Differential correction of ionospheric delay of GNSS signals in single-frequency measurements

Abstract

We describe a method for differential correction of ionospheric delay of GNSS signals in single-frequency measurements. The method involves refining the ionospheric error in measuring pseudoranges for remote receivers, using data obtained by a reference receiver. For specific locations of a receiver and ionospheric pierce points of NS signal propagation paths to it, in the epignosis mode we assess the effectiveness of the method considered. We set the critical frequency data to adjust the ionospheric model for the current situation, using vertical sounding data.