  Over the past decade there has been a large increase in the number of
automated camera networks that monitor the sky for fireballs. One of the goals
of these networks is to provide the necessary information for linking
meteorites to their pre-impact, heliocentric orbits and ultimately to their
source regions in the solar system. We re-compute heliocentric orbits for the
25 meteorite falls published to date from original data sources. Using these
orbits, we constrain their most likely escape routes from the main asteroid
belt and the cometary region by utilizing a state-of-the-art orbit model of the
near-Earth-object population, which includes a size-dependence in delivery
efficiency. While we find that our general results for escape routes are
comparable to previous work, the role of trajectory measurement uncertainty in
escape-route identification is explored for the first time. Moreover, our
improved size-dependent delivery model substantially changes likely escape
routes for several meteorite falls, most notably Tagish Lake which seems
unlikely to have originated in the outer main belt as previously suggested. We
find that reducing the uncertainty of fireball velocity measurements below
$\sim0.1$ km/s does not lead to reduced uncertainties in the identification of
their escape routes from the asteroid belt and, further, their ultimate source
regions. This analysis suggests that camera networks should be optimized for
the largest possible number of meteorite recoveries with measured speed
precisions of order 0.1 km/s.
