This data set consists of calibrated, time-ordered, angle-resolved electron flux data from the Electron Reflectometer (ER) instrument on the Mars Global Surveyor (MGS) spacecraft. The primary data consist of time-series tables with descriptive headers. The data set also includes ancillary data (including geometry), documentation, and browse plots.

This data set consists of calibrated, time-ordered, angle-resolved electron flux data from the Electron Reflectometer (ER) instrument on the Mars Global Surveyor (MGS) spacecraft. The primary data consist of time-series tables with descriptive headers. The data set also includes ancillary data (including geometry), documentation, and browse plots.

This data set contains vector magnetic field data acquired by the Fluxgate section of the Magnetometer / Electron Reflectometer instrument aboard the Mars Global Surveyor (MGS) spacecraft. The data are provided at a variable time resolution depending on the telemetry rate available to the investigation for the time period beginning with Aerobraking Phase 1A (1997-09-12). The data in the dataset cover the entire premapping period (ends 1999-03-08).

This data set contains vector magnetic field data acquired by the Fluxgate section of the Magnetometer / Electron Reflectometer instrument aboard the Mars Global Surveyor (MGS) spacecraft. The data are provided at a variable time resolution depending on the telemetry rate available to the investigation for the time period beginning with the prime mission mapping (1999-03-08). The data in the dataset cover the entire mapping time period.

This data set contains vector magnetic field data acquired by the Fluxgate section of the Magnetometer / Electron Reflectometer instrument aboard the Mars Global Surveyor (MGS) spacecraft. The data are provided at a variable time resolution depending on the telemetry rate available to the investigation for the time period beginning with the prime mission mapping (1999-03-08). The data in the dataset cover the entire mapping time period.

This data set contains vector magnetic field data acquired by the Fluxgate section of the Magnetometer / Electron Reflectometer instrument aboard the Mars Global Surveyor (MGS) spacecraft. The data are provided at a variable time resolution depending on the telemetry rate available to the investigation for the time period beginning with Aerobraking Phase 1A (1997-09-12). The data in the dataset cover the entire premapping period (ends 1999-03-08).

This data set contains vector magnetic field data acquired by the Fluxgate section of the Magnetometer / Electron Reflectometer instrument aboard the Mars Global Surveyor (MGS) spacecraft. The data are provided at a variable time resolution depending on the telemetry rate available to the investigation for the time period beginning with Aerobraking Phase 1A (1997-09-12). The data in the dataset cover the entire premapping period (ends 1999-03-08).

This data set contains archival results from radio science investigations conducted during the Mars Global Surveyor (MGS) mission. Radio measurements were made using the MGS spacecraft and Earth-based stations of the NASA Deep Space Network (DSN). The data set includes high-resolution spherical harmonic models of Mars' gravity field generated by groups at the Jet Propulsion Laboratory and Goddard Space Flight Center, covariance matrices for some models, and maps for some models; these results were derived from raw radio tracking data. Also included are profiles of atmospheric temperature and pressure and ionospheric electron density, derived from phase measurements collected during radio occultations. The data set also includes analyses of transient surface echoes observed close to occultations during the first few years of MGS operations and a single set of power spectra acquired during a quasi-specular bistatic radar experiment in 2000. The atmospheric and surface investigations were conducted by Radio Science Team members at Stanford University. The data set also includes 93 line-of-sight acceleration profiles derived at JPL from radio tracking data collected near periapsis while Mars Global Surveyor was in its Science Phasing Orbit and below its nominal Mapping altitude of 400 km. The data were delivered to PDS in approximately chronological order at the rate of one CD-WO volume (typically 100 MB) every three months.

This data set contains archival results from radio science investigations conducted during the Mars Global Surveyor (MGS) mission. Radio measurements were made using the MGS spacecraft and Earth-based stations of the NASA Deep Space Network (DSN). The data set includes high-resolution spherical harmonic models of Mars' gravity field generated by groups at the Jet Propulsion Laboratory and Goddard Space Flight Center, covariance matrices for some models, and maps for some models; these results were derived from raw radio tracking data. Also included are profiles of atmospheric temperature and pressure and ionospheric electron density, derived from phase measurements collected during radio occultations. The data set also includes analyses of transient surface echoes observed close to occultations during the first few years of MGS operations. The atmospheric and surface investigations were conducted by Radio Science Team members at Stanford University. The data set also includes 93 line-of-sight acceleration profiles derived at JPL from radio tracking data collected near periapsis while Mars Global Surveyor was in its Science Phasing Orbit and below its nominal Mapping altitude of 400 km. The data were delivered to PDS in approximately chronological order at the rate of one CD-WO volume (typically 100 MB) every three months.

This data set contains archival raw, partially processed, and ancillary/supporting radio science data acquired during the Mapping (MAP) 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. A small number of surface scattering experiments were also conducted. 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 MAP phase extended from March 1999 through January 2001. Data were organized in approximately chronological order and delivered on a set of 184 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 were typically 8-16 ODR's per day depending on DSN schedules and observing geometry.