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GEO MAP OF BETA REGIO QUAD V-17, VENUS

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Product Details

Product Number
208568
Series
SIM-3023
Scale
1:5,000,000
Alternate ID
SIM3023
ISBN
978-1-4113-2170-0
Authors
ALEXANDER BASILEVSKY
Version Date
01/01/2008
Media
Paper
Format
Folded

Additional Details

Description
The Magellan Mission

The Magellan spacecraft orbited Venus from August 10, 1990, until it plunged into the Venusian atmosphere on October 12, 1994. Magellan Mission objectives included (1) improving the knowledge of the geological processes, surface properties, and geologic history of Venus by analysis of surface radar characteristics, topography, and morphology, and (2) improving the knowledge of the geophysics of Venus by analysis of Venusian gravity.

The Magellan spacecraft carried a 12.6-cm radar system to map the surface of Venus. The transmitter and receiver systems were used to collect three data sets: (1) synthetic aperture radar (SAR) images of the surface, (2) passive microwave thermal emission observations, and (3) measurements of the backscattered power at small angles of incidence, which were processed to yield altimetric data. Radar imaging, altimetric, and radiometric mapping of the Venusian surface was done in mission cycles 1, 2, and 3 from September 1990 until September 1992. Ninety-eight percent of the surface was mapped with radar resolution on the order of 120 meters. The SAR observations were projected to a 75-m nominal horizontal resolution, and these full-resolution data compose the image base used in geologic mapping. The primary polarization mode was horizontal-transmit, horizontal-receive (HH), but additional data for selected areas were collected for the vertical polarization sense. Incidence angles varied between about 20 and 45 degrees.

High resolution Doppler tracking of the spacecraft was done from September 1992 through October 1994 (mission cycles 4, 5, 6). Some 950 orbits of high-resolution gravity observations were obtained between September 1992 and May 1993 while Magellan was in an elliptical orbit with a periapsis near 175 kilometers and an apoapsis near 8,000 kilometers. An additional 1,500 orbits were obtained following orbit-circularization in mid-1993. These data exist as a 75 degree by 75 degree harmonic field.

Survey Date
2008
Print Date
2008
Height In Inches
36.000
Length In Inches
45.000
Boundary Type
Quadrangle
Two Sided
No
Pieces
2
Languages
English
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