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Based on a multi-instrumental Cassini dataset we make model versus observation comparisons of plasma number densities, nP=(nenI)1/2 (ne and nI being the electron number density and total positive ion number density, respectively) and short-lived ion number densities (N+, CH2+, CH3+, CH4+) in the southern hemisphere of Titan’s nightside ionosphere over altitudes ranging from 1100 and 1200km and from...
We derive vertical temperature profiles from Ion Neutral Mass Spectrometer (INMS) N 2 density measurements from 32 Cassini passes. We find that the average temperature of Titan’s thermosphere varies significantly from pass-to-pass between 112 and 175K. The temperatures from individual temperature profiles also varies considerably, with many passes exhibiting wave-like temperature perturbations...
The Cassini mission has investigated Titan’s upper atmosphere in detail and found that, under solar irradiation, it has a well-developed ionosphere, which peaks between 1000 and 1200km. In this paper we focus on the T40, T41, T42 and T48 Titan flybys by the Cassini spacecraft and use in situ measurements of N 2 and CH 4 densities by the Ion Neutral Mass Spectrometer (INMS) as input...
In this paper we present an in-depth study of the distributions of various neutral species in Titan's upper atmosphere, between 950 and 1500 km for abundant species (N 2 , CH 4 , H 2 ) and between 950 and 1200 km for other minor species. Our analysis is based on a large sample of Cassini/INMS (Ion Neutral Mass Spectrometer) measurements in the CSN (Closed Source Neutral) mode,...
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