I have bought GPS-11058 from Sparkfun and would like to increase accuracy using DGPS. My first idea was to download these data from the net and upload them on gps module using Binary commands (setting ephemeris data). As I saw, ephemeris data in binary commands consists by 3 subframes and ionospheric corrections are in subframes 4 and 5 which is not handled by this gps module.
So my current idea is to get raw measurments from gps module and calculating position using rtklib. Is able to get this data from Sparkfun GPS-11058?