RTKLIB gps module

I want to use RTKLIB on rapsberry pi 2 to provide nmea 183 GPGGA or PASHR message to pixhawk FC,to provide RTK solution.I wonder that what’s the required data item that must be provided?lat,lon,alt,PDOP,HDOP,VDOP,TDOP etc.

thanks for any help

I would add a topic into fake_GPS to take GPS data as input of the plugin.