GPS Augmentations and Applications Workshop on the Applications of Global Navigation Satellite Systems Dubai, United Arab Emirates 16-20 January 2011 Jeffrey.

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Presentation transcript:

GPS Augmentations and Applications Workshop on the Applications of Global Navigation Satellite Systems Dubai, United Arab Emirates January 2011 Jeffrey Auerbach GNSS Policy Advisor Office of Space and Advanced Technology U.S. Department of State

Dubai GNSS Applications Workshop – January 2011 Overview GPS Interface Specifications & Performance Standards U.S. Augmentations to GPS NDGPS CORS GDGPS & TASS GBAS SBAS/WAAS Increased Accuracy with Augmentation 2

Dubai GNSS Applications Workshop – January 2011 Public Interface Specifications Current versions of the public GPS Signal-in-Space (SIS) Interface Specifications: –IS-GPS-200 – L1 (P(Y), C/A), L2 (P(Y), L2C) –IS-GPS-705 – L5 –IS-GPS-800 – L1C These and other key IS/ICD documents available at: – –

Dubai GNSS Applications Workshop – January 2011 Future Performance Standard Updates Planning a draft update of the SPS PS in 2011 –Addition of L2C signal to current L1 C/A signal –Same performance values –Update to be approved before Initial Operational Capability (IOC) declaration for L2C Planning subsequent draft updates for L5 & L1C signals –Prior to each subsequent IOC declaration Developing an updated set of performance metrics –Include different user applications and terrain environments 4

Dubai GNSS Applications Workshop – January 2011 Nationwide Differential GPS (NDGPS) Operated/managed by U.S. Coast Guard as a Combined NDGPS –Includes Maritime + Department of Transportation + Army Corps of Engineers sites System Specifications –Corrections broadcast at 285 and 325 kHz using Minimum Shift Keying (MSK) modulation –Real-time differential GPS corrections provided in Radio Technical Commission for Maritime Services (RTCM) SC-104 format –No data encryption –Real-time differential corrections for mobile and static applications More than 92% of Continental U.S. has single coverage More than 65% of Continental U.S. has dual coverage 5

Dubai GNSS Applications Workshop – January 2011 Nationwide Differential GPS Expansion of maritime differential GPS (DGPS) network to cover terrestrial United States Built to international standard adopted in 50+ countries 6

Dubai GNSS Applications Workshop – January 2011 Transportation –Maritime U.S. Coast Guard Aids to Navigation Positioning and maritime navigation –Traffic congestion –Baseline reference for railroads –Used by U.S. Federal Highway Administration Roadside management Survey, construction, quality, asset management Other Uses –Federal-Aid Program –Law Enforcement –Resource Management NDGPS Capabilities and Uses 7 –Environmental and Geological Monitoring –U.S. Army Corp of Engineers Surveying and Dredging operations

Dubai GNSS Applications Workshop – January 2011 National Continuously Operating Reference Stations (CORS) Enables highly accurate, 3-D positioning –Centimeter level accuracy via post processing –Tied to National Spatial Reference System 1,450+ sites operated by 200+ public, private, academic organizations NOAA’s Online Positioning User Service (OPUS) automatically processes coordinates submitted via the web from around the world OPUS-RS (Rapid Static) declared operational in 2007 NOAA considering support for real-time networks 8

Dubai GNSS Applications Workshop – January 2011 Primary application is to enable accurate positioning relative to the National Spatial Reference System Other applications include earth and scientific research –Monitoring earth tectonic motion –Sea level change –Atmospheric studies –Aerial mapping CORS Applications 9

Dubai GNSS Applications Workshop – January 2011 U.S. GPS Augmentation Programs Designed for Aviation 10 GBAS

Dubai GNSS Applications Workshop – January 2011 Architecture –Ground Station/Processing Unit/Power Supply (one shelter on airport property) –4 Reference Receivers/Antennas –VHF Data Link Antenna Specifications –Supports Category I approach with growth to Category III –Single facility can provide service up to 23 mile radius 11 Ground Based Augmentation System (GBAS)

Dubai GNSS Applications Workshop – January 2011 Ground Based Augmentation System (GBAS) Aviation Capabilities Precision approach for ILS Category - I, II, III approaches Multiple runway coverage at an airport 3D RNP procedures (can be supported by multiple navigation sources) Continuous Descent Arrivals (CDA) Navigation for closely spaced parallel runways Designed for aviation use 12

Dubai GNSS Applications Workshop – January 2011 GBAS Category I Implementation Operational Implementation –GBAS implementation at Newark Straight in procedures developed Airspace Simulations in progress for other scenarios Flight Inspection 2010 / First Flight TBD Continental Airlines taking delivery of GBAS capable 737NG ISSUES –RFI issues on L1 – FAA Spectrum investigating –NOTAM to address non-availability –GBAS implementation Houston Memphis GBAS will be relocated to Houston Houston as an additional airport to establish city pair for Continental 13

Dubai GNSS Applications Workshop – January 2011 GBAS Category II/III Acquisition Planning Drafting/updating required documents according to FAA Acquisition Management System –Single Competitive Contract Award for Development and Production options –CAT I/II/III GBAS ground facility –Low Rate Initial Production (LRIP) beginning around 2015 (IOC) –10-12 installations per year, up to 90 installations –20 year life-cycle ~2034 Next Milestones –Investment Analysis Readiness Decision – September 2011 –Initial Investment Decision – March 2012 –Final Investment Decision – September

Dubai GNSS Applications Workshop – January 2011 GBAS International Activities International GBAS Working Group (IGWG) –Last working group hosted by EUROCONTROL June 3-6, 2010 in Brussels, Belgium –Service providers starting transition from research to implementation of GBAS –Major topics of interest/cooperation – Coordination of worldwide Ionospheric activities – Post Implementation activities – Future applications/CAT II/III CONOPS GBAS in SESAR (Single European Sky ATM Research) –SESAR budget includes substantial budgets for GBAS R&D FAA supporting international ANSP requests for GBAS technical support –Australia, Brazil, Germany, Spain, Chile, India, China, Colombia 15

Dubai GNSS Applications Workshop – January 2011 GBAS Usage Current airlines GBAS equipped –Continental, Delta Airlines, Qantas, Air Berlin, TuiFly, Sonair, Air Vanuatu, Emirates More than 15 countries have active GBAS programs 16 Installed Planned S-CAT I

Dubai GNSS Applications Workshop – January 2011 Wide Area Augmentation System (WAAS) Satellite Based Augmentation System (SBAS) Designed for aviation use, but available and used by many GPS users today Localizer Performance with Vertical Guidance (LPV)-200 approach is comparable to ILS Category I 17

Dubai GNSS Applications Workshop – January Wide Area Augmentation System (WAAS) Architecture 38 Reference Stations 3 Master Stations 6 Ground Earth Stations 3 Geostationary Satellite Links 2 Operational Control Centers

Dubai GNSS Applications Workshop – January 2011 WAAS Geo Satellites 19 WAAS GEOs (CRE and AMR) Currently Operating CRW turned OFF in December 2010 –Performance deemed inadequate for WAAS service use –Total loss of T&C April 2010 resulted in uncontrolled easterly drift CRW recovery efforts initiated 24 December 2010 –Satellite units undergoing test & evaluation –Projected possible return to WAAS service in Spring 2011 Potential alternative would utilize former WAAS GEO (POR) to mitigate loss of service in Alaska

Dubai GNSS Applications Workshop – January 2011 WAAS Availability 20

Dubai GNSS Applications Workshop – January 2011 WAAS Phased Upgrades 21 Phase I: IOC (July 2003) Completed –Provided LNAV/VNAV/Limited LPV Capability Phase II: Full LPV (FLP) (2003 – 2008) Completed –Improved LPV availability in CONUS and Alaska –Expanded WAAS coverage to Mexico and Canada Phase III: Full LPV-200 Performance (2009 – 2013) –Software enhancements, hardware upgrades –Steady state operations and maintenance –Transition to FAA performed 2nd level engineering support –Begin GPS L5 transition activities Phase IV: Dual Frequency (L1,L5) Operations (2013 – 2028) –Complete GPS L5 transition –Will significantly improve availability and continuity during severe solar activity –Provide additional protection against GPS interference –Will continue to support single frequency users

Dubai GNSS Applications Workshop – January 2011 Airports with WAAS LPV Approach As of 18 November ,341 LPVs serving 1231 Airports - 1,449 LPVs to non-ILS Runways LPVs to ILS runways LPVs to Non-ILS Airports 22

Dubai GNSS Applications Workshop – January 2011 WAAS/SBAS Aviation Benefits Increased Runway Access More direct en route flight paths New precision approach services Reduced and simplified equipment on board aircraft Potential elimination of some ground-based navigation aids (NDB, VOR, ILS) can provide a cost saving to air navigation service provider 23

Dubai GNSS Applications Workshop – January 2011 Accuracy with Augmentation 24

Dubai GNSS Applications Workshop – January 2011 GPS/WAAS Aviation Performance 25 * Use of GPS vertical not authorized for aviation without augmentation (SBAS or GBAS) WAAS Performance evaluated based on a total of 1,761 million samples (or 20,389 user days) GPS Standard GPS Actual WAAS LPV-200 Standard WAAS Actual Horizontal 95%36 m2.74 m16 m1.08 m Vertical 95%77 m*3.89 m4 m1.26 m

Dubai GNSS Applications Workshop – January 2011 Precision with Augmentation 26 NavCom/Starfire Receiver –20 cm horizontal accuracy –30 cm vertical accuracy Global Satellite Based Augmentation System (GSBAS) Technology developed by NASA’s Jet Propulsion Laboratory

Dubai GNSS Applications Workshop – January 2011 Summary GPS Interface Documents are available on the Internet Plans in work for update to GPS Performance Standard NDGPS and CORS augmentation systems allow for a range of services free of charge to users throughout the service area GBAS continues progress toward providing advanced aviation capabilities –Ultimate goal is to provide Category III precision approach WAAS upgrades/system improvements occurring in phases –On schedule for Full LPV-200 Performance in

Dubai GNSS Applications Workshop – January Contact Information Jeffrey Auerbach GNSS Policy Advisor Office of Space and Advanced Technology U.S. Department of State OES/SAT, SA-23, Suite 410 Washington, D.C (office) ‏