An undergraduate student, Tommaso Aldinucci, working for his first level degree thesis in Information Engineering at GOL, found as many as 6 improved trajectories for the Tandem mission test set maintained by ESA. The new improved routes are now available at the ESA ACT website.
The method used, really quite elementary, is briefly described in Aldinucci’s slides (in italian). These trajectories significantly improve over past records, stable since many years.
Improved space trajectories found by an undergraduate student at GOL