  Progress in astrometry and orbital modelling of planetary moons in the last
decade enabled better determinations of their orbits. These studies need
accurate positions spread over extended periods. We present the results of the
2014-2015 Brazilian campaign for 40 mutual events from 47 observed light curves
by the Galilean satellites plus one eclipse of Amalthea by Ganymede. We also
reanalysed and updated results for 25 mutual events observed in the 2009
campaign.
  All telescopes were equipped with narrow-band filters centred at 889 nm with
a width of 15 nm to eliminate the scattered light from Jupiter. The albedos'
ratio was determined using images before and after each event. We simulated
images of moons, umbra, and penumbra in the sky plane, and integrated their
fluxes to compute albedos, simulate light curves and fit them to the observed
ones using a chi-square fitting procedure. For that, we used the complete
version of the Oren-Nayer reflectance model. The relative satellite positions
mean uncertainty was 11.2 mas ($\sim$35 km) and 10.1 mas ($\sim$31 km) for the
2014-2015 and 2009 campaigns respectively. The simulated and observed
\textsc{ascii} light curve files are freely available in electronic form at the
\textit{Natural Satellites DataBase} (NSDB).
  The 40/25 mutual events from our 2014-2015/2009 campaigns represent a
significant contribution of 17%/15% in comparison with the PHEMU campaigns lead
by the IMCCE. Besides that, our result for the eclipse of Amalthea is only the
4$^{th}$ such measurement ever published after the three ones observed by the
2014-2015 international PHEMU campaign. Our results are suitable for new
orbital/ephemeris determinations for the Galilean moons and Amalthea.
