User Requirements for the SatRef Ntrip Services


Using GPS Receivers with built-in NtripClient software / firmware


  • Required equipment:

    1. A GPS Receiver with built-in Ntrip Client software (or firmware), and

    2. Modem / Mobile phone for Internet connection

  • Receiver shall be able to connect to a Modem / Mobile phone via cable or wireless connection (e.g. Bluetooth) for Internet access

  • The Modem / Mobile phone shall be able to connect to the Internet via GPRS / 3G / HSDPA or other wired/wireless network. (Data charges by Network Operators may apply)

  • Basic Receiver requirements:

    • For DGPS Services - DGPS-enabled receivers with RTCM (Version 2.1) Input Interface.

    • For RTK Services - Phase measurement and RTK rover capability, supporting RTCM Version 2.3 (Message Type 20,21) or Version 3.0.

    • For Network-RTK Services - Phase measurement and RTK rover capability, supporting RTCM Version 2.3 (Message Type 20,21) or Version 3.0, Able to send the rover's position by NMEA GGA format automatically and periodically to the SatRef Ntrip Service IP address.


Using GPS Receivers without NtripClient software


  • Required equipment:

    1. A GPS Receiver, and

    2. a Mobile Device (e.g. Pocket PC / Notebook) with NtripClient software for Internet connection

  • Receiver shall be able to receive RTCM data streams from the Mobile Device via a cable or wireless connection (e.g. Bluetooth)

  • The Mobile Device shall be installed and running with a NtripClient software (e.g. GNSS Internet Radio, downloadable at BKG download page) to collect and forward the received RTCM data streams to the Receiver.

  • The Mobile Device shall be able to connect to the Internet via GPRS / 3G / HSDPA or other wired/wireless network.(Data charges by Network Operators may apply)

  • Basic Receiver requirements:

    • For DGPS Services - DGPS-enabled receivers with RTCM (Version 2.1) Input Interface.

    • For RTK Services - Phase measurement and RTK rover capability, supporting RTCM Version 2.3 (Message Type 20,21) or Version 3.0.

    • For Network-RTK Services - Phase measurement and RTK rover capability, supporting RTCM Version 2.3 (Message Type 20,21) or Version 3.0, Able to send the rover's position by NMEA GGA format to the Ntrip Client of the mobile device, and upload automatically and periodically to the SatRef Ntrip Service IP address.


Please consult your GPS equipment supplier to confirm the compatbility information.