Volume 39 Issue 1
Jan.  2019
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LIU Ruihua, WANG Ying, WANG Jian. Evaluation on UERE and Positioning Accuracy of BDS[J]. Journal of Space Science, 2019, 39(1): 118-128. doi: 10.11728/cjss2019.01.118
Citation: LIU Ruihua, WANG Ying, WANG Jian. Evaluation on UERE and Positioning Accuracy of BDS[J]. Journal of Space Science, 2019, 39(1): 118-128. doi: 10.11728/cjss2019.01.118

Evaluation on UERE and Positioning Accuracy of BDS

doi: 10.11728/cjss2019.01.118
  • Received Date: 2018-01-24
  • Rev Recd Date: 2018-10-28
  • Publish Date: 2019-01-15
  • User Ranging Error (URE) and User Equipment Error (UEE) are the main factors affecting the positioning accuracy. Civil aviation is the high-end user of BeiDou Navigation Satellite System (BDS). It is necessary to monitor the coverage and service performance of BDS at civil aviation airports. Based on the measured data of BDS at four civil aviation airport observatories, this paper introduces the satellites visibility of each airport, URE solution method, ionospheric delay correction model, tropospheric delay correction model and the evaluation of positioning accuracy. The results show that the number of visible satellites is from 6 to 14, which meets the positioning requirements. At 95% confidence level, the ionospheric delay is better than 7.50m, the tropospheric delay is better than 13.28m, and the URE values of Geostationary Earth Orbit (GEO) satellites, Inclined Geosynchronous Orbit (IGSO) satellites and Medium Earth Orbit (MEO) satellites are better than 2.36m, 1.72m and 2.59m respectively, which meet the requirements of Beidou open service performance specifications. At 95% confidence level, the positioning accuracy is better than 3.63m in the horizontal direction and better than 6.98m in the vertical direction. The coverage and service performance of BDS at the civil airport monitoring stations are good.


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