Ionospheric spatial correlation analysis for China area

Abstract

Ionospheric correlation models are needed for ionospheric grid-based augmentation system development and its rigorous integrity performance requirement. 0th and 1st order ionospheric correlation function was established for China area, and analyzed for various ionospheric conditions. It is shown that the ionospheric delay difference does not vary linearly with the distance, and the residual ionospheric error after the planar fitting of grid model is not a constant as well. These models are different from that of WAAS or EGNOS, which covers the middle latitude area. These China area ionosphere specific characteristics should be taken into account for the regional augmentation system development. © 2013 Springer-Verlag Berlin Heidelberg.