Seasondaily variability of GNSS sygnals ionospheric delays and effectiveness of their compensation using the network differential method

1Zhalilo, AA, Bessonov, Ye.A, 2Zanimonskiy, Ye.M
1Main Astronomical Observatory of the National Academy of Sciences of Ukraine, Kyiv, Ukraine; Kharkіv National University of Radio Electronics of the Ministry of Education and Science of Ukraine, Kharkiv,Ukraine
2Institute of Radio Astronomy of the National Academy of Sciences of Ukraine, Kharkiv, Ukraine
Section: Space Geoinformatics and Geodesy
Publication Language: Russian
The results of researches of variability and comparative effectiveness of the ionospheric delays compensations by use of
the network differential GNSS-positioning method in different seasons are presented. It is shown that the residual ionospheric errors at single-frequency differential positioning may achieve 0.3 m on baseline distances up to 35 km and 0.9 m on baseline distances up to 150 km in autumn and winter, while their value is reducing 2-3 times in spring and summer. Using own approach for network differential corrections of GNSS observations we are able to reduce considerable (by 30—40 %) the residual ionospheric errors and to increase the positioning accuracy.
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