{"@type": "dcat:Dataset", "accessLevel": "public", "accrualPeriodicity": "irregular", "bureauCode": ["026:00"], "contactPoint": {"@type": "vcard:Contact", "fn": "Thomas Morgan", "hasEmail": "mailto:thomas.h.morgan@nasa.gov"}, "description": "A global map of the abundance of\nhydrogen in micrograms/g within the regolith of asteroid\n4 Vesta is provided for two-degree equal-angle pixels.  Hydrogen\nabundances were determined from epithermal neutron counting data\nacquired by the NASA Dawn mission's Gamma Ray and Neutron Detector\n(GRaND) while in low altitude mapping orbit, about 210 km from Vesta's\nsurface.  The abundances are representative of Vesta's bulk regolith\ncomposition to depths of a few decimeters with a spatial resolution\nof about 300-km full-width-at-half-maximum of arc length on the\nsurface.  The methods used to determine hydrogen abunance are\ndescribed by PRETTYMANETAL2012.", "identifier": "urn:nasa:pds:context_pds3:data_set:data_set.dawn-a-grand-5-vesta-hydrogen-map-v1.0_nj2r-r8jf", "issued": "2021-05-21", "keyword": ["4-vesta", "dawn-mission-to-vesta-and-ceres"], "landingPage": "https://pds.nasa.gov/ds-view/pds/viewDataset.jsp?dsid=DAWN-A-GRAND-5-VESTA-HYDROGEN-MAP-V1.0", "license": "http://www.usa.gov/publicdomain/label/1.0/", "modified": "2025-07-17", "programCode": ["026:005"], "publisher": {"@type": "org:Organization", "name": "National Aeronautics and Space Administration"}, "references": ["https://pds.nasa.gov"], "theme": ["Earth Science"], "title": "DAWN GRAND MAP VESTA HYDROGEN ABUNDANCE\n                                      V1.0"}