{"@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": "This data set contains archival raw, partially processed, and      ancillary/supporting radio science data acquired during the Mars   Orbit Insertion (MOI) phase of the Mars Global Surveyor (MGS)      mission.  The radio observations were carried out using the MGS    spacecraft and Earth-based receiving stations of the NASA Deep     Space Network (DSN).  The observations were designed to test       the spacecraft radio system, the DSN ground system, and MGS        operations procedures; to be used in generating high-resolution    gravity field models of Mars; and for estimating density and       structure of the Mars atmosphere.  Of most interest are likely     to be the Orbit Data File and Original Data Record files, in       the ODF and ODR directories, respectively, which provided the      raw input to gravity and atmospheric investigations.  The MOI      phase extended from September 1997 to March 1999.  On orbits       203-266 and 343-571 (approximately April and June-September        1998, respectively) the spacecraft periapsis was especially low    giving the highest per-orbit sensitivity to gravity anomalies      during the entire mission.  Data were organized in approximately   chronological order and delivered on a set of 159 CD volumes at    the rate of 2-3 CD's per week.  Typical volume of a one-day ODF    was 300-400 kB.  Typical volume of an ODR was 5-10 MB, and there   could be multiple ODR's per day depending on DSN schedules and     observing geometry.", "identifier": "urn:nasa:pds:context_pds3:data_set:data_set.mgs-m-rss-1-moi-v1.0_dih5-c563", "issued": "2021-05-21", "keyword": ["mars", "mars-global-surveyor"], "landingPage": "https://pds.nasa.gov/ds-view/pds/viewDataset.jsp?dsid=MGS-M-RSS-1-MOI-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": "MARS GLOBAL SURVEYOR RAW         \n                                      DATA SET - MOI V1.0"}