Nationwide DGPSProject Status

Presentation to CGSIC

43nd MeetingMarch 10, 2003

CAPT Curtis Dubay

U.S. Coast Guard

CGSIC March, 2004 2

OVERVIEW

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

Nationwide Differential Global Positioning System (NDGPS)

Nationwide Differential Global Positioning System (NDGPS)

Five Categories of ApplicationsFive Categories of Applications ProvidesProvides

1. Original Code-Based NDGPS Applications 1. Original Code-Based NDGPS Applications 1 - 3 meters1 - 3 metersNavigation, Precision Farming, Resource Management, Navigation, Precision Farming, Resource Management,

Dredging, Buoy Positioning, Positive Train Control, Dredging, Buoy Positioning, Positive Train Control,

Emergency Response & GIS Emergency Response & GIS

2. Post-Processing NDGPS Applications2. Post-Processing NDGPS Applications 2 - 5 centimeters2 - 5 centimetersSurveying, Mapping, Charting & HydrographySurveying, Mapping, Charting & Hydrography

3. Stationary Scientific NDGPS Applications3. Stationary Scientific NDGPS Applications 2 - 3 millimeters 2 - 3 millimeters Plate Tectonics Monitoring & Earthquake PredictionPlate Tectonics Monitoring & Earthquake Prediction

4. High Accuracy NDGPS Applications4. High Accuracy NDGPS Applications 10 - 15 centimeters10 - 15 centimetersReal-time Automated Surveying of Roadways, Railways Real-time Automated Surveying of Roadways, Railways

& Harbors; Highway Lane Keeping; Machinery Control& Harbors; Highway Lane Keeping; Machinery Control

5. Weather Forecasting Application5. Weather Forecasting Application Continuous Continuous measurement measurement of water vapor in theof water vapor in the

atmosphereatmosphere

Five Categories of ApplicationsFive Categories of Applications ProvidesProvides

1. Original Code-Based NDGPS Applications 1. Original Code-Based NDGPS Applications 1 - 3 meters1 - 3 metersNavigation, Precision Farming, Resource Management, Navigation, Precision Farming, Resource Management,

Dredging, Buoy Positioning, Positive Train Control, Dredging, Buoy Positioning, Positive Train Control,

Emergency Response & GIS Emergency Response & GIS

2. Post-Processing NDGPS Applications2. Post-Processing NDGPS Applications 2 - 5 centimeters2 - 5 centimetersSurveying, Mapping, Charting & HydrographySurveying, Mapping, Charting & Hydrography

3. Stationary Scientific NDGPS Applications3. Stationary Scientific NDGPS Applications 2 - 3 millimeters 2 - 3 millimeters Plate Tectonics Monitoring & Earthquake PredictionPlate Tectonics Monitoring & Earthquake Prediction

4. High Accuracy NDGPS Applications4. High Accuracy NDGPS Applications 10 - 15 centimeters10 - 15 centimetersReal-time Automated Surveying of Roadways, Railways Real-time Automated Surveying of Roadways, Railways

& Harbors; Highway Lane Keeping; Machinery Control& Harbors; Highway Lane Keeping; Machinery Control

5. Weather Forecasting Application5. Weather Forecasting Application Continuous Continuous measurement measurement of water vapor in theof water vapor in the

atmosphereatmosphere

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Coverage (September 2002)

Coverage March 2003

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Current Coverage (September 2003)

Coverage March 2004

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Projected Coverage FundedProjected Coverage (December 2003)

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Current Status

• NDGPS Expansion is progressing.

• Currently 81 sites are operational.

• Continue to fill coverage gaps.

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Current Status (cont’d)

• 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.

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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 O&M costs are around $3.3M

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• 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)

NDGPS Funding History

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• 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)

NDGPS Funding History (con’t)

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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

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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.htm

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NDGPS Issues

• Convening the NDGPS Executive Steering Council (NESC)

• Maintaining a stable source of funding

• New sites will require addition design and construction effort

Nationwide DGPSProject Status

Presentation to CGSIC

43nd MeetingMarch 10, 2003

CAPT Curtis Dubay

U.S. Coast Guard