Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Establishment of CTD Calibration System and Uncertainty Estimation

CTD 교정 시스템 구축 및 불확도 평가

  • Lee, Jung-Han (Oceanographic Measurement & Instrument Calibration Service Center, KIOST) ;
  • Hwang, Keun-Choon (Oceanographic Measurement & Instrument Calibration Service Center, KIOST) ;
  • Kim, Eun-Soo (Oceanographic Measurement & Instrument Calibration Service Center, KIOST) ;
  • Lee, Seung-Hun (Oceanographic Measurement & Instrument Calibration Service Center, KIOST)
  • 이정한 (한국해양과학기술원 기기검교정.분석센터) ;
  • 황근춘 (한국해양과학기술원 기기검교정.분석센터) ;
  • 김은수 (한국해양과학기술원 기기검교정.분석센터) ;
  • 이승훈 (한국해양과학기술원 기기검교정.분석센터)
  • Received : 2013.09.23
  • Accepted : 2014.02.11
  • Published : 2014.03.30
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Abstract

The quality control of ocean observations data is becoming a major issue as real-time observational data and information services have increased recently. Therefore, it is necessary for oceanographic instruments to calibrate. In this paper, we first introduce the CTD calibration system and traceability. Next, CTD calibration procedures and estimation of uncertainty of measurement are described. The expanded uncertainty (k = 2) of the temperature, pressure and conductivity are 0.$0.003^{\circ}C$, $6.0{\times}10^{-5}$ and 0.006 mS/cm respectively. Finally, the excellence of CTD calibration and its measurement capability has been proven by comparing the inter-calibration result of KIOST and Sea-Bird Electronics (SBE). CTD calibration residuals are less than ${\pm}0.0001^{\circ}C$, ${\pm}0.001$ MPa, ${\pm}0.0001$ S/m for SBE 3plus temperature sensor, SBE 19plus pressure sensor and SBE 4C conductivity sensor respectively.

Keywords

References

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  1. Summary of 2014 JCOMM Pilot Inter-Comparison Project for Seawater Salinity Measurements vol.38, pp.3, 2016, https://doi.org/10.4217/OPR.2016.38.3.247