I suspect the days of 'free use' of such a wonderful facility as GPS are drawing to a close. The two way nature of Galileo makes me suspicious its main added function aside from Distress calling is to give the facility to turn off for you if your subscription is not up to date!
I'm interested why GPS jamming trials have to take place? Are they trials of people who have jammed the amazing facility of GPS, or are they trials of how best to jam up a GPS system (why?). Can we look ahead to seeing GPS jammed to enforce complete take-up of Galileo (at a cost to every user)? Can we look ahead to seeing military action between the US and Europe over political manipulation of this sort? I am perfectly happy with GPS- its free functioning gives my car satnav (TomTom and Garmin I've been through- Tom Tom was crap) all the power I need. GPS powers aeroplanes for free. Why exactly are we developing Galileo at enormous cost (apart from Road Usage Tax reasons!)? A big project, but the whole thing stinks!