THE FEASIBILITY OF APPLYING THE ACTIVE TVTIME SYSTEM TO AUTOMATIC VEHICLE LOCATION
The National Bureau of Standards Boulder laboratory has studied the use of television as a carrier for accurate time and frequency signals. The usefulness of the TvTime System applied to locating cars and other vehicles automatically is examined. Such a need exists in transit, police, taxi, utility and many commercial fleets. Past approaches to the problem are outlined. The NBS TvTime System and experimental results are discussed. Two models of a car locating system are outlined, each having three parts: (1) a TV decoder in the car, (2) a radio link such as a mobile channel between car and central dispatch, and (3) a computer which determines the car's position. Results show that this system is capable of achieving a location accuracy of better than 60 m with 95 percent confidence. Some advantages and limitations of the system are discussed and cost estimates for the equipment are given.
- Pub. in Jnl. Inst. Navigation 21, n1 p9-15 Spring 1974.
National Bureau of StandardsGaithersburg, MD USA
- HOWE, D A
- Publication Date: 1974
- Pagination: 7 p.
- TRT Terms: Automatic tracking; Broadcasting; Feasibility analysis; Frequency modulation; Ground vehicles; Position fixing; Radio links; Television; Time signals
- Old TRIS Terms: Carrier waves; Position finding
- Subject Areas: Operations and Traffic Management; Public Transportation; Vehicles and Equipment;
- Accession Number: 00169628
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: NBS2730117
- Files: TRIS
- Created Date: Mar 14 2002 12:00AM