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The Building and Operation of the ODOT VRS Real Time GNSS Network

The Building and Operation of the ODOT VRS Real Time GNSS Network. David J. Beiter, PE/SIT CORS/ VRS Coordinator, Office of CADD and Mapping Services. January 9, 2014. Background. April, 2000 – NGS Convocation

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The Building and Operation of the ODOT VRS Real Time GNSS Network

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  1. The Building and Operation of the ODOT VRS Real Time GNSS Network David J. Beiter, PE/SIT CORS/ VRS Coordinator, Office of CADD and Mapping Services January 9, 2014

  2. Background • April, 2000 – NGS Convocation • NGS made it clear that the future of positioning would be based on GPS technology using CORS stations. • Conventional positioning technologies at NGS would be phased out. • ODOT began to plan a CORS network that would meet ODOT’s current and future needs.

  3. CORS Design Considerations Uniformity Monument Stability Signal Quality Continuous Power Lightning Protection Vandal Resistant Single Point Control Network Connections Environmental Factors Maintenance

  4. CORS Monument Design

  5. Form Design

  6. Initial CORS Cabinet Design

  7. Test Location for Data Quality

  8. Phase 110 Classic Stations

  9. Phase 27 Additional Classic Stations

  10. Phase 3VRS Test Area

  11. Phase 4Statewide VRS

  12. Construction Constructed the network using ODOT staff. The benefits included: • Quality control • Design flexibility • System familiarity for future maintenance • Timeliness

  13. Test Boring

  14. Drilling Foundation

  15. Reinforcement

  16. Trench Construction

  17. Underground Junction Box

  18. Setting Forms (Original Style)

  19. Setting Forms (Current Style)

  20. Placing Concrete

  21. Antenna Mount

  22. Mount Installation

  23. Completed “Classic” Monument Original Style

  24. Completed “Classic” Monument Current Style

  25. CORS ClassicSouth Bass Island

  26. Completed “Classic” CabinetOriginal Style

  27. Completed “Classic” CabinetCurrent style

  28. CORS “Lite” Mount

  29. AcknowledgementDecember 2004

  30. System Status • As of 1/9/14 • 54 Stations • 18 “Classic” Concrete monuments • 36 “Lite” Building mount monuments • 2527 Usernames and passwords issued • 382 Concurrent users logged in (max) 5/17/13

  31. ODOT VRS “Firsts” First Statewide Real Time GPS Network in USA (2004) First Statewide Dual Constellation Real Time Network in USA (2008) First Real Time GNSS Network to be used by the Ag Sector (2009) Highest concurrent user load in world (382 concurrent users, May 2013) Largest user base Real Time Network in the world +2400 logins issued (November 2013)

  32. How Does VRS Work?

  33. Initial Statewide VRS Single Zone

  34. VRS – North Zone

  35. VRS – South Zone

  36. Server Specifications ServerModel / Processor / RAM / Storage VRS 01 HP Proliant DL 380 G4 Dual 3.4 GHz, 3 GB RAM, 400 GB HD VRS 02 HP Proliant DL 380 G4 Dual 3.4 GHz, 3 GB RAM, 400 GB HD VRS 03 HP Proliant DL 380 G4 Dual 3.4 GHz, 3 GB RAM, 400 GB HD VRS 04 HP Proliant DL 380 G4 Dual 3.4 GHz, 3 GB RAM, 130 GB HD VRS 05 HP Proliant DL 380 G4 Dual 3.4 GHz, 3 GB RAM, 597 GB HD VRS 06 HP Proliant DL 380 G3 Dual 3.0 GHz, 3 GB RAM, 1.46 TB HD VRS 07 HP Proliant DL 380 G4 Dual 3.4 GHz, 3 GB RAM, 540 GB HD VRS08 HP Proliant DL 380 G7 Quad 2.66 GHz, 8GB RAM, 146 GB HD VRS09 HP Proliant DL 380 G7 Quad 2.66 GHz, 8GB RAM, 146 GB HD

  37. Server Summary • All Servers are housed at the State of Ohio Computer Center in Columbus (SOCC) • 9 ea. Servers total • 5 dedicated RTCM Generators • 2 data logging servers (Hourly Files) • 1 NTRIP Caster / Streaming manager • 1 FTP Server (.dat format and RINEX2)

  38. VRS Servers - Data Flow

  39. Accessing VRS

  40. Accessing VRS

  41. Telecommunications Solutions

  42. User Agreements User Agreements Pending! System is still free of charge, but we are considering charging a nominal user fee to offset system maintenance and future upgrades

  43. User Access • Unique user log-on and password for each individual rover. • Multiple data formats are available, CMRx, CMR+, RTCM2.3, RTCM3.0 and ODOT_Ag - Both NAD 83 (CORS96) and NAD 83 (2011) Coordinates are available, (CORS 96 Coordinates will no longer be available after 6/30/14)

  44. Public Awareness Numerous training sessions and public presentations have been utilized to make potential users aware of what is available. • OTEC • GIS Conference • PLSO Conference • Farm and Science Review

  45. Cooperation with Other Entities University City County County (outside Ohio) Adjoining state agencies/ systems

  46. Maintenance -Preventative maintenance is being performed to ensure maximum availability. -Weekend and Holiday monitoring -VRS “Hotline” cell phone

  47. System Maintenance

  48. Approximate VRS Users by Industry

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