PDS: The Planetary Atmospheres Node
MGS Radio Science Data
The reduced Electron Density dataset contains the entire collection of radio occultation occultation ionospheric electron density (EDS) profiles derived from Mars Global Surveyor (MGS) data during the MGS mission. The aareadme.txt file provides an introduction to the reduced data set while raw data are available online or by request.
Available Data
Raw Data (EDR) mors_0101 - mors_0156 - Mars Global Surveyor Radio Science Cruise Data. Volume mors_0156 available on-line. Request other volumes if required.
mors_0210 - mors_0359 - Mars Global Surveyor Radio Science Mars Orbit Insertion (MOI) Data. Volume mors_0210 available on-line. Request other volumes if required.
mors_0401 - mors_0584 - Mars Global Surveyor Radio Science Mapping Data. Volume mors_0410 available on-line. Request other volumes if required.
mors_0601 - mors_08xx - Mars Global Surveyor Radio Science Mapping Data. Volume mors_0610 available on-line. Request other volumes if required.
Reduced Data (RDR)
Individual volumes are available (mors_1001); however the data have been consolidated into a single volume. mors_1102.
Occultation Electron Density Files
This data set is comprised of data products, each derived from an individual ingress or egress occultation. Each product lists observing parameters and a table including pressure, temperature and electron density plus standard deviations as a function of radius (distance from the center of mass of the planet, or altitude).
open File Dialog The following index (xlsx, txt) can be used to select desired files. A more complete index is available.
The EDS directory contains 12 subdirectories with names of the form yyyy_ddd giving the year (yyyy) and day-of-year (ddd) of the first electron density file within. The subdirectory coverage does not overlap and there are often days or weeks between the last file in one directory and the first file in the next.
Additional Information
The Software Interface Specification (SIS) document provides a more detailed description of the data set while catalogue files in mors_1102 define the mission, spacecraft and instrument.
