Build an RTK-GNSS Receiver using a Beagle Board, custom designed GNSS Receiver and rtklib. In robotics and agriculture centimeter precision in an outdoor environment can be crucial for a wide variety of different tasks. But with a starting price around 20000€ for the cheap systems RTK-GNSS is not an option for many projects.

Using the hardware already mentioned, an RTK-GNSS Receiver can be built for around 800$.

http://www.rtklib.com/

At the moment we need 2 lightweight and cheap RTK-GNSS Receivers in Hohenheim, one for a model plane and one for a new robot called Armadillo 2. Port SAFAR to Linux and to use Player/Stage instead of MRDS