{"@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                     concentration of hydrogen within the regolith of asteroid 1 Ceres       on twenty-degree quasi-equal-area pixels is provided. Hydrogen          concentrations were determined from thermal+epithermal neutron          counting data acquired by the NASA Dawn mission's Gamma Ray and Neutron Detector (GRaND) while in low altitude mapping orbit, about 385 km from Ceres' surface (about 0.8 body radii altitude).  The concentrations are representative of Ceres's bulk  regolith to depths up to a few          decimeters with a spatial resolution of about 600-km                    full-width-at-half-maximum of arc length on the surface. The methods    used to determine hydrogen concentration are described by               PRETTYMANETAL2017.", "identifier": "urn:nasa:pds:context_pds3:data_set:data_set.dawn-a-grand-5-ceres-hydrogen-map_v1.0_24vs-mivw", "issued": "2018-06-26", "keyword": ["1-ceres", "dawn-mission-to-vesta-and-ceres"], "landingPage": "https://pds.nasa.gov/ds-view/pds/viewDataset.jsp?dsid=DAWN-A-GRAND-5-CERES-HYDROGEN-MAP_V1.0", "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 CERES                    \n                                      HYDROGEN MAP V1.0"}