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During the mapping cycle 1 (left-looking) radar surface mapping on Venus (September 15, 1990 to May 15, 1991), around 70% of the Venusian surface was mapped by synthetic aperture radar. In cycle 2 (right-looking), 54.5% of the surface was mapped, mainly the south pole regions and gaps from cycle 1 during May 15, 1991 to January 14, 1992.
This scenario arises when Venus is at its maximum separation from the ecliptic and concomitantly at inferior conjunction; then one hemisphere (Northern or Southern) will be able to see it at both times. This opportunity presented itself most recently for Northern Hemisphere observers within a few days on either side of March 29, 2001, and for ...
Radar global map of the surface of Venus The hemispheric view of Venus, as revealed by more than a decade of radar investigations culminating in the 1990–1994 Magellan mission, is centered at 180 degrees east longitude. The geology of Venus is the scientific study of the surface, crust, and interior of the planet Venus.
Radar mosaic from Magellan showing a 600-km-long segment of Baltis Vallis, a channel on Venus that is longer than the Nile. The surface of Venus contains over 200 channel systems and named valles which resemble terrestrial rivers. These channels vary in length and width and are commonly found in planar regions of the planet.
Color-coded elevation map, showing the elevated terrae "continents" in yellow: Ishtar Terra at the top. Topographic radar image view of Venus, with Ishtar Terra near center. Ishtar Terra / ˈ ɪ ʃ t ɑːr ˈ t ɛr ə / [1] is the second largest of the three continental terrae regions on the planet Venus, the others being Aphrodite Terra and ...
A radar map of the distances ( ) and positions ( ) of all known stellar bodies or systems within 9 light years (ly) (for within 12 ly see this map). Their distances are entered outward from the Sun (Sol) between concentric circles, each representing one ly, and arranged clockwise in hours of right ascension .
VISAR (Venus Interferometric Synthetic Aperture Radar) is designed to generate global data sets for topography (250 m horizontal by 5 m vertical accuracy) and SAR imaging at 30 m resolution with targeted resolution at 15 m (compare to Magellan which had 50 km spatial and 100 m vertical resolution). VERITAS will create the first planetary active ...
Radar astronomy differs from radio astronomy in that the latter is a passive observation (i.e., receiving only) and the former an active one (transmitting and receiving). Radar systems have been conducted for six decades applied to a wide range of Solar System studies. The radar transmission may either be pulsed or continuous.