{"@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         hydrogen in micrograms/g within the regolith of asteroid                4 Vesta is provided for two-degree equal-angle pixels.  Hydrogen        abundances were determined from epithermal neutron counting data        acquired by the NASA Dawn mission's Gamma Ray and Neutron Detector      (GRaND) while in low altitude mapping orbit, about 210 km from Vesta's  surface.  The abundances are representative of Vesta's bulk regolith    composition to depths of a few decimeters with a spatial resolution     of about 300-km full-width-at-half-maximum of arc length on the         surface.  The methods used to determine hydrogen abunance are           described by PRETTYMANETAL2012.", "identifier": "urn:nasa:pds:context_pds3:data_set:data_set.dawn-a-grand-5-vesta-hydrogen-map-v1.0_sju3-3t8g", "issued": "2018-06-26", "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", "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           \n                                     ABUNDANCE V1.0"}