An Analysis of GPS Station Positioning Accuracy Variations According to Locations of Obstacles

Title & Authors
An Analysis of GPS Station Positioning Accuracy Variations According to Locations of Obstacles
Sohn, Dong-Hyo; Park, Kwan-Dong; Jung, Wan-Suk; Kee, Changdon;

Abstract
This paper focuses on GPS positioning accuracy variations according to locations of obstacles which surround GPS station. We derived precise coordinates of a GPS station which has a good visibility. Its observation data was rewritten by assuming signal blocking due to obstacle in the elevation angle of $\small{10^{\circ}}$ to $\small{70^{\circ}}$. We processed daily and hourly data for 10 days. In the results using daily data, RMSE was at 10mm level. And RMSE increased to 100mm levels in case of hourly data. As the elevation angle of obstacle increased, the horizontal and vertical RMSE increased, while the height estimates decreased. These results showed the higher the elevation angle of the obstacle increased the loss of large amounts of data by blocking satellite signals direction. In terms of the direction, when the blocking thing was located in the east or west, the coordinate has larger error in the east-west direction. And if signal was blocked at the south direction, the difference between the east-west error and the south-north position error was reduced.
Keywords
GPS;positioning accuracy;obstacles;elevation angle;azimuth angle;direction;
Language
Korean
Cited by
1.
GNSS 위성신호조합과 장애물 근접에 따른 위치정확도 분석,이재원;윤부열;박치영;최혜원;

한국지형공간정보학회지, 2014. vol.22. 3, pp.39-46
1.
Positioning Accuracy Analysis According to the Change of Blockage Location and GNSS Signal Combination, Journal of Korean Society for Geospatial Information System, 2014, 22, 3, 39
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