1. Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites, China Meteorological Administration, Beijing, P. R. China
2. National Satellites Meteorological Centre, China Meteorological Administration, Beijing, P. R. China
3. Faculty of Sciences, Department of Bioscience Engineering, University of Antwerp, Antwerp, Belgium
4. State Key Laboratory of Remote Sensing Science, Faculty of Geographical Science, Beijing Normal University, Beijing, P. R. China