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		基于AVHRR影像的北半球积雪识别算法
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			Snow discrimination algorithm in the Northern Hemisphere based on AVHRR image
			 
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		 图7. Landsat-5 TM参考积雪范围影像与AVHRR积雪范围数据集对比  | 
	
Fig. 7. Comparison between Landsat-5 TM snow map and AVHRR snow cover extent datasets: China (a), North America (b), Eurasia (c), Siberia (d) and Arctic region (e)  | 
	
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