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EUREF-IP Streaming GNSS data over the Internet using NTRIP 1.0

EUREF-IP Streaming GNSS data over the Internet using NTRIP 1.0. Denise Dettmering Federal Agency for Cartography and Geodesy (BKG) Frankfurt, Germany CGSIC 45 th Prague, Czech Republic, March 14-15, 2005. Content. EUREF-IP Pilot Project Ntrip 1.0 Ntrip data streams

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EUREF-IP Streaming GNSS data over the Internet using NTRIP 1.0

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  1. EUREF-IP Streaming GNSS data over the Internet using NTRIP 1.0 Denise Dettmering Federal Agency for Cartography and Geodesy (BKG)Frankfurt, GermanyCGSIC 45th Prague, Czech Republic, March 14-15, 2005

  2. Content • EUREF-IP Pilot Project • Ntrip 1.0 • Ntrip data streams • EUREF-IP Ntrip Broadcaster • Ntrip DGPS Professional Service Concept

  3. EUREF-IP Pilot Project • real-time GNSS infrastructure on the Internet • selected EPN stations • disseminate RTCM corrections for differential positioning and navigation purposes • various other applications, like real-time orbit determination and atmospheric parameter estimation • Pilot Project: EUREF-IP

  4. NTRIP 1.0 • Networked Transport of RTCM via Internet Protocol • RTCM recommended standard • for streaming GNSS data over the Internet • transmission via TCP/IP • based on HTTP communication • HTTP port 80 for all communications (supported by most firewalls) • different data formats (RTCM/Raw measurement/...) • Internet Radio Technology Developed by RTCM SC-104 Radio Technical Commission for Maritime Services Special Committee on Differential Global Navigation Satellite Systems

  5. Caster 50...100 x max 5 kbit/s 1000... x max 5 kbit/s NTRIP system components Server Client • no direct communication between provider and user • only one „real“ Internet Server (Caster) • Caster works as data splitter: mass-usage possible

  6. Ntrip data streams 03/Mar/2005: 654 real-time data streams, from: 27 NtripCaster 30 countries

  7. Ntrip Broadcaster - Europe

  8. www.euref-ip.net:80 EUREF-IP Ntrip Broadcaster 134 data streams 16 networks EPN: 14 stations

  9. EUREF-IP stations

  10. EUREF-IP station GOPE

  11. Administration Raw Data Raw Data RTCM Corrections RTCM Corrections Reference Receiver Rover Receiver Reference Receiver Rover Receiver Backup Reference Receiver Rover Receiver EGNOS Receiver EGNOS Receiver NtripServer NtripClient NtripTracker NtripTracker NtripServer NtripClient NtripTracker NtripServer NtripClient NtripServer System Operator System Operator System Operator DSL Mobile IP Mobile IP DSL DSL Mobile PI DSL Mobile PI Mobile IP DSL Mobile IP DSL DSL Internet Primary NtripMonitor Backup NtripMonitor Primary NtripCaster Backup NtripCaster Network DGPS VRS EGNOS DGPS VRS Primary NtripCaster Primary NtripCaster Backup NtripCaster Network DGPS VRS Network DGPS VRS EGNOS DGPS VRS Ntrip DGPS Professional Service Concept Reference Receiver Rover Receiver

  12. EGNOS Receiver Backup NtripCaster EGNOS DGPS VRS Ntrip DGPS Professional Service Concept Administration Raw Data RTCM Corrections Reference Receiver Rover Receiver Reference Receiver Rover Receiver Reference Receiver Rover Receiver NtripServer NtripClient NtripTracker NtripTracker NtripServer NtripClient NtripTracker NtripServer NtripClient NtripServer System Operator System Operator System Operator DSL Mobile IP Mobile IP DSL DSL Mobile PI DSL Mobile PI Mobile IP DSL Mobile IP DSL DSL Internet Primary NtripMonitor Backup NtripMonitor Primary NtripCaster Network DGPS VRS

  13. Summary • Streaming GNSS data over Internet and cellular phone networks has proofed working • No significant degradation of performance compared to usage of other transportation media • Ntrip may disseminate all data streams with bitrates between 50 and 500 bytes/sec (different data formats) • RTCM committee has accepted Ntrip as standard for packet based communication • Multiple services already established, e.g. EUREF-IP • Various Ntrip clients and Ntrip servers are available

  14. Information http://igs.ifag.de/index_ntrip.htm euref-ip@bkg.bund.de

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