The influence of different-scale ionospheric irregularities on the residual error of the satellite navigation system

We investigate the influence of an inhomogeneous ionosphere on the accuracy of the dual frequency satellite navigation system. The geomagnetic field, and ray bending in the background large-scale inhomogeneous ionosphere and in small-scale random irregularities are taken into account. It is shown that the contribution from the background irregularity for moderate values of total electron content (TEC) is less than the contribution from the geomagnetic field and random irregularities. The contribution to the residual error made by radio wave diffraction from small-scale random irregularities is as small.