Enhancing The Accuracy of GPS Point Positioning by Modeling the Ionospheric Propagation Delay

Abubakr Albashir, Kamal Abdellatif Sami, Mohammed Ahmedeltigani
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引用次数: 3

Abstract

The ionospheric propagation delay is one of the major error sources in GPS positioning. This effect is as a result of the fact that the GPS signals are affected by the ionized layer of the ionosphere. Subsequently, the signal reception time will be delayed, which causes an increase in the measured pseudo-ranges and phase measurements of GPS observables.In this paper the linear combination observables technique was used to estimate the ionospheric propagation delay effect on the measured pseudo-ranges and GPS point positioning. The use of the free linear combination technique was found to reduce the ionospheric propagation effects significantly.
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利用电离层传播延迟模型提高GPS点定位精度
电离层传播延迟是GPS定位的主要误差源之一。这种效应是由于GPS信号受到电离层电离层的影响。随后,信号接收时间会延迟,导致GPS观测值的伪距离和相位测量值增加。本文利用线性组合观测值技术估计电离层传播延迟对测量伪距离和GPS点定位的影响。使用自由线性组合技术可以显著降低电离层传播效应。
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