A Comparison of Accuracy Using a GPS and a Low-Cost DGPS

Author

Matosevic, Mladen ; Salcic, Zoran ; Berber, Stevan

Author_Institution

Dept. of Electr. & Comput. Eng., Auckland Univ.

Volume

55

Issue

5

fYear

2006

Firstpage

1677

Lastpage

1683

Abstract

After the cancellation of selective availability in May 2000, the accuracy of plain uncorrected global positioning systems (GPSs) is significantly increased. Currently, the main cause of error in plain GPS receivers is imperfect compensation of the ionospheric error. Tests performed in New Zealand show that even a simple code range differential GPS (DGPS) provides significant improvement in accuracy over a plain GPS and can be implemented using low-cost off-the-shelf equipment. A simple statistical model of positioning error estimation is developed and applied on data obtained by measurements in order to verify the findings. The method, which needs only position information without satellite constellation, provides sufficient accuracy when simultaneously gathered plain GPS and DGPS data are compared

Keywords

Global Positioning System; error compensation; position measurement; statistical analysis; GPS receivers; accuracy; differential GPS; global positioning systems; ionospheric error; low-cost off-the-shelf equipment; position information; positioning error estimation; satellite constellation; selective availability; statistical model; Availability; Communication standards; Error analysis; Global Positioning System; Performance evaluation; Position measurement; Radio link; Receivers; Satellite constellations; System testing; Differential global positioning system (DGPS); global positioning system (GPS); low-cost DGPS; positioning error; selective availability (S/A);

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2006.880918

Filename

1703916