Implementation of Ionospheric error correction with Klobuchar model for GPS Location

  • Mohini Ghotekar et al.

Abstract

Global Positioning System (GPS) receivers do not accurately compensate for the ionospheric delay imposed upon a GPS signal. They rely upon models to compensate for the ionosphere. This delay compensation can be improved by measuring it directly with a dual-frequency receiver, or by monitoring the ionosphere using real-time maps. Klobuchar, Ne-Quick models and other models are used to calculate the ionosphere delay. In this proposed system we used Klobuchar model, Ne-Quick and Ray tracing algorithm. The models calculate the delay but due to perturbed situations in ionosphere layer the estimations are not that precise, like for low and mid-latitudes the Klobuchar model usually underestimates ionospheric delay, while for the high latitudes the ionosphere delay is overestimated. An algorithm named as Ray tracing algorithm will be used which provides the group delay measurement on the basis of variations of electron density in ionosphere layer. A method is proposed which includes, the ray tracing algorithm integrated with Klobuchar model is expected to compute the precise ionosphere delay and reduce to some extent. In proposed system GPS error reduce by Ionospheric error correction method.

Published
2019-11-15
Section
Articles