Hydrocarbon species, and in particular CH$_4$, play a key role the stratosphere--thermosphere boundary of Jupiter, which occurs around $\mu$-bar pressure level. Previous analyses solar occultation, He Ly-$\alpha$ airglow, ISO/SWS measurements radiance 3.3 $\mu$m have inferred significantly different methane concentrations. Here we aim to accurately model CH$_4$ at measured by using comprehensiv...