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Badmaev A. B., Kozienko L. V., Klimov N. N. Sravnitel'nyi analiz pogreshnostei opredeleniya koordinat odnochastotnymi GPS/GLONASS priemnikami v staticheskom rezhime [On the possibility of using single-frequency GPS/GLONASS receivers during shunting operations at the station]. Sovremennye tekhnologii. Sistemnyi analiz. Modelirovanie [Modern Technologies. System Analysis. Modeling], 2019. Vol. 62, No. 2. Pp. 212–220. DOI: 10.26731/1813-9108.2019.2(62).212–220

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This paper analyzes the coordinate variations obtained by the single-frequency GPS/GLONASS and GPS navigation receivers in the static mode. Positioning errors of navigation receivers, as well as characteristic variations in the coordinates of equipment of different manufacturers, are compared. Various calculation methods were used when processing satellite data. Correlation analysis, statistical analysis, a method of graphic images using the MATLAB software package were conducted. To study the features of the functioning of single-frequency GPS / GLONASS navigation receivers, the authors developed a special hardware-software complex (polygon) based on the IrGUPS, operating around the clock. Navigation information from satellites is simultaneously received by three single-frequency GPS and GLONASS receivers (two identical two-system GPS / GLONASS receivers and one GPS receiver). Based on the results of continuous observations, the analysis of variations in latitude, longitude and height of receivers for periods of 1 and 7 days was carried out. The difference in the character of the variations in the coordinates of receivers of various types is noted. It is shown that the distribution of values of the variations in coordinates obeys the normal or Gaussian law. The errors obtained generally correspond to the declared positioning accuracy of single-frequency equipment. The accuracy of determining the coordinates of a single-frequency GPS receiver turned out to be lower in comparison with two-system single-frequency GPS / GLONASS receivers (2DRMS 2.5 m and 3.0 – 3.7 m respectively). The correlation coefficient between the same type of GPS / GLONASS receivers decreases over time from 0.81 / 0.92 (one day) to 0.67 / 0.81 (one week) for latitude / longitude, respectively. The obtained results can be used in the future to improve the accuracy of determining the coordinates during the shunting operations in the railway transport.

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