<?xml version='1.0' encoding='utf-8'?>
<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:contributor>P.G. Ford</dc:contributor>
  <dc:contributor>W.E. Brown</dc:contributor>
  <dc:contributor>W.M. Kaula</dc:contributor>
  <dc:contributor>C.H. Keller</dc:contributor>
  <dc:contributor>H. Masursky</dc:contributor>
  <dc:contributor>G.E. McGill</dc:contributor>
  <dc:creator>G.H. Pettengill</dc:creator>
  <dc:date>1979</dc:date>
  <dc:description>&lt;p&gt;Altimetry and radar scattering data for Venus, obtained from 10 of the first 13 orbits of the Pioneer Venus orbiter, have disclosed what appears to be a rift valley having vertical relief of up to 7 kilometers, as well as a neighboring, gently rolling plain. Planetary oblateness appears unlikely to exceed 1/2500 and may be substantially smaller.&amp;nbsp;&lt;/p&gt;</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>10.1126/science.203.4382.806</dc:identifier>
  <dc:language>en</dc:language>
  <dc:publisher>American Association for the Advancement of Science</dc:publisher>
  <dc:title>Pioneer Venus radar mapper experiment</dc:title>
  <dc:type>article</dc:type>
</oai_dc:dc>