MODISfont-family,宋体,mso-bidi-font-family,宋体,mso-font-kerning,1.0pt,mso-ansi-language,EN-US,mso-fareast-language,ZH-CN,')",href="#">mso-bidi-language,AR-SA">,TM影像')",href="#">TM影像,积雪覆盖率,标准模型,分段模型,青藏高原, Open Access Library" />

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MODIS逐日积雪覆盖率产品验证及算法重建

, PP. 808-814

Keywords: font-family,宋体,mso-bidi-font-family,宋体,mso-font-kerning,1.0pt,mso-ansi-language,EN-US,mso-fareast-language,ZH-CN,MODISmso-bidi-language,MODISfont-family&searchField=keyword">AR-SA">MODISfont-family,宋体,mso-bidi-font-family,宋体,mso-font-kerning,1.0pt,mso-ansi-language,EN-US,mso-fareast-language,ZH-CN,')",mso-bidi-language&searchField=keyword">href="#">mso-bidi-language,&searchField=keyword">AR-SA">,TM影像')",TM影像&searchField=keyword">href="#">TM影像,积雪覆盖率,标准模型,分段模型,青藏高原

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Abstract:

选取青藏高原局部地区为研究对象,针对MODIS逐日积雪覆盖率产品(MOD10A1)存在精度差、地域限制等问题,利用MODIS地表反射率产品(MOD09GA),提出了分段建模的方法,生成了精度更高的积雪覆盖率产品,并采用Landsat资料对该产品进行了验证。结果表明①MOD10A1标准积雪覆盖率产品在青藏高原地区精度较低,提取的平均雪盖率为29.16%,与同时相TM影像的积雪覆盖比例(22.45%)相差较大,两者相关系数仅为0.74;②利用MOD09GA地表反射率产品重建积雪覆盖率的分段模型,提取的平均雪盖率为21.70%,与同时相TM影像的积雪覆盖比例较为接近,且两者相关系数达到0.85;③与TM资料生成的积雪真值图像对比,改进后的分段模型标准误差与绝对平均误差都优于标准产品,对研究区积雪覆盖面积监测精度的提高有一定的改善。

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