Improving the Klobuchar Model Based on Beidou GEO Observations in Australia
School of Geodesy and Geomatics, Wuhan University, 129 Luoyu Road, Wuhan 430079,China
Abstract This paper provides a detailed analysis of the ionosphere using GEO satellites of China’s Beidou navigation satellite system. Taking Curtin University Beidou continuous observation station’s data as an example, the paper extensively analyzes the ionospheric TEC variations in a sample day in equinox, summer and winter, as well as seasonal variations in 2013 and 2014. In addition, based on the temporal variations in TEC, the paper improves the Klobuchar ionospheric model broadcast by GPS satellites. Finally, the effect of the improved model is validated using a year’s data. The paper shows that the accuracy of the new Klobuchar model is obviously superior to the former model. The precision of the new model increases more than 10% in most months, and it reaches over 64% in computing the ionosphere vertical TEC.
Received: 03 October 2014
Published: 01 December 2015
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