MURCHIE, Scott L.¹, ROBINSON, Mark S.², HEAD, James W.³, STROM, Robert G.⁴, PROCKTER, Louise⁵, SOLOMON, Sean C.⁶, WATTERS, Thomas R.⁷, BLEWETT, David T.¹, CHABOT, Nancy L.¹ and DENEVI, Brett W.⁸, (1)Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, (2)School of Earth and Space Exploration, Arizona State University, PO Box 871404, Tempe, AZ 85287-1404, (3)Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, (4)Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, (5)Applied Physics Lab, Planetary Exploration Group, MP3-E178, 11100 Johns Hopkins Road, Laurel, MD 20723, (6)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, (7)Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, Washington, DC 20560, (8)Johns Hopkins University Applied Physics Lab, Laurel, MD, scott.murchie@jhuapl.edu, scott.murchie@jhuapl.edu

HAUCK II, Steven A.¹, ZUBER, Maria T.², SMITH, David E.², JOHNSON, Catherine L.³, PHILLIPS, Roger J.⁴, LEMOINE, Frank G.⁵, MARGOT, Jean-Luc⁶, NEUMANN, Gregory A.⁵, PEALE, Stanton J.⁷ and SOLOMON, Sean C.⁸, (1)Department of Geological Sciences, Case Western Reserve University, 10900 Euclid Avenue, AW Smith 112, Cleveland, OH 44106-7216, (2)Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, (3)Department of Earth and Ocean Sciences, University of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4, Canada, (4)Planetary Science Directorate, Southwest Research Institute, 1050 Walnut St, Suite 300, Boulder, CO 80302, (5)Planetary Geodynamics Laboratory, NASA Goddard Space Flight Center, Mail Code 698, Greenbelt, MD 20771, (6)Department of Earth and Space Sciences, University of California, Los Angeles, 595 Charles Young Drive East, Los Angeles, CA 90095, (7)Department of Physics, University of California Santa Barbara, Broida Hall, Mail Code 9530, Santa Barbara, CA 93106, (8)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, hauck@case.edu, hauck@case.edu

NITTLER, Larry R.¹, WEIDER, Shoshana Z.¹, STARR, Richard D.², MCCOY, Timothy J.³, EBEL, Denton S.⁴, LAWRENCE, David J.⁵, MCNUTT Jr, Ralph⁵, SCHLEMM II, Charles E.⁵, SOLOMON, Sean C.⁶ and SPRAGUE, Ann L.⁷, (1)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd NW, Washington, DC 20015, (2)Physics Department, Catholic University of America, Washington, DC 20064, (3)National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, (4)Department of Earth and Planetary Sciences, American Museum of Natural History, Central Park West at 79th St, New York, NY 10024, (5)Space Department, Johns Hopkins Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, (6)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, (7)Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, lnittler@ciw.edu, lnittler@ciw.edu

EVANS, Larry G.¹, PEPLOWSKI, Patrick², HAUK II, Steven A.³, MCCOY, Timothy J.⁴, BOYNTON, William V.⁵, GOLDSTEN, John O.², HAMARA, Dave K.⁵, RHODES, Edgar A.², SPRAGUE, Ann L.⁵ and SOLOMON, Sean C.⁶, (1)NASA, Goddard Space Flight Center, Code 691/CSC, Greenbelt, MD 20771, (2)Johns Hopkins University, Applied Physics Laboratory, Laurel, MD 20723, (3)Department of Geological Sciences, Case Western Reserve University, 10900 Euclide Ave, Cleveland, OH 44106, (4)National Museum of Natural History, Smithsonian Institution, Washington, DC 20560, (5)Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, (6)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, Larry.G.Evans@nasa.gov, Larry.G.Evans@nasa.gov

EBEL, Denton S., Department of Earth and Planetary Sciences, American Museum of Natural History, Central Park West at 79th St, New York, NY 10024, ALEXANDER, Conel M. O'D., Department of Terrestrial Magnetism, Carnegie Institution of Washington, Washington, DC 20015, HAUCK II, Steven A., Department of Geological Sciences, Case Western Reserve University, 10900 Euclid Avenue, AW Smith 112, Cleveland, OH 44106-7216, LAWRENCE, David J., Space Department, Johns Hopkins Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, NITTLER, Larry R., Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd NW, Washington, DC 20015, PEPLOWSKI, Patrick, Johns Hopkins University, Applied Physics Laboratory, Laurel, MD 20723, SOLOMON, Sean C., Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, SPRAGUE, Ann L., Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, STARR, Richard D., Physics Department, Catholic University of America, Washington, DC 20064 and STEWART, Sarah T., Department of Earth and Planetary Sciences, Harvard University, 20 Oxford Street, Cambridge, MA 02138, Debel@amnh.org, Debel@amnh.org

FASSETT, Caleb I.¹, DENEVI, Brett W.², WHITTEN, Jennifer L.³, GOUDGE, Timothy A.³, BAKER, David M.H.⁴, HURWITZ, Debra M.⁴, OSTRACH, Lillian R.⁵, XIAO, Zhiyong⁶, BYRNE, Paul K.⁷ and KLIMCZAK, Christian⁸, (1)Department of Astronomy, Mount Holyoke College, South Hadley, MA 01075, (2)Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, (3)Department of Geological Sciences, Brown University, Providence, RI 02912, (4)Department of Geological Sciences, Brown University, 324 Brook Street, Box 1846, Providence, RI 02912, (5)School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85251, (6)Lunar and Planetary Laboratory, 1629 E. University Blvd, University of Arizona, Tucson, AZ 85721, (7)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, N.W, Washington, DC 20015, (8)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, cfassett@mtholyoke.edu, cfassett@mtholyoke.edu

BYRNE, Paul K.¹, KLIMCZAK, Christian², DENEVI, Brett W.³, WATTERS, Thomas R.⁴, SOLOMON, Sean C.², ENNS, Andrew⁵, HEAD, James W.⁶, HURWITZ, Debra M.⁷ and BAKER, David M.H.⁷, (1)Universities Space Research Association, Lunar and Planetary Institute, 3600 Bay Area Boulevard, Houston, TX 77058, (2)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, (3)Johns Hopkins University Applied Physics Lab, Laurel, MD, (4)Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, Washington, DC 20560, (5)School of Earth and Space Exploration, Arizona State University, PO Box 871404, Tempe, AZ 85287, (6)Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, (7)Department of Geological Sciences, Brown University, 324 Brook Street, Box 1846, Providence, RI 02912, byrne@lpi.usra.edu, byrne@lpi.usra.edu

ERNST, Carolyn M.¹, MURCHIE, Scott L.¹, BARNOUIN, Olivier S.², CHABOT, Nancy L.¹, HEAD, James W.³, PROCKTER, Louise², SOLOMON, Sean C.⁴ and WATTERS, Thomas R.⁵, (1)Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, (2)Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, (3)Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, (4)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, (5)Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, Washington, DC 20560, carolyn.ernst@jhuapl.edu, carolyn.ernst@jhuapl.edu

WATTERS, Thomas R.¹, SOLOMON, Sean C.², HEAD, James W.³, ERNST, Carolyn M.⁴, DENEVI, Brett W.⁵, ROBINSON, Mark S.⁶, KLIMCZAK, Christian² and GOUDGE, Timothy A.⁷, (1)Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, Washington, DC 20560, (2)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, (3)Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, (4)Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, (5)Johns Hopkins University Applied Physics Lab, Laurel, MD, (6)School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85251, (7)Department of Geological Sciences, Brown University, Providence, RI 02912, watterst@si.edu, watterst@si.edu

KLIMCZAK, Christian¹, WATTERS, Thomas R.², BYRNE, Paul K.³, ERNST, Carolyn M.⁴, SOLOMON, Sean C.¹, GOUDGE, Timothy A.⁵, HEAD, James W.⁶ and XIAO, Zhiyong⁷, (1)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, (2)Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, Washington, DC 20560, (3)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd NW, Washington, DC 20015, (4)Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, (5)Department of Geological Sciences, Brown University, Providence, RI 02912, (6)Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, (7)Lunar and Planetary Laboratory, 1629 E. University Blvd, University of Arizona, Tucson, AZ 85721, cklimczak@CIW.EDU, cklimczak@CIW.EDU

PROCKTER, Louise¹, BAKER, David M.H.², HEAD, James W.³, MURCHIE, Scott L.¹, ERNST, Carolyn M.¹, CHAPMAN, Clark R.⁴, DENEVI, Brett W.⁵, SOLOMON, Sean C.⁶, WATTERS, Thomas R.⁷ and MASSIRONI, Matteo⁸, (1)Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, (2)Department of Geological Sciences, Brown University, 324 Brook Street, Box 1846, Providence, RI 02912, (3)Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, (4)Southwest Research Institute, Suite 300, 1050 Walnut St, Boulder, CO 80302, (5)Johns Hopkins University Applied Physics Lab, Laurel, MD, (6)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, (7)Center for Earth and Planetary Studies, National Air and Space Museum, Smithsonian Institution, Washington, DC 20560, (8)Department of Geoscience, University of Padova, Padova, 35137, Italy, Louise.Prockter@jhuapl.edu, Louise.Prockter@jhuapl.edu

BAKER, David M.H., Department of Geological Sciences, Brown University, Box 1846, Providence, RI 02912, HEAD, James W., Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, PROCKTER, Louise, Applied Physics Laboratory, Johns Hopkins University, 11100 Johns Hopkins Road, Laurel, MD 20723 and SOLOMON, Sean C., Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, david_baker@brown.edu, david_baker@brown.edu

CHAPMAN, Clark R.¹, MERLINE, William J.¹, OSTRACH, Lillian R.², XIAO, Zhiyong³, SOLOMON, Sean C.⁴, HEAD, James W.⁵ and WHITTEN, Jennifer L.⁶, (1)Southwest Research Institute, Suite 300, 1050 Walnut St, Boulder, CO 80302, (2)School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85251, (3)Lunar and Planetary Laboratory, 1629 E. University Blvd, University of Arizona, Tucson, AZ 85721, (4)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, (5)Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, (6)Department of Geological Sciences, Brown University, Providence, RI 02912, cchapman@boulder.swri.edu, cchapman@boulder.swri.edu

OSTRACH, Lillian R.¹, CHAPMAN, Clark R.², FASSETT, Caleb I.³, HEAD, James W.⁴, MERLINE, William J.², ROBINSON, Mark S.¹, SOLOMON, Sean C.⁵, STROM, Robert G.⁶ and XIAO, Zhiyong⁷, (1)School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85251, (2)Southwest Research Institute, Suite 300, 1050 Walnut St, Boulder, CO 80302, (3)Department of Astronomy, Mount Holyoke College, South Hadley, MA 01075, (4)Department of Earth, Environmental and Planetary Sciences, Brown University, Providence, RI 02912, (5)Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Rd. NW, Washington, DC 20015, (6)Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, (7)Lunar and Planetary Laboratory, 1629 E. University Blvd, University of Arizona, Tucson, AZ 85721, lostrach@ser.asu.edu, lostrach@ser.asu.edu

KLIMA, Rachel L.¹, D'AMORE, Mario², DENEVI, Brett W.³, ERNST, Carolyn M.⁴, GILLIS-DAVIS, Jeffrey J.⁵, HELBERT, Jörn², IZENBERG, Noam R.⁶, PASHAI, Pegah⁷, STROM, Robert G.⁸ and VILAS, Faith⁹, (1)Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, (2)German Aerospace Center, Institute of Planetary Research, Berlin, D-12489, Germany, (3)Johns Hopkins University Applied Physics Lab, Laurel, MD, (4)Johns Hopkins University Applied Physics Laboratory, Laurel, MD 20723, (5)Hawaii Institute of Geophysics and Planetology, University of Hawaii, 1680 East West Rd, Honolulu, HI 96822, (6)Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Rd, Laurel, MD 20723, (7)University of maryland, College Park, 20742, (8)Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ 85721, (9)Planetary Science Institute, 1700 East Fort Lowell, Suite 106, Tucson, AZ 85719, Rachel.Klima@jhuapl.edu, Rachel.Klima@jhuapl.edu