Abstract:A method of specifying changes in the ionospheric critical frequency along a path has been developed to more accurately estimate the effect of longitudinal horizontal electron density gradients along a path on the accuracy of the calculation of ionospheric delay of GNSS signals. The transition has been made from a linear dependence to a dependence representing a second-order curve through quadratic spline interpolation. To exemplify differences between the real form of change in the critical frequency along a … Show more
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