Fig. 18From: Double-thin-shell approach to deriving total electron content from GNSS signals and implications for ionospheric dynamics near the magnetic equatorSlant TEC for SOKA (Songkha). a Slant TEC arcs corrected by instrumental biases estimated by simple method of Ma and Maruyama (2003) (method A), and b slant TEC arcs adjusted to zero at the start of each arc (method B)Back to article page