1. Thayer School of Engineering, Dartmouth College, Hanover, NH, USA.
2. School of Earth and Space Exploration, Arizona State University, Pheonix, AZ, USA.
3. Applied Physics Laboratory, John Hopkins University, Laurel, MD, USA.
4. Department of Astronomy, Cornell University, Ithaca, NY, USA.
5. Scripps Institution of Oceanography, La Jolla, CA, USA.
6. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, USA.
7. Department of Geology and Geophysics, Louisiung State University, Baton Rouge, LA, USA.