Updated Results from the Titan Global Ionosphere-Thermosphere Model

We present updated results from the Titan Global Ionosphere-Thermosphere Model (T-GITM) (Bell et al. [2010a]). We use both a 1-D and 3-D version of T-GITM to address simultaneously the escape of methane and molecular hydrogen from Titan's upper atmosphere. We will compare simulated fields with Cassini Ion Neutral Mass Spectrometer (INMS) neutral and ion density data for calibration and validation. We will put our current estimates for atmospheric escape within the context of previous work (e.g. Cui et al. [2008, 2011], Strobel et al. [2010], Tucker et al. [2009], and Yelle et al. [2008]).