Journal of Institute of Control, Robotics and Systems (제어로봇시스템학회논문지)

Institute of Control, Robotics and Systems (제어로봇시스템학회)
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An Error Analysis of Precise Point Positioning using Ionosphere Free Combination Measurements

IF 조합 측정치를 사용하는 단독 정밀 측위 오차해석

  • Park, Sul-Gee (Maritime Safety Research Division, Korea Institute of Ocean Science and Technology) ;
  • Cho, Deuk-Jae (Maritime Safety Research Division, Korea Institute of Ocean Science and Technology) ;
  • Shin, Young-Cheol (Dept. of Control and Robotics, Research Institute of Computer, Information and Communication, Chungbuk National University) ;
  • Park, Chan-Sik (Dept. of Control and Robotics, Research Institute of Computer, Information and Communication, Chungbuk National University)
  • 박슬기 (한국해양과학기술원 해양안전기술연구부) ;
  • 조득재 (한국해양과학기술원 해양안전기술연구부) ;
  • 신영철 (충북대학교 제어로봇공학과, 컴퓨터정보통신연구소) ;
  • 박찬식 (충북대학교 제어로봇공학과, 컴퓨터정보통신연구소)
  • Received : 2012.05.22
  • Accepted : 2012.08.06
  • Published : 2012.09.01
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Abstract

An error analysis of PPP (Precise Point Positioning) using IF (Ionosphere Free) combination is given in this paper. It is shown that the performance of the ordinary model with positions, clock bias, integer ambiguities and ionosphere delay as unknowns is equivalent to that of an ionosphere difference combination where ionosphere delay is cancelled out. Furthermore, it is shown that IF combination is an ionosphere difference combination but not unique. It is also proved that all difference models show same performances. The error analysis evaluated with a hardware simulator and real measurements show that the ionosphere delay is effectively eliminated by IF combination or equivalently by the ionosphere difference combination. However, if bias errors such as troposphere, clock bias or multipath are included in the measurements, the performance of the IF combination is degraded because the bias errors are amplified by the ionosphere difference operation.

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References

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