands.Subsequently, the exploratory research for data processing of hyperspectral lidar was expounded. It mainly involves two aspects: processing of full-waveform data in multi-bands; geometric correction and radiometric correction. In terms of full-waveform data processing, hyperspectral lidar has better capability of full-waveform decomposition for weak echo bands and low signal-to-noise bands. In terms of geometric correction, the asynchronization caused by full-waveform pulse echo in different bands needs to be solved. And radiometric correction should be mainly focused on the influence of distance, angle of incidence and roughness of the target.In addition, this paper analyzes the potential application of hyperspectral lidar in the field of surveying and mapping, agriculture and forestry. In the field of surveying and mapping, hyperspectral lidar can be widely used for classification of targets and land cover. In the field of agriculture and forestry, hyperspectral lidar can simultaneously obtain the spatial structure and spectral information of vegetation. Thus, it provides a new method for detecting the three-dimensional distribution of vegetation physiological and biochemical characteristics. Finally, we look forward to the challenges for the future development of hyperspectral lidar for earth observation. And the direction for future development is also putted forward: miniaturization, practicality and demonstration applications.

mots-clés

lidar;hyperspectral;spatial-spectral integration;all day and night;vegetation remote sensing

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