1. Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20742, USA.
2. NASA Headquarters, Washington, DC 20546, USA.
3. Jet Propulsion Laboratory, Mail Stop 300-235, 4800 Oak Grove Drive, Pasadena, CA 91109, USA.
4. Naval Research Laboratory, Washington, DC 20375, USA.
5. Remote Sensing Laboratory, University of Kansas, Lawrence, KS 66045, USA.