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Mars topography harmonics and geophysical implicationsThe paper describes an improved model of Martian global topography which has been obtained by fitting a sixteenth-degree harmonic series to occultation, radar, spectral, and photogrammetric measurements. Empirical elevation data based on photographic data are used to supplement the observations in areas without data. Values for the mean radius, the mean density, and the displacement of the center of the figure from the center of mass are presented. The reported geometric flattening is too great and the reported dynamic flattening is too small for Mars to be homogeneous and hydrostatic. Maps of the data distribution, global topography, and Bouguer gravity anomaly are interpreted in terms of a crustal thickness map which is consistent with gravity, topography, and recent preliminary Viking seismic results.
Document ID
19780061113
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Bills, B. G.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Ferrari, A. J.
(California Institute of Technology, Jet Propulsion Laboratory; California Institute of Technology, Pasadena Calif., United States)
Date Acquired
August 9, 2013
Publication Date
July 10, 1978
Publication Information
Publication: Journal of Geophysical Research
Volume: 83
Subject Category
Lunar And Planetary Exploration
Accession Number
78A45022
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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