High Accuracy Global Positioning System Tests: Phase I

Federal Railroad Administration2021PDFTech ReportWolgram, Travis RAllen, LeonardTransportation Technology Center, Inc.United States. Department of Transportation. Federal Railroad Administration. Office of Research, Development and TechnologyUnited States. Department of Transportation. Federal Railroad AdministrationUnited StatesEquipment testsGlobal Positioning SystemAccuracyRailroadsPositive train controlHigh Accuracy Global Positioning SystemHA-GPSGPSbase stationNationwide Differential Global Positioning SystemNDGPSPositive Train ControlPTCVital Positive Train ControlVPTCDGPSDOT/FRA/ORD-21/19DTFR 53-00-0012, Task Order 258Allen, Len; Omar, TarekTechnical Report April 2011Transportation Technology Center, Inc. (TTCI) constructed a prototype High Accuracy Global Positioning System (HA-GPS) base station at the Transportation Technology Center (TTC) under contract by the Federal Railroad Administration (FRA) to broadcast carrier code and phase measurement data at 1 kilowatt and 458 kilohertz to remote users to obtain sub decimeter real time kinematic GPS positional solutions within a 200-nautical mile radius. The operation and accuracy of the solution obtained via HA-GPS was successfully tested under a variety of conditions related to railroad operations.119