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

doi:10.11834/jrs.20198244

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Asia-Oceania GEOSS: A GEO initiative to implement GEOSS for sustainable development in Asia-Oceania
Vol. 23, Issue 2, Pages: 272-279(2019)
Published： 2019-3 ，

Accepted： 5 September 2018
DOI： 10.11834/jrs.20198244

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宋江涛, 潘军, 邢立新, 蒋立军, 孙也涵, 张雪峰, 仲伟敬, 范博文. 2019. 线性光谱混合模型的适用观测尺度分析. 遥感学报, 23(2): 272–279

Song J T, Pan J, Xing L X, Jiang L J, Sun Y H, Zhang X F, Zhong W J and Fan B W. 2019. Asia-Oceania GEOSS: A GEO initiative to implement GEOSS for sustainable development in Asia-Oceania. Journal of Remote Sensing, 23(2): 272–279
宋江涛, 潘军, 邢立新, 蒋立军, 孙也涵, 张雪峰, 仲伟敬, 范博文. 2019. 线性光谱混合模型的适用观测尺度分析. 遥感学报, 23(2): 272–279 DOI： 10.11834/jrs.20198244.

Song J T, Pan J, Xing L X, Jiang L J, Sun Y H, Zhang X F, Zhong W J and Fan B W. 2019. Asia-Oceania GEOSS: A GEO initiative to implement GEOSS for sustainable development in Asia-Oceania. Journal of Remote Sensing, 23(2): 272–279 DOI： 10.11834/jrs.20198244.

摘要

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Δ

，结果表明Δ

的大小仅与探测单元的半瞬时视场角

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

13°时，Δ

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，

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

的增大而降低。

Abstract

关键词

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

Keywords

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