Within the framework of the EUREF-IP project, an Ntrip Broadcaster has been recently installed in Penc, Hungary. This first broadcaster in Central Europe is maintained by the Satellite Geodetic Observatory and it provides access to real-time correction data from a number of active GNSS reference stations in Hungary. The NtripCaster software, available from the BKG is an Internet server used for disseminating differential and RTK correction data in RTCM-SC104 format (or raw GNSS data in proprietary binary format) based on the HTTP protocol.

Active GNSS stations equipped with dual frequency receivers and telecommunication facilities (Intranet/Internet connection) generate and transmit code and carrier phase corrections to the Network Centre at the SGO. The broadcaster software collects the data streams and re-transmits them via the Internet to a large number of users simultaneously on the same TCP/IP port. The users equipped with a GNSS receiver and Internet connection (rovers are using wireless Internet connection, e.g. GPRS) can access the required data streams and improve their positioning accuracies. At the moment RTK corrections from 5 stations – BUTE, ZALA, KAPO, SZFV and PENC – are available and further stations are being installed in 2004. The broadcaster also provides access to RTCM corrections (derived from RTCA) of 5 virtual EGNOS stations in Hungary.

Users in the test phase (by the end of 2004) may access the corrections free of charge.