1. a Center for Remote Sensing and Department of Geography, Boston University, 675 Commonwealth Avenue , 02215., Boston, MA, U.S.A.
2. d National Center for Atmospheric Research, PO Box 3000 , 80307-3000, Boulder, CO, U.S.A.
3. b Department of Geography, and Center for Remote Sensing and Environmental Optics, University of California , 93106, Santa Barbara, CA, U.S.A.
4. c Lawrence Livermore National Laboratory , 94550, Livermore, CA, U.S.A.