基于MODIS数据的额尔齐斯河上游河冰物候研究

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胡婉嫔¹^,²(

), 效存德¹^,³, 谢爱红¹, 沈永平¹, 雷华锦¹

Study on river ice phenology of upper Irtysh River with MODIS data

Wanpin HU¹^,²(

), Cunde XIAO¹^,³, Aihong XIE¹, Yongping SHEN¹, Huajin LEI¹

图4. 由MOD09GQ第二波段得到的额尔齐斯河布尔津至斋桑泊段河冰物候
注：第二波段波长为841~876 nm。灰色点为MOD09GQ原始反射率数据，红色线为TIMESAT中高斯拟合所得时间序列，蓝色线为S-G滤波所得时间序列

Fig.4. River ice phenology of Irtysh river from Burqin to Lake Zaysan section was obtained by MOD09GQ band 2
Note： Wavelength： 841~876 nm. The grey point is MOD09GQ original reflectance data， the red line is time series obtained by Gauss fitting in TIMESAT， and the blue line is time series obtained by S-G filtering