The Trimble SPS356 sensor uses a combined GNSS/Beacon antenna (e.g. Trimble GA830) to receive RTCM correction data from the radio beacons via the integrated beacon receiver. In addition to the DGNSS corrected position, the system provides information about the reception quality of the beacon signal (SNR, WER, field strength) and is therefore suitable as a Far Field Monitoring Station for DGNSS transmissions via radio beacons.