The Morphology of Craters on Mercury: Results from MESSENGER flybys ⇑ Olivier S
Icarus 219 (2012) 414–427 Contents lists available at SciVerse ScienceDirect Icarus journal homepage: www.elsevier.com/locate/icarus The morphology of craters on Mercury: Results from MESSENGER flybys ⇑ Olivier S. Barnouin a, , Maria T. Zuber b, David E. Smith b, Gregory A. Neumann c, Robert R. Herrick d, John E. Chappelow e, Scott L. Murchie a, Louise M. Prockter a a The Johns Hopkins University, Applied Physics Laboratory, Johns Hopkins Road, Laurel, MD 20723, USA b Dept. of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA 02139-4307, USA c NASA Goddard Space Flight Center, 8800 Greenbelt Road, Greenbelt, MD 20771, USA d Geophysical Institute, University of Alaska Fairbanks, 903 Koyukuk Dr., Fairbanks, AK 99775-7320, USA e SAGA Inc., 1148 Sundance Loop, Fairbanks, AK 99709, USA article info abstract Article history: Topographic data measured from the Mercury Laser Altimeter (MLA) and the Mercury Dual Imaging Received 29 November 2011 System (MDIS) aboard the MESSENGER spacecraft were used for investigations of the relationship Revised 21 February 2012 between depth and diameter for impact craters on Mercury. Results using data from the MESSENGER Accepted 23 February 2012 flybys of the innermost planet indicate that most of the craters measured with MLA are shallower than Available online 6 March 2012 those previously measured by using Mariner 10 images. MDIS images of these same MLA-measured cra- ters show that they have been modified. The use of shadow measurement techniques, which were found Keywords: to be accurate relative to the MLA results, indicate that both small bowl-shaped and large complex craters Mercury that are fresh possess depth-to-diameter ratios that are in good agreement with those measured from Impact processes Image proecessing Mariner 10 images.
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