Performance Analysis of NTCM Ionospheric Broadcast Models

The performance of NTCM -BC model, MNTCM -BC model, NTCM -Klobuchar model and traditional Klobuchar model are compared and analyzed. The results show that:In a solar cycle, the accuracy of the vertical total electron content calculated by the NTCM-BC model and MNTCM-BC model is consistent and the highest, followed by the NTCM -Klobuchar model and the Klobuchar model is the lowest. At low-latitude stations, the NTCM models can reduce the error about 20 TECU compared with the Klobuchar model at most. In comparison to use the Klobuchar model, the single point positioning using NTCM-BC and MNTCM-BC model can improve the height accuracy of about 38%, especially at low-latitude stations, the maximum can be reduced by about 3 m.