Examining quality of DGPS-derived positioning data in urban road networks

Author

Cheu, Ruey-Long ; Chiang, Pamela A. ; Wee, Sim Ho

Author_Institution

Dept. of Civil Eng., Nat. Univ. of Singapore, Singapore

fYear

2002

fDate

2002

Firstpage

938

Lastpage

943

Abstract

The differential global positioning system (DGPS) has been and will be used in several large-scale intelligent transportation systems projects in Singapore. This paper examines the availability and reliability of DGPS signal data in all the expressways, and two selected arterials, one bounded by tall residential apartment blocks and another parallel to an elevated mass rapid transit viaduct. The signal availability is measured by coverage, while the reliability is quantified by horizontal dilution of precision (HDOP). The transverse positioning errors are within sub-lane width accuracy on at least 94% of the expressways, and 95% of the arterials. The relationship between HDOP and critical angle for satellite view is also modeled.

Keywords

Global Positioning System; automated highways; quality of service; radionavigation; traffic engineering computing; transportation; GPS; Singapore; differential Global Positioning System; differential corrections; horizontal dilution of precision; intelligent transportation systems; mass rapid transit; positioning error; signal availability; signal coverage; vehicle navigation; Availability; Base stations; Clocks; Error correction; Global Positioning System; Intelligent networks; Large-scale systems; Satellite broadcasting; Transportation; Vehicles;

fLanguage

English

Publisher

ieee

Conference_Titel

Intelligent Transportation Systems, 2002. Proceedings. The IEEE 5th International Conference on

Print_ISBN

0-7803-7389-8

Type

conf

DOI

10.1109/ITSC.2002.1041346

Filename

1041346