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基于MODIS与HJ-1-B数据的雪盖率反演及其相关因子分析 被引量:7

SUB-PIXEL SNOW COVERAGE AND CORRELATION FACTORS ANALYSIS BASED ON MODIS AND HJ-1-B DATA
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摘要 随着空间信息技术的发展及社会经济对雪盖监测产品的需求,亚像元雪盖制图逐渐成为积雪监测研究的重点。以环境与减灾卫星(HJ-1-B)数据作为地面真值计算MODIS数据中每个像元的积雪覆盖率,并与归一化雪被指数(NDSI)建立回归模型,从亚像元尺度反演MODIS数据的积雪覆盖率。以青海省玉树州作为研究区,实验结果表明该算法反演的雪覆盖率平均绝对误差均在0.2以内,在可接受的误差范围之内,说明该算法具有较强的稳定性和实用性。此外,在积雪覆盖率反演基础上,提出了与积雪覆盖率相关的另外两个相关因子:地表温度(LST)和植被指数(NDSI),分析表明:这两个因子与积雪覆盖率均存在明显的负相关关系,为基于多因子的雪盖率反演奠定了基础。 Using HJ-1-B 30-m observation as "ground truth" to calculate the percentage of snow cover for MODIS 480-m cells,this paper present an algorithm for MODIS data to obtain sub-pixel snow cover information based on a regression relationship between MODIS 480-m NDSI observation and fractional snow cover.The application of this method is tested in three regions located in Yushu,Qinghai province.The overall results indicate that the relationship between fractional snow cover and NDSI is reasonably robust with a me...
出处 《长江流域资源与环境》 CAS CSSCI CSCD 北大核心 2010年第5期566-571,共6页 Resources and Environment in the Yangtze Basin
基金 863项目高效能机载SAR系统减灾救灾应用示范(2007AA120306) 863项目多源遥感数据分析与减灾救灾应用示范(2007AA120205) 中美国际合作(2007DFA20640)
关键词 雪覆盖率 雪被指数 地表温度 植被指数 MODIS HJ-1-B snow coverage normalized difference snow index(NDSI) land surface temperature(LST) normalized difference vegetation index(NDVI) MODIS HJ-1-B
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参考文献11

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二级参考文献38

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