Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004dps....36.0612k&link_type=abstract
American Astronomical Society, DPS meeting #36, #06.12; Bulletin of the American Astronomical Society, Vol. 36, p.1076
Astronomy and Astrophysics
Astronomy
Scientific paper
The direction and magnitude of global stratospheric wind on Titan was measured using the Goddard Space Flight Center Heterodyne Instrument for Planetary Wind And Composition, HIPWAC, at the National Astronomical Observatory of Japan Subaru Telescope on Mauna Kea, Hawaii. HIPWAC spectral resolving power of > 1,000,000 and the 0.36 arcsec diffraction limited FOV on Titan with the 8.2 m Subaru telescope enabled measurement of true emission line profiles of ethane near 12 microns on the East and West hemispheres of Titan. Differences in the line frequencies (Doppler shifts) determined the direction and magnitude of the wind. The line profiles were fit to retrieve ethane abundances and constraints on the thermal structure near 0.6 mbar pressures ( ˜210 km). The near equatorial FOV positions overlapped the Huygens probe entry latitude. Analyses retrieve a prograde wind of 170 ± 93 m/s. Ethane abundance is 0.7± 0.3 x 10-5. Possible differences in temperatures between the two hemispheres may also be indicated. Discussion of uncertainties will be presented as well as comparisons to earlier IR heterodyne measurements and to expected results from measurements on Subaru during the descent of Huygens into Titan's atmosphere on January 14, 2005 UT.
Work was supported by the NASA Planetary Astronomy Program.
Annen John
Buhl David
Fast Kelly Elizabeth
Hewagama Tilak
Kostiuk Theodor,
No associations
LandOfFree
New Measurements of Titan Winds and More does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with New Measurements of Titan Winds and More, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and New Measurements of Titan Winds and More will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1012616