Measurement and Quality Control of MIROS Wave Radar Data at Dokdo

Abstract

Wave observation is widely used to direct observation method for observing the water surface elevation using wave buoy or pressure gauge and remote-sensing wave observation method. The wave buoy and pressure gauge can produce high-quality wave data but have disadvantages of the high risk of damage and loss of the instrument, and high maintenance cost in the offshore area. On the other hand, remote observation method such as radar is easy to maintain by installing the equipment on the land, but the accuracy is somewhat lower than the direct observation method. This study investigates the data quality of MIROS Wave and Current Radar (MWR) installed at Dokdo and improve the data quality of remote wave observation data using the wave buoy (CWB) observation data operated by the Korea Meteorological Administration. We applied and developed the three types of wave data quality control; 1) the combined use (Optimal Filter) of the filter designed by MIROS (Reduce Noise Frequency, Phillips Check, Energy Level Check), 2) Spike Test Algorithm (Spike Test) developed by OOI (Ocean Observatories Initiative) and 3) a new filter (H-Ts QC) using the significant wave height-period relationship. As a result, the wave observation data of MWR using three quality control have some reliability about the significant wave height. On the other hand, there are still some errors in the significant wave period, so improvements are required. Also, since the wave observation data of MWR is different somewhat from the CWB data in high waves of over 3 m, further research such as collection and analysis of long-term remote wave observation data and filter development is necessary.

Algorithm Development for Quality Control of RangeFinder Wave Time Series Data at Ocean Research Station

“…하지만 이 연구에선 이벤트성 기상에 의해 발생하는 고파랑에 대한 신뢰도를 검증하지 못하였다. 이를 보완하기 위해 독도에서 수행된 연구는 상위 버전의 SW-002를 사용했 으며 대체된 새로운 필터를 이용하여 약 2년간의 MWR 자 료를 재분석하였다 (Jun et al, 2020). 반면, 본 연구에서 활용 하는 RangeFinder는 주로 선박에 설치하여 얻은 실시간 해수 면 자료의 정확도나 항해의 안정성을 높이기 위한 데이터 분석 및 검보정을 위한 국외 연구에 사용되었다 (Gangeskar, 2014;Zinchenko et al, 2021) 지로 분류가 가능하다(Fig.…”