Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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A Detection Method for Irregularity of Ionospheric delay in Network RTK Environment

네트워크 RTK 환경에서 이온층 지연 변칙현상 검출 기법

  • Ko, Jaeyoung (Marine Safety Reserarch Division, Korea Research Institute of Ships & Ocean Engineering) ;
  • Shin, Mi Young (Marine Safety Reserarch Division, Korea Research Institute of Ships & Ocean Engineering) ;
  • Han, Younghoon (Marine Safety Reserarch Division, Korea Research Institute of Ships & Ocean Engineering) ;
  • Cho, Deuk Jae (Marine Safety Reserarch Division, Korea Research Institute of Ships & Ocean Engineering)
  • Received : 2015.09.23
  • Accepted : 2015.10.28
  • Published : 2015.11.30
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Abstract

This paper proposes a detection method for irregularity of ionospheric delay in network RTK (Real Time Kinematic) Environment. The linearity of network RTK correction provided to user can't be assured when a characteristic of temporal-spatial of ionospheric delay is rapidly changed due to geomagnetic storm or solar flare. Therefore, incorrect ambiguity can be resolved and positioning error can be increased. A detection method for irregularity of ionospheric delay is needed to provide reliable correction. In this paper, index to detect irregularity of ionospheric delay is calculated from dispersive corrections and occurrence of irregularity is judged by comparing index and thresholds.

본 논문에서는 네트워크 RTK (Real Time Kinematic) 환경에서 기준국 간 이온층 지연 변칙현상에 대해 검출하는 기법을 제안한다. 태양흑점 폭발이나 지자기 폭풍 등으로 인해 이온층 지연의 시공간적 변화가 심해지면 네트워크 공간 안에서 이온층 지연의 선형성을 보장할 수 없게 된다. 이 때, 생성된 보정정보를 사용자가 사용하면 잘못된 미지정수를 결정하여 위치 오차가 증가하는 현상이 발생할 수 있다. 따라서 신뢰성있는 보정정보를 사용자에게 제공하기 위해서 이온층 지연에 변칙현상을 검출하는 기법이 필요하다. 본 논문에서 제안한 기법은 보정정보의 전파성 항으로 이온층 지연 변칙현상을 검출하기 위한 지표를 계산하고, 이를 임계치와 비교해서 이온층 지연 변칙현상 발생을 판단한다.

Keywords

References

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