High-Resolution Regional Digital Elevation Models and Derived Products from MESSENGER MDIS Images
2022
Madeleine R. Manheim | Megan R. Henriksen | Mark S. Robinson | Hannah R. Kerner | Bradley A. Karas | Kris J. Becker | Matthew Chojnacki | Sarah S. Sutton | David T. Blewett
The Mercury Dual Imaging System (MDIS) on the Mercury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft has provided global images of Mercury&rsquo:s surface. A subset of off-nadir observations acquired at different times resulted in near-global stereo coverage and enabled the creation of local area digital elevation models (DEMs). We derived fifty-seven DEMs covering nine sites of scientific interest and tied each to a geodetic reference derived from Mercury Laser Altimeter (MLA) profiles. DEMs created as part of this study have pixel scales ranging from 78 m/px to 500 m/px, and have vertical precisions less than the DEM pixel scale. These DEMs allow detailed characterizations of key Mercurian features. We present a preliminary examination of small features called &ldquo:hollows&rdquo: in three DEM sites. Depth measurements from the new DEMs are consistent with previous shadow and stereo measurements.
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