旱区大气水汽含量遥感反演算法研究Research on remote sensing retrieval of atmospheric water vapor content in arid region
杨亮彦,孔金玲,王雅婷,李健锋,张文博
摘要(Abstract):
针对旱区大气水汽含量难以获取,且精度不高的问题,该文利用Landsat8两个热红外波段,基于SWCVR算法构建旱区大气水汽含量反演模型。与气象站实测数据进行验证,其均方根误差为0.31 g/cm~2,绝对误差为0.25 g/cm~2;与MOD05水汽产品对比发现,两者水汽的平均值分别为2.63和2.37 g/cm~2,且空间分布基本一致,但空间分辨率和成像时间的不同,导致存在一定差异性。结果表明,针对Landsat8热红外遥感数据,30×30的窗口大小最优,既保留了中高空间分辨率的优点,又获得了具有实用价值的精度;基于SWCVR算法的大气水汽含量反演方法在风沙滩地区具有较好的应用。
关键词(KeyWords): 大气水汽含量;Landsat8;SWCVR;旱区
基金项目(Foundation): 国家自然科学基金项目(41272246)
作者(Author): 杨亮彦,孔金玲,王雅婷,李健锋,张文博
DOI: 10.16251/j.cnki.1009-2307.2020.05.014
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