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
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.