One of the largest propagation error is the ionosphere delay. In this paper, the ionospheric effect on the measurement of QZSS and BeiDou will be discussed. We also analyze the positioning error using the usual ionosphere delay correction method such as Klobuchar model, the ionosphere-free technique, and TEC estimation. As the result, the effects of each method depend on the latitude of the receiver position.

Keywords: ionosphere, positioning error, QZSS, BeiDou