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Improving DGPS Accuracy by Considering the Correlation of Pseudorange Correction and Satellite Elevation Angle

Published online by Cambridge University Press:  22 June 2017

Sang-Hyeon Kim  and
Kwan-Dong Park
Sang-Hyeon Kim
Affiliation:
(Department of Geoinformatic Engineering, Inha University, South Korea)
Kwan-Dong Park*
Affiliation:
(Department of Geoinformatic Engineering, Inha University, South Korea)
*
(E-mail: kdpark@inha.ac.kr)
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Abstract

One of the limitations of Differential Global Positioning Systems (DGPS) is that accuracy decreases as the distance between the user and a base station increases. We have developed a new DGPS positioning strategy that is less affected by baseline length and enables better accuracy. We found correlations between satellite elevation angle and Pseudo-Range Correction (PRC) through extensive tests. As a result, better PRC values were obtained by considering differences in satellite elevation angles at a reference site and the user location. We tested the model for a variety of baseline lengths greater than 250 km, and the positioning accuracy improved by 29–66% compared with traditional DGPS based on a single reference station. Positioning accuracies comparable to those of multi-reference DGPS were achieved in some cases.

Keywords

GPSDGPSPseudo-Range CorrectionElevation Angle
Type
Research Article
Information
The Journal of Navigation , Volume 70 , Issue 6 , November 2017 , pp. 1267 - 1275
Copyright
Copyright © The Royal Institute of Navigation 2017 

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