Viking Orbiter and Mariner 9 Occultation, Gravity and Topography Data

These data are maintained at the Geosciences Node but have not been formally archived with PDS. The data files do not have PDS labels. Please use this data set with caution. 

PDS restores old data sets like this one, which was created before PDS existed, based on user demand and availability of resources. Meanwhile we make the data available to those who are willing to accept the risks of using data of uncertain quality.

Data Sets On-Line

• Gravity and Topography Data. Look at the README file for a description of the data files.
• Images of the Gravity and Topography Data Products

Other Resources

• Viking Mission Information at NSSDC
• Viking Mission Information from the PDS Catalog
• Mariner 9 Mission Information at NSSDC
• Mariner 9 Mission Information from the PDS Catalog

Note to Users

The Martian gravity models are cumulative. They are revised when more gravity data become available from each new mission. The models created from Viking and Mariner data have long since been revised with data from the Mars Global Surveyor and Mars Reconnaissance Orbiter. Please refer to the MGS Radio Science and MRO Radio Science data sets.

The MGS Mars Orbiter Laser Altimeter (MOLA) topography data sets are more recent than the Viking and Mariner topography data listed here. Please see the MOLA data set page.