GPS SATELLITE NAVIGATION IN THE URBAN ENVIRONMENT. NAV 85 - LAND NAVIGATION AND LOCATION FOR MOBILE APPLICATIONS - PAPERS PRESENTED AT THE 1985 CONFERENCE OF THE ROYAL INSTITUTE OF NAVIGATION, YORK, 9-11 SEPTEMBER 1985

This article described experiments which evaluated an integrated global positioning system (gps)/dead reckoning system navstar, and provided suggestions for further improving the system. A small truck was equipped with a Texas instruments t1 4100 multiplexed gps receiver, a siemens land vehicle dead reckoning system, including a magnetic azimuth sensor and an odometer, a data collection unit, a power supply unit and an atomic clock. Measurements were based on different operational modes: (a) stationary measurements, where the vehicle was placed on a reference way point of known co-ordinates for collecting gps position data and for comparing them with the reference position; and (b) dynamic measurements, which were carried out on rectilinear streets, of which the beginning and end were marked by 2 reference way points. The test results obtained suffered from the relatively high gpod values of greater than 10 due to the bad configuration of the satellites. In cities, the blockage of satellite visibility by buildings was an important factor. The geometric conditions for future gps operation in urban areas was discussed, as were the constraints and requirements for an integrated gps/dead reckoning system. A concept for an improved system were suggested, including details about the gps receiver, the dead reckoning module and the integrated navigation module. (TRRL)

• Corporate Authors:

  Royal Institute of Navigation

  1 Kensington Gore
  London,   England 
• Authors:
  • Held, V
  • Kricke, K D
• Publication Date: 1985

Media Info

• Features: References;
• Pagination: 8 p.

Subject/Index Terms

• TRT Terms: Alignment; Artificial satellites; Automatic vehicle location; Conferences; Evaluation
• Uncontrolled Terms: Selection
• ITRD Terms: 2894: Alignment; 3882: Automatic; 8525: Conference; 9020: Evaluation (assessment); 9061: Location; 4016: Remote sensing; 9072: Selection; 1255: Vehicle
• Subject Areas: Highways; Planning and Forecasting;

Filing Info

• Accession Number: 00491618
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD, TRIS
• Created Date: Mar 31 1990 12:00AM