Improvement of Positioning Accuracy of Aerologic Sonde by Means of GPS/GLONASS

In this study, we assessed the error of determining the position of the aerologic sonde by signals of GPS/GLONASS. This error depends on the error of determining the pseudorange and on the geometric factor value. The altitude of the sonde is the most important of all the measured coordinates. In this study, we analyzed the accuracy of measuring the aerologic sonde altitude by means of GLONASS inbuilt tools within the territory of the Russian Federation. We also analyzed how to implement the measurement differential mode in the system of aerological observation of atmosphere and showed the efficiency of the use of a pseudo-satellite in order to improve the accuracy of measuring the sonde position. The use of the differential mode decreases the pseudorange measurement error by several times, which fact results in the decrease of the error of the aerologic sonde altitude measurement. The use of pseudo-satellites allows decreasing the geometric factor value and improving the accuracy of the sonde position measurement. The most obvious solution is to install the pseudo-satellite on the position of the aerological station. In this study, we analyzed the efficiency of this solution.