Networked DGPS via Internet

1
Networked DGPS via Internet
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
2
Do we need networked DGPS? EuroNav DGPS network
software Internet and geodetic data Conclusions
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
3

• S/A 50-100m ? 5 15m
• WADPS ? 1 2 m
• - EGNOS (summer 2005)
• - ESTB/WAAS (working)
• - SISNeT (higher availability)
• single base station DGPS ? 0.5 2m
• - inhomogeneous or local only coverage

http//www.ga.gov.au/nmd/geodesy/argn/saplots/darw
_hat.gif
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
4

• User requirements for broadcast services
• 5 m current car navigation, ...
• 1 m lane accuracy in car navigation, ...
• 0.5 m forestry, farming, aviation, ...
• 0.01 m geodetic users, science, ...
• gt 5 m absolute GPS
• 5 m 1 m DGPS
• 0.50 m networked DGPS
• lt 0.50 m RTK

Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
5

• DGPS users not interested in raw position
• integration in business processes ? solutions
• acceptance depends on pricing and savings
• market requires reasonable price and easy access
• few reference stations
• cheap communication (provider and user)
• possibly densification with RTK when required

Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
6
Do we need networked DGPS? EuroNav DGPS network
software Internet and geodetic data Conclusions
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
7

• EuroNet GNSS Software
• full featured single station GNSS processing
  software
• module for generating network based DGPS
• internet support for data acquisition and data
  export (NTRIP)
• raw data management and distribution (together
  with EuroRef)
• source code available, cooperations possible
• soon higher accuracy (networked RTK)

Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
8
Hungary Kaposvar
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
9
Hungary Kaposvar
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
10

• Hungarian test
• 5 reference stations enough for whole country
• homogeneous coverage
• availability depends on redundance (no single
  point of failure)
• With the help of this sofware reference station
  networks can be densified with lower budget and
  single-station failures can be handled without
  significant performance degradation.
• 
  
  Tamás Horváth (FÖMI-SGO)

Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
11

• WWW based monitoring
• display of software states (e.g. data
  availability)
• monitoring positioning
• display ionospheric influence (RTCA based)
• history for comparisons
• monitoring satellite visibility (station
  shadowing)
• remote access
• . . .

Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
12
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
13
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
14
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
15
Do we need networked DGPS? EuroNav DGPS network
software Internet and geodetic data Conclusions
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
16
Internet based (NTRIP) raw data delays are 1-2
seconds
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
17

• Why using the Internet for data transfer?
• available nearly everywhere
• standardized protocols (TCP/IP, RTCM-NTRIP)
• cheaper than most other solutions
• better availability using redundancy
• remote administration
• easy monitoring
• Why not?
• Hacking, viruses ? security concept required

Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
18

• Reference station NtripS 05
• GNSS receiver drivers
• generating RINEX
• direct NTRIP upload
• WWW administration
• special hardware for long maintenance freedom
• security enhanced software
• automatic updates
• developed in cooperation with Internet Media
  Solutions

Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
19

• EuroRef Software
• flexible UNIX based reference station software
• supports lots of receiver types, data types and
  settings
• support for internet based real time data access
• minimum hardware requirements (100MHz systems
  work fine)
• export to standard formats (e.g. RINEX)
• sold seperately from NtripS 05 as well

Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
20
Do we need networked DGPS? EuroNav DGPS network
software Internet and geodetic data Conclusions
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
21

• Networked DGPS via Internet
• easy, cheap, reliable, homogeneous
• cooperations between data sources and service
  providers
• DGPS networking increases accuracy and
  reliability
• many advantages for controling and monitoring
• EuroNav provides
• EuroRef reference station software
• EuroNet DGPS network software
• NtripS 05 reference station hardware

Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005
22
Thanks for your attention and feel free to ask.
http//www.
.de/ dirk.stoecker_at_euronav.de
Dipl.-Ing. Dirk Stöcker EuroNav
Service GmbH CGSIC/IISC 14-15.03.2005