TY  - Data
T1  - Heihe River eco hydrological remote sensing experiment: Heihe River Basin snow area proportion data set
A1  - Xiaohua Hao 
A1  - HUANG Xiaodong
A1  - Li xin
DO  - 10.12072/ncdc.nieer.db3523.2023
PY  - 2021
DA  - 2021-08-31
PB  - National Cryosphere Desert Data Center
AB  - The snow area proportion data set of Heihe River basin provides a time series product of snow area proportion on cloudless days from 2010 to 2012. The data uses satellite MODIS data with high temporal resolution (1 day) and spatial resolution (500m). Firstly, the automatic algorithm N-FINDR is used to select the end elements. On the basis of automatic extraction, six types of end elements including snow, vegetation, cloud, soil, rock and water are selected manually, and the spectral database is established according to the 2009 images; Based on the spectral database, the fully constrained linear unmixing method (FCLs) is used for sub-pixel decomposition to obtain the primary snow area proportion product; Finally, the cloud free products of MODIS daily snow area ratio are obtained by using the difference cloud removal algorithm Verified by using high-resolution image Landsat TM, it has higher accuracy than the existing MODIS Snow area proportion product (mod10a1). It can provide more accurate snow parameter input for hydrology and meteorology of the basinData Description: 0-100 snow area proportion, 0 Non snow;Projection type: longitude and latitude projection, WGS-84 datumSpatial resolution: 0.005 degreesTime resolution: 1 day
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/25509c26-4912-4e2e-a44b-1539138ef22d
ER  -