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| Titel |
The Huygens Doppler Wind Experiment: Ten Years Ago |
| VerfasserIn |
Michael Bird, Robin Dutta-Roy, Yvonne Dzierma, David Atkinson, Michael Allison, Sami Asmar, William Folkner, Robert Preston, Dirk Plettemeier, Len Tyler, Peter Edenhofer |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250101973
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| Publikation (Nr.) |
 EGU/EGU2015-1245.pdf |
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| Zusammenfassung |
| The Huygens Doppler Wind Experiment (DWE) achieved its
primary scientific goal: the derivation of Titan's vertical wind
profile from the start of Probe descent to the surface.
The carrier frequency of the ultra-stable Huygens radio signal
at 2040 MHz was recorded using special narrow-band receivers
at two large radio telescopes on Earth: the Green Bank Telescope
in West Virginia and the Parkes Radio Telescope in Australia.
Huygens drifted predominantly eastward during the parachute descent,
providing the first in situ confirmation of Titan's prograde
super-rotational zonal winds. A region of surprisingly
weak wind with associated strong vertical shear reversal
was discovered within the range of altitudes from 65 to 100 km.
Below this level, the zonal wind subsided monotonically
from 35 m/s to about 7 km, at which point it reversed direction.
The vertical profile of the near-surface winds implies the
existence of a planetary boundary layer. Recent results on
Titan atmospheric circulation within the context of the DWE
will be reviewed. |
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