Io's Surface Topography - Oliver White (SETI Talks)
Μετάδοση με ζωντανή ροή στις 30 Ιουλ 2013
SETI Talks archive: http://seti.org/talks
No
instrumentation specifically designed to measure the topography of a
planetary surface has ever been deployed to Jupiter's moon Io, the most
volcanically active body in the Solar System. Available mapping
techniques that exist to perform such a task in the absence of the
relevant instrumentation include stereo and photoclinometry
(shape-from-shading) processing of available Voyager and Galileo
imagery. These techniques have been successfully applied to the icy
moons of the giant planets, but Io is a much more challenging subject
due to its complex and changing photometric behavior and the inherent
characteristics of the Ionian surface, as well as the inherent nature of
Galileo imagery. This presentation will describe our efforts to
produce the best quality digital elevation models (DEMs) of Io to date
using both techniques, to control these DEMs using Galileo limb profiles
(the only true topographic ground data available), and to merge and
mosaic the DEMs to form a global topographic map of Io. While our
investigation has focused almost entirely on refining our mapping
technique, future science objectives that can be addressed by the data
in the DEMs will be discussed.
No
instrumentation specifically designed to measure the topography of a
planetary surface has ever been deployed to Jupiter's moon Io, the most
volcanically active body in the Solar System. Available mapping
techniques that exist to perform such a task in the absence of the
relevant instrumentation include stereo and photoclinometry
(shape-from-shading) processing of available Voyager and Galileo
imagery. These techniques have been successfully applied to the icy
moons of the giant planets, but Io is a much more challenging subject
due to its complex and changing photometric behavior and the inherent
characteristics of the Ionian surface, as well as the inherent nature of
Galileo imagery. This presentation will describe our efforts to
produce the best quality digital elevation models (DEMs) of Io to date
using both techniques, to control these DEMs using Galileo limb profiles
(the only true topographic ground data available), and to merge and
mosaic the DEMs to form a global topographic map of Io. While our
investigation has focused almost entirely on refining our mapping
technique, future science objectives that can be addressed by the data
in the DEMs will be discussed.
ANAΡΤΗΣΗ ΑΠΟ ΤΟ YOUTUBE 22/3/2014
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