Expected RGDOP Based Satellite Selection Scheme for Performance Improvement of Precise Float Solution

  • Lee, Sunyong (Navcours Co., Ltd.) ;
  • Lim, Deok Won (Satellite Navigation Team, Korea Aerospace Research Institute) ;
  • Noh, Jae Hee (Department of Electronics Engineering, Chungnam National University) ;
  • Lee, Jin Hyuk (Department of Electronics Engineering, Chungnam National University) ;
  • Lee, Sang Jeong (Department of Electronics Engineering, Chungnam National University)
  • Received : 2018.04.26
  • Accepted : 2018.11.13
  • Published : 2018.12.15


In this paper, the positioning performance index is proposed. The proposed index is used to find satellites that degrade positioning performance to improve the positioning performance. To do this, the proposed index is calculated using the code measurement quality and the DOP. And, through the experiment, the effectiveness of the proposed index is confirmed. In the experiment, the quality of the code measurements is analyzed, and the effectiveness of the proposed index is confirmed by comparing with the result of the precise float solution. Finally, it is shown that the precise float solution performance is improved by using the proposed index.

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Fig. 1. Delay lock loop jitter versus C/N0.

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Fig. 2. Double-diferenced code measurements according to elevation angle.

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Fig. 3. Single-differenced code and carrier phase measurements.

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Fig. 4. Single-diferenced code minus carrier phase measurement.

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Fig. 5. The result of the code measurement quality.

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Fig. 6. The results of the RGDOP and the expected RGDOP.

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Fig. 7. The results of the precise positioning, (a) the normal float solution, (b) the float solution with the expected RGDOP.


Supported by : Ministry of Land, Infrastructure and Transport


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