Nationwide DGPS Project Status

1
Nationwide DGPSProject Status

• Presentation to CGSIC43nd Meeting
• March 10, 2003
• s s s s s s s s s s s s s s s s
• CAPT Curtis Dubay
• U.S. Coast Guard

2
OVERVIEW

• Project Progress
• Funding Status
• Potential System Improvements
• Issues

3
Nationwide Differential Global Positioning System
(NDGPS)
Five Categories of Applications Provides 1.
Original Code-Based NDGPS Applications 1 - 3
meters Navigation, Precision Farming, Resource
Management, Dredging, Buoy Positioning, Positive
Train Control, Emergency Response GIS 2.
Post-Processing NDGPS Applications 2 - 5
centimeters Surveying, Mapping, Charting
Hydrography 3. Stationary Scientific NDGPS
Applications 2 - 3 millimeters Plate Tectonics
Monitoring Earthquake Prediction 4. High
Accuracy NDGPS Applications 10 - 15
centimeters Real-time Automated Surveying of
Roadways, Railways Harbors Highway Lane
Keeping Machinery Control 5. Weather
Forecasting Application Continuous measurement
of water vapor in the atmosphere
4
Coverage March 2003
Coverage (September 2002)
5
Coverage March 2004
Current Coverage (September 2003)
6
Projected Coverage Funded
Projected Coverage (December 2003)
7
Current Status

• NDGPS Expansion is progressing.
• Currently 81 sites are operational.
• Continue to fill coverage gaps.

8
Current Status (contd)

• Single-station coverage now at 87 of the CONUS.
• Dual-station coverage currently 55.
• Eight sites under development.
• Single coverage, nation-wide, should be achieved
  by the end of 2005 with the addition of 9 more
  sites.

9
Complete Dual Coverage Requirement

• 25M to complete CONUS dual coverage Alaska
  rail corridor coverage. - Total of 28 more
  sites in CONUS AK
• 22.5M to complete single coverage of Alaska
  - Total of 15 more sites in AK
• 8M for annual operations maintenance
• Current annual OM costs are around 3.3M

10
NDGPS Funding History

• FY1998 -- 2.4M (in Coast Guard
  appropriation)
• FY1999 -- 7.2M requested by FRA
• 5.5M (in Coast Guard appropriation)
• FY2000 -- 10.4M requested by FRA
• 5.0M (in FHWA appropriation)
• FY2001 -- 18.7M requested by FRA
• 6.0M (in FAA appropriation)

11
NDGPS Funding History (cont)

• FY2002 -- 20.5M requested by FRA
• 6.0M (in FHWA appropriation)
• FY2003 -- 32.1 Requested by FRA
• 6.0M (in FAA appropriation)
• FY2004 -- 27.0M requested by FRA
• 5.8M (in FRA appropriation)

12
Potential System Improvements

• Improve performance ... address the needs of
  governments and public
• Higher accuracy, at the 10-20 cm level
• Utilize additional available bandwidth for
  safety or public service applications

13
High Accuracy NDGPS

• Enable 3-D Dynamic Positioning at the Centimeter
  Level throughout the NDGPS Network
• Coexist with the current NDGPS Broadcast
• Minimize the incremental cost of adding High
  Accuracy NDGPS to NDGPS Sites
• Utilize existing broadcast antenna, reference
  stations, and site infrastructure
• Incremental Cost 90K/ Site
• The Phase I HANDGPS Report is available
  at www.tfhrc.gov/its/ndgps/02110/index.h
  tm

14
NDGPS Issues

• Convening the NDGPS Executive Steering Council
  (NESC)
• Maintaining a stable source of funding
• New sites will require addition design and
  construction effort

15
Nationwide DGPSProject Status

• Presentation to CGSIC43nd Meeting
• March 10, 2003
• s s s s s s s s s s s s s s s s
• CAPT Curtis Dubay
• U.S. Coast Guard