Highly Resolved Topography and Illumination at Mercury's South Pole from MESSENGER MDIS NAC

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dc.contributor.authorBertone, Stefano
dc.contributor.authorMazarico, Erwan
dc.contributor.authorBarker, Michael K.
dc.contributor.authorSiegler, Matthew A.
dc.contributor.authorMartinez-Camacho, Jose M.
dc.contributor.authorHamill, Colin D.
dc.contributor.authorGlantzberg, Allison K.
dc.contributor.authorChabot, Nancy L.
dc.date.accessioned2023-03-02T19:01:30Z
dc.date.available2023-03-02T19:01:30Z
dc.date.issued2023-02-02
dc.description.abstractMercury’s south polar region is of particular interest since Arecibo radar measurements show many highreflectance regions consistent with ice deposits. However, current elevation information in Mercury’s southern hemisphere is not sufficient to perform detailed modeling of the illumination and thermal conditions at these radarbright locations and to constrain properties of the volatiles potentially residing there. In this work, we leverage previously existing elevation maps of Mercury’s surface from stereo-photogrammetry at 665 m pix⁻¹ , Mercury Dual Imaging System Narrow Angle Camera images, and Shape-from-Shading tools from the Ames Stereo Pipeline, to provide the first high-resolution topographic maps of the south pole with a resolution of 250 m pix⁻¹ poleward of 75°S. We show that the increased resolution and level of detail provided by our new elevation model allow for a more realistic recovery of illumination conditions in Mercury’s south polar region, thus opening the way to future thermal analyses and for the characterization of potential ice and volatile deposits. We compare both the old and new topographic models to the Mercury Dual Imaging System Narrow Angle Camera images to show the higher level of fidelity with our products, and we assess the improved consistency of derived permanently shadowed regions with reflectance measurements by Arecibo’s antennas.en_US
dc.description.sponsorshipS.B. acknowledges support by NASAs Planetary Science Division Research Program through the CRESST II cooperative agreement. S.B., E.M., and M.B. acknowledge support from the Planetary Geodesy Internal Scientist Funding Model work package funded by the NASA Planetary Science Division. The material is based upon work supported by NASA to S.B. under award No. 80GSFC21M0002. Support was provided by the NASA Discovery Data Analysis Program grant 80NSSC19K0881 to N.L.C. Resources supporting this work were provided by the NASA High-End Computing (HEC) Program through the NASA Center for Climate Simulation (NCCS) at Goddard Space Flight Center. Models and ancillary products resulting from this study will be available at the Planetary Geodesy Data Archive (https:// pgda.gsfc.nasa.gov/) and doi:10.5281/zenodo.7542689.en_US
dc.description.urihttps://iopscience.iop.org/article/10.3847/PSJ/acaddben_US
dc.format.extent12 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m2qs5m-ddb7
dc.identifier.citationBertone, Stefano, et al. "Highly Resolved Topography and Illumination at Mercury's South Pole from MESSENGER MDIS NAC" The Planetary Science Journal 4, no. 2 (02 Feb, 2023). https://doi.org/10.3847/PSJ/acaddb.en_US
dc.identifier.urihttps://doi.org/10.3847/PSJ/acaddb
dc.identifier.urihttp://hdl.handle.net/11603/26930
dc.language.isoen_USen_US
dc.publisherIOPen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Center for Space Sciences and Technology
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleHighly Resolved Topography and Illumination at Mercury's South Pole from MESSENGER MDIS NACen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0001-9885-8440en_US

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