Direct measurement of winds of Titan

Details Direct measurement of winds of Titan Direct measurement of winds of Titan

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.2361k&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 12, p. 2361-2364

Other

49

Planetology: Fluid Planets: Atmospheres-Structure And Dynamics, Planetology: Solar System Objects: Comparative Planetology, Planetology: Solar System Objects: Saturnian Satellites, Planetology: Solar System Objects: Instruments And Techniques

Scientific paper

We report the first direct measurement of wind velocity in the atmosphere of Titan, one of only two examples in our solar system of a slowly-rotating body with a dense atmosphere and a prime target of the Cassini mission. Zonal wind velocity was determined from Doppler shift of ethane lines emitted from Titan's stratosphere (~0.1- 7 mbar) measured by infrared heterodyne spectroscopy near 12 μm (λ/Δλ>=106). Prograde zonal circulation, in the direction of global rotation, is established with 94% statistical confidence. Results provide information regarding Titan meteorology constraining dynamical theories for slowly-rotating bodies, provide otherwise unobtainable data to optimize the Cassini Huygens Probe investigations, and demonstrate the capability for remotely measuring winds on a small, distant object.

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