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草业科学  2014 

天宫一号高光谱数据的积雪面积比例制图及雪粒径反演

DOI: 10.11829\j.issn.1001-0629.2013-0504, PP. 1407-1415

Keywords: 高光谱数据,积雪面积比例,雪粒径,稀疏回归,ART

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Abstract:

?天宫一号高光谱成像仪获取了高空间分辨率和高光谱分辨率的数据。本研究以黑河上游祁连山地区作为试验区,利用其获取的高光谱短波红外波段的数据(SWI)提取了积雪面积比例图和积雪粒径图,以检验其在民用方面的适用性。本研究开发了一个结合VCA(VertexComponentAnalysis)组分自动提取技术和稀疏回归解混方法的积雪面积比例制图算法并提取积雪面积比例图,利用同平台携带的更高空间分辨率的图像提取真值对反演结果进行验证。结果显示,两个验证区的均方根误差(RMSE)分别为0.24和0.27,相关系数分别为0.72和0.84,精度较高。利用考虑积雪粒子形状的ART辐射传输理论,获取模型中最佳积雪形状因子和反演波段,并利用SWI数据制作雪粒径图。研究结果表明,天宫一号高光谱数据在积雪遥感方面具有很好应用前景,可以为水文和气候模型提供需要的积雪因子。

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