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卫星雪盖信息的准确提取受到很多因素的影响,本文选用11幅玛纳斯河流域Landsat ETM+影像,应用归一化差值积雪指数NDSI区分积雪与其他地物,分析传感器增益、大气因素、地形效应对雪盖信息提取造成影响的原因,并定量计算各因素影响程度的大小。研究结果表明,成像过程传感器高低增益对卫星雪盖信息提取的影响非常大,大气因素的影响相对较小,NDSI对地形不具有适应性,尤其在阴影区进行积雪判读不适用。 更多还原

【Abstract】 The accuracy of satellite-derived snow cover information is affected by many factors.In this paper,we extracted snow cover information from Landsat ETM+ scenes of Manas river basin using a normalized difference snow index(NDSI) and then analyzed its effect factors.Experiments showed that sensor’s low-gain mode or high-gain mode has a great influence on the results of extraction of snow cover information.In addition,the atmospheric factors have minor impact on the results.NDSI does not have the a... 更多还原