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A review of the development of remote sensing field experiments and product validation in China

  • role： First author第一作者
  • Affiliation：

    State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China

    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

  • Email：wenjg@aircas.ac.cn
  • Introduction：闻建光，研究方向为定量遥感。E-mail： wenjg@aircas.ac.cn
WEN Jianguang110,  
  • Affiliation：

    State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China

    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

LIU Qinhuo110,  
  • Affiliation：

    Research Institute of Forest Resource Information Techniques, Chinese Academy of Foresty, Beijing 100091, China

LI Zengyuan2,  
  • Affiliation：

    National Tibetan Plateau Data Center, Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing 100101, China

    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

LI Xin310,  
  • Affiliation：

    State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China

LIU Shaomin4,  
  • Affiliation：

    State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China

    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

XIAO Qing110,  
  • Affiliation：

    Research Institute of Forest Resource Information Techniques, Chinese Academy of Foresty, Beijing 100091, China

GAO Zhihai2,  
  • Affiliation：

    Chongqing Jinfo Mountain Karst Ecosystem National Observation and Research Station, School of Geographical Sciences, Southwest University, Chongqing 400715, China

MA Mingguo5,  
  • Affiliation：

    Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China

    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

CHE Tao610,  
  • Affiliation：

    State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China

    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

LIU Liangyun110,  
  • Affiliation：

    Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

FANG Hongliang710,  
  • Affiliation：

    State Key Laboratory of Earth Surface Processes and Resource Ecology, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China

YAN Guangjian4,  
  • Affiliation：

    Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

GE Yong710,  
  • Affiliation：

    Research Institute of Forest Resource Information Techniques, Chinese Academy of Foresty, Beijing 100091, China

CHEN Erxue2,  
  • Affiliation：

    National Satellite Meteorological Centre, China Meteorological Administration, Beijing 100081,China

ZHANG Yong8,  
  • Affiliation：

    State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China

    College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China

MA Linling110,  
  • Affiliation：

    College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China

WU Xiaodan9,  
  • Affiliation：

    State Key Laboratory of Remote Sensing Science, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100101, China

CHEN Xi1

résumé

Remote sensing experiments and products validation have always played an important role in the development of remote sensing science and technology. As an important way of understanding the natural characteristics, remote sensing experiments have played an important role in remote sensing science and technology research. Remote sensing product validation is crucial to ensuring the high accuracy of remote sensing algorithms and improving the quality of remote sensing products. Remote sensing experiments are the basis of validation because the ground truth, which is derived from field experiments, is the core of the validation. However, obtaining the ground truth is a complex systematic process, including optimized sampling, field observation, scale transformation, and validation. Thus, reducing the error of each process is important in obtaining high-quality ground truth.On April 6, 2022, China held the “First Forum on Remote Sensing Field Experiments and Products Validation” where intense exchanges and discussions on the key topics occurred, including remote sensing experiments and validation theory and technology, ground field observation and uncertainty, validation practice and platform, and the future development of remote sensing experiments and validation. More than 1000 scholars and students from different domestic scientific research institutes and universities attended the event.On the basis of reviewing the main progress in the field of remote sensing experiments and validation in China, thus paper summarizes the opinions and suggestions of the Chinese scientists who attended the meeting and expounds on the problems and challenges faced by China in terms of remote sensing field experiments and products validation. The development process of remote sensing experiments and products validation in China has three main development stages, namely, the remote sensing application experiment stage from the year of 1978, the quantitative remote sensing mechanism experiment stage from the year of 1994, and the comprehensive experiment stage of the quantitative remote sensing mechanism and validation. Significant progress has been made in experimental technology, validation technology, national specifications of product validation, and the validation system platform.Five related topics of remote sensing experiments and product validation have been discussed by 80 scientists, namely, the theoretical framework and basic theory of remote sensing product validation, ground observation and standardized data processing, land surface heterogeneity and scale transformation, product validation and evaluation, and system platform and data sharing.It should be considered systematically from the entire link key process of obtaining ground truth for remote sensing experiment and validation to truly become an important basis in ensuring the quality of satellite remote sensing products. Finally, the prospect of remote sensing experiment and validation in China is discussed. Remote sensing experiment and validation should be implemented from the joint efforts of national and even global scientific researchers to achieve global implementation through international cooperation and improve the ability of remote sensing experiments and product validation.

mots-clés

remote sensing experiment;product validation;optimize sampling;scale transformation;ground truth

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