1. Department of Civil and Environmental Engineering, University of California--Berkeley, Berkeley, CA, USA
2. European Organization for the Exploitation of Meteorological Satellites, Darmstadt, Germany
3. Department of Geography and the Earth and Environmental Systems Institute, The Pennsylvania State University, University Park, PA, USA
4. Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI, USA
5. Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, USA