Authors | Abstract |
David Sandwell Scripps Institution of Oceanography Ross Beyer NASA Ames Research Center Ekaterina Tymofyeyeva Scripps Institution of Oceanography Catherine Johnson University of British Columbia, Vancouver Stafford Marquardt Google Earth Jenifer Austin Google Earth Kurt Schwehr Google Earth |
Much of our understanding
of the geodynamics and geology of Venus has been
derived from radar imagery and topography from the
Magellan mission (NASA 1989-1994; Saunders and
Pettengill, 1991).
These data were archived at the Planetary Data
System (PDS) and are easily and freely available. Unfortunately,
the Magellan Venus data are far less accessible to the
non-specialist than those of the Earth, Mars, and the
Moon. Data for these latter bodies are available via
the Google Earth geobrowser, allowing anyone to easily
explore the latest imagery and surface information. In
an effort to promote public interest in Venus, we have
created content for Google Earth that displays three
types of information from the Magellan-era. First the
FMAP compilation of the Magellan SAR imagery at 100 m
resolution has been assembled into a global overlay
image (see Figure) for
rapid panning and zooming over 95% of the planet [Pettengill et
al., 1991].
Second, the reprocessed altimetry data [Ford and
Pettingell, 1992; Rappaport et al. 1999]
have been edited and merged with a global spherical
harmonic model for topography [Wieczorek,
2007] to form a 10-km resolution global DEM of the
planet. Finally
the IAU feature names along with the content from “The
Face of Venus” [Roth
and Wall, 1995] have been assembled as an
overlay to provide basic naming and geology
information.
References: Ford, P. G., and G. H. Pettengill, (1992). Venus topography and kilometer-scale slopes, J. Geophys. Res., v. 97., 13103-13114. Pettengill, Gordon H.; Peter G. Ford, William T. K. Johnson, R. Keith Raney, Laurence A. Soderblom (1991). Magellan: Radar Performance and Data Products. Science, v.252 (5003): p. 260–5. Rappaport, N. J., A. S. Konopliv, and A. B. Kucinskas (1999), An improved 360 degree and order model of Venus topography, Icarus, 139, 19–31. Roth, Ladislav E; Stephen D Wall (1995). The Face of Venus : The Magellan Radar Mapping Mission. Washington, D.C.: National Aeronautics and Space Administration. Sandwell, D. and G. Schubert (1992), Evidence for Retrograde Lithospheric Subduction on Venus, Science, v. 257, p. 766-770. Saunders, S., and G. H. Pettengill (1991). Magellan: Mission Summary, Science, v. 252. (5003), p.247-249. Stofan, E. R., Sharpton, V. L., Schubert, G., Baer, G., Bindschadler, D. L., Janes, D. M., and Squyres, S. W., 1992, Global distribution and characterisitics of coronae and related features on Venus: Implications for origin and relation to mantle processes: Journal of Geophyscial Research, v. 97, p. 13347-13378. Wieczorek, M. A. (2007), Gravity and topography of the terrestrial planets, Treatise on Geophysics, 10, 165-205, doi:10.1016/B978-044452748-6/00156-5. |
Composite SAR Imagery (netcdf files and geotiff)
Global topography (netcdf files)
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