Am 11.02.2015 um 04:29 schrieb Ben Brockert:
It's on the high end of hardware for amateur projects, but it's incredibly cheap as differential GPS Real Time Kinematics solutions cost: the Piksi. http://www.swiftnav.com/piksi.html $2000 for a pair.
some time ago I had looked into Septentrio's line of attitude solving GPS receivers. ( for a customer app ) Pricing wasn't completely overscale. uwe