“normalized difference snow index”的概念、定义、翻译、参考文献-科学参考

单词	normalized difference snow index
释义	normalized difference snow index Encyclopedia 农学归一化差值积雪指数释 normalized difference snow index归一化差值积雪指数以可见光（visible; VIS）波段和短波红外（short-wave infrared; SWIR）波段的归一化差值来描述单个像元中积雪覆盖的程度。简称归一化积雪指数，是与像素中积雪的存在有关的指数。
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