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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 - PowerPoint PPT Presentation
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EUREF-IPStreaming GNSS data over the Internet
using NTRIP 1.0
Denise Dettmering
Federal Agency for Cartography and Geodesy (BKG)Frankfurt, Germany
CGSIC 45th Prague, Czech Republic, March 14-15, 2005
Content
EUREF-IP Pilot ProjectNtrip 1.0
Ntrip data streamsEUREF-IP Ntrip Broadcaster
Ntrip DGPS Professional Service Concept
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
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
NTRIP 1.0
Developed by RTCM SC-104 Radio Technical Commission for Maritime Services Special Committee on Differential Global Navigation Satellite Systems
NTRIP system components
Server
50...100 x max 5 kbit/s
1000... x max 5 kbit/s
Caster Client
• no direct communication between provider and user
• only one „real“ Internet Server (Caster)• Caster works as data splitter: mass-usage possible
Ntrip data streams
03/Mar/2005:654 real-time data streams, from: 27 NtripCaster
30 countries
Ntrip Broadcaster - Europe
EUREF-IP Ntrip Broadcaster
www.euref-ip.net:80 134 data streams16 networksEPN: 14 stations
EUREF-IP stations
EUREF-IP station GOPE
RoverReceiverRover
Receiver
NtripClientNtripClientNtripClient
Mobile IPMobile PIMobile IPMobile IPMobile PI
NtripTrackerNtripTracker
DSLDSL
NtripTracker
Mobile IPDSL
SystemOperatorSystem
OperatorSystem
Operator
BackupNtripMonitor
PrimaryNtripMonitor
PrimaryNtripCaster
NetworkDGPS VRS
ReferenceReceiver
ReferenceReceiver
NtripServerNtripServerNtripServer
DSLDSLDSL
BackupNtripCaster
EGNOSDGPS VRS
NtripServer
DSL
EGNOSReceiver
ReferenceReceiver
RoverReceiver
Internet
Ntrip DGPS Professional Service Concept
AdministrationRaw DataRTCM Corrections
PrimaryNtripCaster
NetworkDGPS VRS
ReferenceReceiver
Raw DataRaw Data
PrimaryNtripCaster
NetworkDGPS VRS
RoverReceiver
RTCM Corrections
BackupNtripCaster
EGNOSDGPS VRS
EGNOSReceiver
Backup
NtripClientNtripClient
Mobile IPMobile PI
NtripTrackerNtripTracker NtripServerNtripServer
DSLDSL DSLDSL Mobile IPMobile PI
ReferenceReceiver
ReferenceReceiver
RoverReceiverRover
Receiver
NtripClient
Mobile IP
NtripServerNtripServer
DSL
PrimaryNtripCaster
BackupNtripMonitor
NetworkDGPS VRS
PrimaryNtripMonitor
NtripTracker
Mobile IPDSL DSL
BackupNtripCaster
EGNOSDGPS VRS
EGNOSReceiver
ReferenceReceiver
RoverReceiver
SystemOperatorSystem
OperatorSystem
Operator
AdministrationRaw DataRTCM Corrections
Internet
Ntrip DGPS Professional Service Concept
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
