Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8143529 | Planetary and Space Science | 2014 | 10 Pages |
Abstract
We derive models for the global shape and topography of Mercury from limb images obtained by the MESSENGER spacecraft during flybys and from orbit. Crossover heights of 225 individual limb profiles were adjusted by least-squares techniques to establish a rigid global topographic network. Mercury is confirmed to possess an equatorial ellipticity and a polar oblateness. Several large impact basins and craters can be identified in the topographic model, including one basin that was earlier proposed but unconfirmed. Comparisons with absolute height data from laser altimetry indicate that the limb model appears to overestimate planetary radius by ~900Â m on average. Limb profiles and local digital terrain models derived from stereo-photogrammetry show good agreement.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geophysics
Authors
Stephan Elgner, Alexander Stark, Jürgen Oberst, Mark E. Perry, Maria T. Zuber, Mark S. Robinson, Sean C. Solomon,