NDLI: Real time differential GPS and GLONASS vehicle positioning in urban areas

Content Provider	IEEE Xplore Digital Library
Author	Walsh, D. Capaccio, S. Lowe, D. Daly, P. Shardlow, P. Johnston, G.
Copyright Year	1998
Description	Author affiliation: CAA Inst. of Satellite Navigation, Leeds Univ., UK (Walsh, D.)
Abstract	This paper describes a research programme carried out by the Institute of Satellite Positioning (ISN) and Racal Survey Ltd. to examine the performance of differential positioning using both the GPS and satellite systems for vehicles. The work involved developing a differential GNSS positioning system for a vehicle using GNSS receivers developed by the ISN and Ashtech and using Racal's Landstar differential system. The programme has involved extensive real-time vehicle positioning trials in urban areas. Two aspects of vehicle positioning performance have been concentrated on, (i) fix density, and (ii) positioning accuracy. The results show that combining GPS and GLONASS significantly improves both stand-alone and differential positioning accuracy compared to using just GPS alone. The results also show that combined GNSS supports a greater differential correction age without the same accuracy degradation that GPS exhibits. This, in turn, increases the GNSS fix density. Even with the same correction age, GNSS has 10% fix density improvement. This increase in fix density will allow improved vehicle positioning in an in-car navigation system with a lower level of augmentation with other sensors.
Starting Page	514
Ending Page	519
File Size	675413
Page Count	6
File Format	PDF
ISBN	0780342690
DOI	10.1109/ITSC.1997.660527
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-11-12
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Global Positioning System Vehicles Urban areas Satellite navigation systems System testing Degradation Sensor systems Extraterrestrial measurements Position measurement Real time systems
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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