Estimation of the residual effect of the ionosphere in a dual-frequency combination formation using GLONASS signals

摘要

The interaction of radio signals with the Earth's atmosphere ionospheric plasma is one of the causes of the error in the positioning and time results definitions. Currently, ones the used method of estimating the delay by dual-frequency measurements is the most effective. This combination allows to compensate for the error generated by the navigation signal delay in the ionosphere. However, the analysis data shows that there are higher order coefficients for ionospheric that make up less than 1% of the first order term at GNSS frequencies. This article assesses the influence of the ionospheric delay of the high order of the GLONASS navigation signal.