全球必威体育精装版关于NASA L波段主被动卫星SMAP土壤水分产品表现评估.pdf

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, VOL. 54, NO. 8, AUGUST 2016 4929 A Preliminary Evaluation of the SMAP Radiometer Soil Moisture Product Over United States and Europe Using Ground-Based Measurements Jiangyuan Zeng, Member, IEEE , Kun-Shan Chen, Fellow, IEEE, Haiyun Bi, and Quan Chen Abstract—The Soil Moisture Active Passive (SMAP) mission, I. INTRODUCTION which is the newest L-band satellite that is specifically designed for soil moisture monitoring, was launched on January 31, 2015. OIL moisture plays a significant role in numerous A beta quality version of the SMAP radiometer soil moisture Shydrological-related processes [1]–[3]. A good knowledge product was recently released to the public. It is crucial to evaluate of the spatiotemporal dynamic of soil moisture proves particu- the reliability of this product before it can be routinely used in larly important in various environmental applications, such as hydrometeorological studies at a global scale. In this paper, we carried out a preliminary evaluation of the SMAP radiometer weather and climate forecasting, agricultural productivity pre- soil moisture product against in situ measurements collected from dictions, flood monitoring, and drought early warning [4]–[6]. three networks that cover different climatic and land surface For this reason, soil moisture has been officially recognized as conditions, including two dense networks established in the U.S. an Essential Climate Variable (ECV) by the Global Climate and Finland, and one sparse network set up in Romania. Results Observing System (GCOS) [7], [8]. Ground measurement