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Civil User Benefits of the Modernized Global Positioning System

Civil User Benefits of the Modernized Global Positioning System. Office of Space Commercialization U.S. Department of Commerce August 2000. Current Users: Basic to Mid-Range. Current Users: High End. Future Users. Basic Positioning: Before May 2000. C/A Code on L1 Selective Availability.

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Civil User Benefits of the Modernized Global Positioning System

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  1. Civil User Benefits of the Modernized Global Positioning System Office of Space CommercializationU.S. Department of Commerce August 2000

  2. Current Users:Basic to Mid-Range Current Users:High End Future Users

  3. Basic Positioning: Before May 2000 • C/A Code on L1 • Selective Availability 25-100 m

  4. Basic Positioning: Today • C/A Code on L1 • No Selective Availability 10-20 m

  5. Basic Positioning: By 2009 • C/A Code on L1 • C/A Code on L2 5-10 m

  6. Basic Positioning: By 2013 • C/A Code on L1 • C/A Code on L2 • New Code on L5 Better resistance to interference 1-5 m

  7. Cost of Higher Precision GPS Will Drop Dramatically • Basic GPS will replace DGPS for many applications, eliminating cost of: • DGPS receivers • Commercial DGPS base stations • Commercial DGPS services • Volume of receiver sales will surge, leading to lower unit costs • DGPS/NDGPS integrity monitoring will still be required for safety-of-life navigation systems

  8. Examples of Higher Precision Applications Intelligent VehicleSystems Fleet Management Mineral & Resource Exploration Public Safety& Services Positive TrainControl

  9. Current Users:Basic to Mid-Range Current Users:High End Future Users

  10. Real-Time Kinematic: Today • L1 Code and Carrier • L2 Carrier • Data Link 10 km 2 cm accuracy

  11. Real-Time Kinematic: Tomorrow • L1 Code and Carrier • L2 Code and Carrier • L5 Code and Carrier • Data Link Faster recovery following signal interruptions (ex., under bridges) 100+ km 2 cm accuracy

  12. Cost of RTK Will Drop Dramatically • Increased RTK range means fewer base stations will be needed • DGPS/NDGPS reference stations could conceivably be converted to RTK stations, enabling free, nationwide RTK • Increased volume of sales will lower unit cost of RTK systems • Commercial RTK base stations will still be required for some applications

  13. Examples of RTK Applications Survey, Mapping, GIS Open Pit Mining Precision Agriculture Construction

  14. Increased Range of RTK Will Enable Its Use in New Places • Marine surveys will be possible at greater distances from the shore

  15. Current Users:Basic to Mid-Range Current Users:High End Future Users

  16. Improved Accuracy of Basic GPS Will Enable New Applications • Small size of standalone receivers will allow GPS to be used where DGPS is not practical • Handheld navigation for the blind • Animal tracking • Tracking of children, elderly • The public craves higher GPS accuracy and will certainly develop creative new uses for it GPS in a golf ball?

  17. Better Signal & Protection of L5 Will Enable New Navigation Capabilities Aviation Maritime Space Transportation

  18. Availability of Three Signals Will Enable New Scientific Techniques Space-Based Atmospheric Studies Ocean Surface Mapping via GPS Reflection New Uses of Very High Precision Timing

  19. Conclusion • Cost of existing high precision GPS and RTK applications will drop dramatically • Volume of existing applications will increase • Many new applications will be enabled • User benefits of GPS modernization are clear, though hard to quantify economically

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