Federal Nationwide Differential Global Railroad Administration Positioning System Leonard W. Allen III Acting Chief Track and Infrastructure Division Office of Research and Development Federal Railroad Administration Presented to: Russian Plenary Session GPS - Glonass December 2005 Nationwide Differential Global Positioning System (NDGPS) 1
Differential GPS (DGPS) Federal Railroad Administration . Reference Station December 2005 Nationwide Differential Global Positioning System (NDGPS) 2
Nationwide Differential Global Positioning System Expanding the Coast Guard’s DGPS into the Nationwide DGPS Nationwide Differential Global Positioning System (NDGPS) 3
Federal Railroad Administration Current NDGPS Coverage GWEN Klamath Falls OR Funded Completion 2005 -2006 December 2005 M to G Mequon WI Gooding Idaho GWEN Essex CA New Poplar Bluff MO New Big Lake TX New Marshall TX New St. Marys New. WV Dandridge GWENTN Bobo MS Approximately 92% of the lower 48 states has single coverage and Nationwide Differential Global Positioning System (NDGPS) 4 60% has dual coverage.
International Standard u NDGPS is designed to an international, non-proprietary standard n n n u u u Federal Railroad Administration Compliant with RTCM SC-104 and ITU-R M. 823 Increases market for manufacturers Enhances Global interoperability Signal is free to all users 50 other countries operate compatible systems Resulting in a seamless international navigation system December 2005 Nationwide Differential Global Positioning System (NDGPS) 5
Acceptance of the international standard is leading to a seamless worldwide service. Nationwide Differential Global Positioning System (NDGPS) 6
Nationwide Differential Global Positioning System (NDGPS) Applications December 2005 Nationwide Differential Global Positioning System (NDGPS) Federal Railroad Administration 7
Five Categories of NDGPS Applications Categories of Applications 1. Original Code-Based NDGPS Applications Provides 1 - 3 meters Navigation, Precision Farming, Positive Train Control, Dredging, Buoy Positioning, Resource Management & GIS 2. Real-Time High Accuracy NDGPS Apps 10 -15 centimeters Real-time Automated Surveying of Roads, Railroads & Harbors; Highway Lane Keeping; Machinery Control; & Auto-Docking of Ships 3. Post-Processing NDGPS Applications 1 - 3 centimeters Very Accurate Surveying, Mapping, & Hydrography 4. Stationary Scientific NDGPS Applications 2 - 3 millimeters Plate Tectonics Monitoring & Earthquake Prediction Nationwide Differential Global 8 5. Weather Forecasting Application. Positioning System (NDGPS) Water Vapor Info
High Accuracy NDGPS Program Objectives Federal Railroad Administration u Develop a nationwide 3 -D dynamic positioning service that has an accuracy of less than 15 centimeter and time to alarm integrity of less than 2 seconds u Coexist with existing NDGPS infrastructure u Do not degrade existing NDGPS u Minimize deployment costs December 2005 Nationwide Differential Global Positioning System (NDGPS) 9
Broadcast Site Configuration REFERENCE STATION OBSERVABLES DATA Federal Railroad Administration MODULATOR FORMATTER DSP/Analog Card CORRECTIONS Rack Mount PC TRANSMITTER NDGPS DIPLEXER NDGPS & HA NDGPS TO ANTENNA TRANSMITTER HIGH ACCURACY NDGPS December 2005 Nationwide Differential Global Positioning System (NDGPS) 10
High Accuracy NDGPS Federal Railroad Administration 10 -15 centimeters at 150 miles December 2005 Nationwide Differential Global Positioning System (NDGPS) on a dynamic platform (boat). 11
Development of High Accuracy DGPS International Standard u u u Federal Railroad Administration The United Kingdom, Germany and Japan have expressed an interest in working with the US on an international standard for High Accuracy DGPS. Russia is a major user of DGPS. The combination of Russia, Europe, Japan and U. S. represents about 90% of the world DGPS users. Does Russia want to work with the UK, Japan, Germany and U. S. on development of an international standard for High Accuracy Differential GPS? If so, I need contact information on Russia’s point of contact. December 2005 Nationwide Differential Global Positioning System (NDGPS) 12
Nationwide Differential Global Positioning System Federal Railroad Administration Len Allen Acting Chief Track and Infrastructure Division Office of Research & Development Phone: (202) 493 -6329 Fax: (202) 493 -6333 Leonard. Allen@fra. dot. gov Web: www. fra. dot. gov December 2005 Federal Railroad Administration Office of R&D, Mail Stop 20 1120 Vermont Ave. N. W. Washington, DC 20590 Nationwide Differential Global Positioning System (NDGPS) 13
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