Other
Scientific paper
Dec 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992lpico.789..128t&link_type=abstract
In Lunar and Planetary Inst., Papers Presented to the International Colloquium on Venus p 128-129 (SEE N93-14288 04-91)
Other
Altimetry, Backscattering, Magellan Spacecraft (Nasa), Radar Echoes, Radar Imagery, Radar Scattering, Scattering Functions, Venus Surface, Analytic Functions, Exponential Functions, Radio Spectra, Simultaneous Equations, Topography, Venus (Planet)
Scientific paper
Radar backscatter functions Sigma-(carat)0(phi) for incidence angles between 0 less than or equal to phi less than or equal to 4-10 deg were derived from Magellan altimetry radar echoes. The procedure includes constrained solution of a system of simultaneous equations for which the echo-spectrum and echo time profile are inputs. A practical and workable set of constraints was applied; optimization and improved results are expected as the analysis matures. The scattering functions yield information on small-scale surface structures (tens of centimeters to tens of meters) but averaged over hundreds of sq km. RMS surface slopes derived from fits of analytic functions to the Sigma-(carat)0(phi) results were converted to map form and show patterns similar to those reported using other techniques. While all three forms are found on Venus, fit residuals imply that an exponential scattering function matches data better than either the Hagfors or Gaussian form in most areas, although the Hagfors function may be a better descriptor at some sites. Limited study of image data indicates that average backscatter cross section, and possibly its slope, can be derived at oblique angles (17 deg less than or equal to phi less than or equal to 45 deg). Offsets of the echo peak in altimetry spectra are surprisingly common and are loosely correlated with Venus topography, but no cause for this phenomenon was identified.
Holmann Edgar
Maurer Michael J.
Simpson Richard A.
Tyler Leonard G.
No associations
LandOfFree
Scattering properties of Venus' surface does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Scattering properties of Venus' surface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scattering properties of Venus' surface will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1138661