Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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The Effect of Antenna Pattern Measurement According to Radio Wave Environment on Data Quality of HF Ocean Radar

전파환경에 따른 안테나패턴 측정(APM) 결과가 고주파 해양레이더의 자료 품질에 미치는 영향

  • Jae Yeob, Kim (Ocean Circulation Research Center, Marine Environmental & Climate Research Division, Korea Institute of Ocean Science & Technology) ;
  • Dawoon, Jung (Ocean Circulation Research Center, Marine Environmental & Climate Research Division, Korea Institute of Ocean Science & Technology) ;
  • Seok, Lee (Ocean Circulation Research Center, Marine Environmental & Climate Research Division, Korea Institute of Ocean Science & Technology) ;
  • Kyu-Min, Song (Ocean Circulation Research Center, Marine Environmental & Climate Research Division, Korea Institute of Ocean Science & Technology)
  • 김재엽 (한국해양과학기술원 해양환경.기후연구본부 해양순환연구센터) ;
  • 정다운 (한국해양과학기술원 해양환경.기후연구본부 해양순환연구센터) ;
  • 이석 (한국해양과학기술원 해양환경.기후연구본부 해양순환연구센터) ;
  • 송규민 (한국해양과학기술원 해양환경.기후연구본부 해양순환연구센터)
  • Received : 2022.10.21
  • Accepted : 2022.11.17
  • Published : 2022.12.30
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Abstract

High-frequency (HF) radar measures sea surface currents from the radio waves transmitted and received by antenna on land. Since the data quality of HF radar measurements sensitively depend on the radio wave environment around antenna, Antenna Pattern Measurements (APM) plays an important role in evaluating the accuracy of measured surface currents. In this study, APM was performed by selecting the times when the background noise level around antenna was high and low, and radial data were generated by applying the ideal pattern and measured pattern. The measured antenna pattern for each case was verified with the current velocity data collected by drifters. The radial velocity to which the ideal pattern was applied was not affected by the background noise level around antenna. However, the radial velocity obtained with APM in the period of high background noise was significantly lower in quality than the radial velocity in a low noise environment. It is recomended that APM be carried out in consideration of the radio wave environment around antenna, and that the applied result be compared and verified with the current velocity measurements by drifters. If it is difficult to re-measure APM, we suggest using radial velocity in generating total vector with the ideal pattern through comparative verification, rather than poorly measured patterns, for better data quality.

Keywords

Acknowledgement

본 연구는 한국해양과학기술원의 주요사업 북서태평양 순환과 기후변동성이 한반도 주변해역 변화와 물질순환에 미치는 영향 I-제주난류 변동성과 역할(PEA0011) 과제의 지원을 받아 수행되었습니다.

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