We report about the first detailed uncertainty analysis concerning the kinetics parameters of
the ion–molecule reactions included in a Titan's ionospheric chemistry model. Uncertainty
propagation has been performed by Monte Carlo sampling. Different possible descriptions
of the uncertainties on the rate constants are discussed and compared on the basis of our
state of knowledge about ion–molecule reaction rates laboratory measurements. We
propose also a new method for the treatment of branching ratios correlated uncertainties …