Evaluation and Uncertainty Analysis of SMAP, SMOS and AMSR2 soil moisture products using distributed ground observation network in the cold and arid regions in the Northwest of China

Zengyan Wang1, Tao Che2 and Liyun Dai2, (1)Henan University, the College of Environment and Planning, Kaifeng, China, (2)Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China