Florida Permanent GPS Reference Network

R. Scott Harris

Florida Department of Transportation

Tallahassee, Florida

Station Details• Planned ( 40+)

• Installations prior to 8/04 (40)

• Current spacing at 45 mile radius

• Continuing densification to squeeze spacing down to 25 mile radius adding 30+ stations.

• Recon (All)

The Anatomy of Our Network

Circuit Details• TCP/IP

• 56/128/T1 Permanent Virtual Circuits on Frame Relay

• Near Real-Time (<100ms)

• Secure

• Redundant

The Anatomy of Our Network

The Anatomy of Our Network

Network Operation Center• Windows based real-time Control and Integrity

Monitoring software for a large network of reference stations.

• Provides real-time statistics on GPS network performance and alarming for out of tolerance conditions.

• Allows archiving and distribution of data

• Hourly Zipped RINEX files

Control and Integrity Monitoring

• Real Time from Software

• Post Processed from Software

• NGS/FSL daily processing

The Anatomy of Our Network

Primary Applications

Airborne Kinematic Control

Static GPS Campaigns

•1 second data•1 hour RINEX files•24/7•www.myfloridagps.com•RTK coming soon

Additional Applications

Water Vapor Analysis

Structural Monitoring

245 246 247 248 249 250 251 252 253 254 255 256 257 258D a y o f Y e a r (2 0 0 4 )

980.0

985.0

990.0

995.0

1000.0

1005.0

1010.0

1015.0

1020.0

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Sunshine Skyway Bridge – Tampa

• 5 receiver suite

• Other sensors being included

• Installed 6/03

Dames Point Bridge – Jacksonville

• 4 receiver suite

• Other sensors under consideration

• Installation 1/04

Future Network Enhancements

Future Network Enhancements

Real Time Kinematic

Real Time Kinematic

TALLAHASSEE 2 2042050.497 574577.331 213.08 0

hawks grnd 8 2038751.133 565881.29 228.571 0.035

hawks grnd 22 2038711.196 565487.17 228.958 0.036

hawks grnd 25 2038921.207 565596.37 227.428 0.036

hawks grnd 31 2038746.127 565647.963 228.884 0.038

hawks grnd 36 2038842.749 565723.573 228.259 0.038

hawks grnd 50 2038854.264 565744.804 224.27 0.038

hawks grnd 7 2038713.4 565850.507 228.596 0.038

hawks grnd 13 2038729.026 565890.606 232.102 0.039

hawks grnd 16 2038670.755 565839.287 230.835 0.04

hawks grnd 23 2038777.71 565522.018 228.891 0.04

hawks grnd 34 2038850.711 565700.332 228.317 0.04

hawks grnd 37 2038839.302 565722.262 228.265 0.041

hawks grnd 12 2038770.246 565929.866 231.879 0.042

hawks grnd 24 2038856.659 565567.029 228.58 0.042

hawks grnd 4 2038655.476 565806.743 228.759 0.042

hawks grnd 41 2038832.459 565751.625 226.237 0.042

hawks grnd 5 2038655.478 565806.724 228.758 0.042

hawks grnd 14 2038702.411 565866.17 232.023 0.043

hawks grnd 27 2038817.838 565621.741 228.601 0.043

hawks grnd 51 2038932.625 565799.546 225.69 0.044

hawks grnd 33 2038800.677 565676.4 228.723 0.045

hawks grnd 43 2038800.026 565700.549 228.18 0.045

Mean 3D Position Quality .049 m

Future Network Enhancements

Multi Sensor Monitoring System

Bridge loading measurements, permanent deformation measurement, automatic observation of the bearing pads. Advantage: Flexible use of the total station for measurements with maximum precision in manual or automatic mode. Most importantly, the optical systems provide an independent check of the GPS measurements.

• Concept-to-Reality• All sites located.• Installations complete at 100% of core

locations.• Control Center is fully operational.• Additional installations in progress.• R&D of future enhancements to continue.• Inclusion into NGS CORS network.