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DPS Meeting Oct 8 2010

Tholins in the Upper Atmosphere of Titan Yuk Yung (Caltech ) X . Zhang (Caltech) M . C. Liang ( Academia Sinica , Taiwan) D. E. Shemansky (Space Environment Technologies ). DPS Meeting Oct 8 2010.

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DPS Meeting Oct 8 2010

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  1. Tholins in the Upper Atmosphere of Titan Yuk Yung (Caltech) X. Zhang (Caltech) M. C. Liang (Academia Sinica, Taiwan) D. E. Shemansky (Space Environment Technologies) DPS Meeting Oct 8 2010 P36.08 Vertical Structure Of The Titan Atmosphere From Cassini UVIS Observations P11.11 Aerosol Heating in the Stratosphere of Jupiter

  2. Lorenz + Mitton 2002

  3. Solar Scattering Stellar Occultation J. Ajello

  4. tholin CH4 Stellar Occultation UVIS spectrum Impact: 514 km Liang et al. 2007

  5. Calibration • Scattered light : Shemansky et al. 2009 • Calibration : 3-15-02 Rept by UVIS Team

  6. Important Parameters Single Scattering Albedo (SSA): SSA = Qs/Qe Goody and Yung 1989

  7. SSA at 1875 Å Obs: 0.118 Mie code calculation Refractive Index from Khare and Sagan (1984) 16 nm

  8. Shemansky et al. 2010

  9. Comparisons . 2 Trainer, et al 2006 Tomasko et al. 2008: ~100 km 50 nm radius 3000 monmers

  10. Summary • Tholin Radius at 1040 km: 16 nm Liang et al. (2007) “guessed” 12.5 nm from Stellar Occultation only • Comparable to 25 nm (in radius) from Trainer et al. (2006) • Source of monomers at ~100 km from Tomasko et al. (2008)

  11. Thanks • Cassini UVIS (PI Esposito) • PATM (Phil Crane) • OPR (Curt Niebur)

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