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Availability and Distribution of NRCan Real-Time Data

Availability and Distribution of NRCan Real-Time Data. Ken MacLeod, Tony Searle, Brian Donahue, Mike Craymer, Mike Schmidt and Mark Caissy. Overview. NRCan continuous tracking stations Canadian Active Control Network Regional Networks Real-time Data Formats Real-time Data Access Methods

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Availability and Distribution of NRCan Real-Time Data

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  1. Availability and Distribution of NRCan Real-Time Data Ken MacLeod, Tony Searle, Brian Donahue, Mike Craymer, Mike Schmidt and Mark Caissy

  2. Overview • NRCan continuous tracking stations • Canadian Active Control Network • Regional Networks • Real-time Data Formats • Real-time Data Access Methods • Summary

  3. NRCan Continuously Operating Reference Stations

  4. Canadian Active Control Network • 19 stations available • GPS available from all • Glonass will be available from most this year • Most have external clocks • RTCM data format specifications require clock steering (+- 300m)

  5. CSRS Core Network

  6. Continuously Operating Regional Networks • Great Lakes, St Lawrence, Eastern and Other Southern Canada Stations (17 stations), 13 have internet access and data could be made available in real-time • Northern regional stations (6 stations),would require either Internet or hardware upgrades • Western Canada Deformation Array – GSC (17 stations), 10 have internet access and could be made available. • Total of 23 stations from regional networks

  7. Great Lakes, St Lawrence and Eastern Canada Stations

  8. Northern Regional Stations

  9. Western Canada Deformation Array (WCDA)

  10. Real-Time Data Formats • Station data will be available in RTCM 3.x format • RTCM is the standard format used by many RTK network operators • RTCM Message types • 1004(GPS Observations issued every second) • 1006 Antenna reference point issued every 10 seconds • 1008 Antenna Description issued every 10 seconds

  11. Real-Time Data Format Continued • GPS Ephemeris planned (message type 1019) • Glonass message types planned :1012(Observations) and 1020 (Ephemeris) • RTCM State Space correction message planned • New High Precision RTCM Observation format planned

  12. Data Access Methods • GSD is currently running a Network Transport of RTCM via Internet Protocol (NTRIP) Caster • Free NTRIP Clients are available • User requests a username and password and can access the NTRIP Caster • Some free NTRIP Client software to access data wirelessly is available.

  13. NTRIP Caster Mount Table

  14. BNC Client Software

  15. Summary • Real-time Internet GNSS data is now widely available • NRCan could make 19 Stations available in real-time (beta test stage and best effort service). Other 23 could be made available if sufficient interest. • NRCan is looking for feedback from stakeholders • Questions

  16. Link to NTRIP Software • http://igs.bkg.bund.de/ntrip/download

  17. Click to add text

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