Effects of anisotropic ionospheric irregularities in the residual error of dual-frequency GNSS measurements

摘要

This paper studies effects of random anisotropic ionospheric irregularities on the residual error of dual-frequency GNSS measurements. For this purpose, in the phase path equation we take into account second- and third-order corrections associated with geomagnetic effects and ray path bending in the presence of random irregularities respectively. We also examine the influence of the orientation of ionospheric irregularities along geomagnetic field lines (the so-called anisotropy of irregularities) on the third-order residual error of dual-frequency measurements. We simulate the residual error to investigate the conditions under which this effect becomes most significant.