title: Venus: topography revealed by radar data.
abstract: Surface height variations over the entire equatorial region on Venus have been estimated from extended series of measurements of interplanetary radar echo delays. Most notable is a mountainous section of about 3-kilometer peak height located at a longitude of 100 degrees (International Astronomical Union coordinate system). The eastern edge has an average inclination of about 0.5 degrees, which is unusually steep for a large-scale slope on Venus. The resolution of the radar measurements along the surface of Venus varied between about 200 and 400 kilometers with a repeatability in altitude determination generally between 200 and 500 meters. The mean equatorial radius was found to be 6050.0+/-0.5 kilometers.
authors.forename: D B
authors.initials: DB
authors.lastname: Campbell
authors.forename: R B
authors.initials: RB
authors.lastname: Dyce
authors.forename: R P
authors.initials: RP
authors.lastname: Ingalls
authors.forename: G H
authors.initials: GH
authors.lastname: Pettengill
authors.forename: I I
authors.initials: II
authors.lastname: Shapiro