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The Effect of Altitude Errors in Altitude-aided Global Navigation Satellite System(GNSS)

고도를 고정한 GNSS 위치 결정 기법에서 고도 오차의 영향

  • 조성룡 (충남대 공과대학 전자공학과) ;
  • 한영훈 (충남대 공과대학 전자공학과) ;
  • 김상식 (충북대 전자정보대학 제어로봇공학과) ;
  • 문제형 (충북대 전자정보대학 제어로봇공학과) ;
  • 이상정 (충남대 공과대학 전자공학과) ;
  • 박찬식 (충북대 전자정보대학 제어로봇공학과)
  • Received : 2012.06.14
  • Accepted : 2012.08.05
  • Published : 2012.10.01

Abstract

This paper analyzed the precision and accuracy of the altitude-aided GNSS using the altitude information from digital map. The precision of altitude-aided GNSS is analysed using the theoretically derived DOP. It is confirmed that the precision of altitude-aided GNSS is superior to the general 3D positioning method. It is also shown that the DOP of altitude-aided GNSS is independent of altitude bias error while the accuracy was influenced by the altitude bias error. Furthermore, it is shown that, since the altitude bias error influenced differently to each pseudorange measurement, the effect of the altitude bias error is more serious than clock bias error which does not influence position error at all. The results are evaluated by the simulation using the commercial RF simulator and GPS receiver. It confirmed that altitude-aided GNSS could improve not only precision but also accuracy if the altitude bias error are small. These results are expected to be easily applied for the performance improvement to the land and maritime applications.

Keywords

GNSS;Accuracy;Precision;Dilution of precision(DOP);Altitude-aided;Bias error

Acknowledgement

Supported by : 국토해양부

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