Coordinates of RTK base station

I am successfully using a Here+ Receiver pair (rover connected to a Pixhawk 2.1 running ArduPilot:Copter) with QGroundControl. Now I would like to know the coordinates of both base station and rover. The rover coordinates are, as far as I understand, transmitted in the GPS_RAW_INT message. How about the base station coordinates, do I find those somewhere?