I just realized this is the very first blog I ever wrote :)
RTK GNSS is an interesting topic for many quadrotor diyers like myself. It can provide stable sub meter coordinates which is very attractive for autonomous quadrotor flights. Initially, I tried RTKLIB on windows platform, and the result is pretty encouraging. However, I cannot imagine to have a windows running computer on a quad. Intel edison is another option for me: reasonably priced, small enough, and powerful enough to run real time RTK algos. After having this idea for a few month, I noticed REACH is commercialized RTK GPS using a very much close methodology. My intention is not to commercialize my design so REACH's results confirmed Intel Edison is suitable for RTK algos.
In the second version design, I would like to have Linux take over the control. which means linux can get the data for running RTK algo without the help of of a MCU. In my design, I put a four port USB hub on board along with a few USB-UART bridges. These USB-UART converters will get rover data from GPS modules, and reference data from either MCU or 433Mhz radio. On top of that, the USB hub also connected to a 3G modules. in this way, the RTK module could get online to take advantage from real time networks.