基于AVHRR影像的北半球积雪识别算法

王京达, 郝晓华, 和栋材, 王建, 李弘毅, 赵琴

Snow discrimination algorithm in the Northern Hemisphere based on AVHRR image

Jingda WANG, Xiaohua HAO, Dongcai HE, Jian WANG, Hongyi LI, Qin ZHAO

表4 北半球积雪识别算法最优阈值选取

Table 4 Selection of optimal threshold for snow discriminant algorithm in the Northern Hemisphere

积雪分类 一级指标 二级指标 三级指标 Ref1 BT11/K DEM/m Ref3/Ref2 NDVI Ref3-Ref2 NDSI 雪1 >0.14 <280.0 <1 300 <0.32 <-0.11 >0.14 <281.5 ≥1 300 <0.32 <-0.11 雪2 >0.14 <280.0 <1 300 <0.32 <-0.96 >0.14 <281.5 ≥1 300 <0.32 <-0.96 雪3 >0.14 <280.0 <1 300 <0.32 ≥-0.11 ≥-0.96 ≥0.76 >0.14 <281.5 ≥1 300 <0.32 ≥-0.11 ≥-0.96 ≥0.76