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Asia-Oceania GEOSS: A GEO initiative to implement GEOSS for sustainable development in Asia-Oceania

  • role： First author第一作者
  • Affiliation：

    吉林大学 地球探测科学与技术学院，长春 130026

  • Email：1215433225@qq.com
  • Introduction：宋江涛，1993年生，女，硕士研究生，研究方向为遥感图像处理。E-mail：1215433225@qq.com
宋江涛,  
  • role： Corresponding author通信作者
  • Affiliation：

    吉林大学 地球探测科学与技术学院，长春 130026

  • Email：panj@jlu.edu.cn
  • Introduction：潘军，1971年生，男，副教授，研究方向为遥感与地理信息系统。E-mail：panj@jlu.edu.cn
潘军*,  
  • Affiliation：

    吉林大学 地球探测科学与技术学院，长春 130026

  • No information about the author is available
邢立新,  
  • Affiliation：

    吉林大学 地球探测科学与技术学院，长春 130026

  • No information about the author is available
蒋立军,  
  • Affiliation：

    吉林大学 地球探测科学与技术学院，长春 130026

  • No information about the author is available
孙也涵,  
  • Affiliation：

    吉林大学 地球探测科学与技术学院，长春 130026

  • No information about the author is available
张雪峰,  
  • Affiliation：

    吉林大学 地球探测科学与技术学院，长春 130026

  • No information about the author is available
仲伟敬,  
  • Affiliation：

    吉林大学 地球探测科学与技术学院，长春 130026

  • No information about the author is available
范博文

реферат

线性光谱混合模型是目前应用最广泛的光谱混合模型，但由于遥感观测多分辨率的特点，模型的适用性会受到尺度效应的影响。为探索该模型在不同观测尺度下的适用程度，本文从地物辐射原理出发，通过理论推导微面元辐射通量表达式，得出地物辐射通量除了与端元反射率和面积比有关外，也与天顶角存在显著的非线性关系。因此，在线性光谱混合模型和微面元辐射通量的基础上，推导了更具普适性的积分线性光谱混合模型的表达式，再采用数值模拟的方法，计算了两模型的相对差值Δρ，结果表明Δρ的大小仅与探测单元的半瞬时视场角β有关，并通过实测光谱实验对上述推论进行了验证。研究表明，当β<13°时，Δρ较小，线性光谱混合模型是积分线性光谱混合模型的一种近似表达形式，β完全可作为确定线性光谱混合模型适用观测尺度的关键依据，并且该模型的适用程度随β的增大而降低。

ключеви́че слова́

线性光谱混合模型;微面元;积分线性光谱;观测尺度;数值模拟;瞬时视场角

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