CAJ | 학술논문

GPS 浮标作为一种新型的海洋测量设备，近年来在海面高度现场测量和星载高度计定标方面取得了重要应用。通过仿真试验对反演海浪谱的方法和流程进行研究，旨在探索从 GPS 浮标测量的海面高度序列中提取海浪谱的方法。首先，使用 Longuest 模型生成了海浪波面位移时间序列，并通过Pierson-Moscowitz 风浪谱对波面位移的统计特性进行约束，其随机性由相位引入。结合典型潮汐和GPS 浮标仪器噪声的仿真时间序列，合成了仿真时间长度1 h 的1 Hz（每秒1次）随机海面高度序列。然后，利用自相关函数法，进行高通滤波和数据压缩，得到了仿真的海浪谱。该仿真结果和理论海浪谱非常接近，可满足海浪谱反演的需求。最后，通过山东石岛外海的 GPS 浮标现场试验，验证了本文提出的反演方法的适用性。本文的研究解决了 GPS 浮标反演海浪谱的关键问题，丰富了海浪谱反演的手段，拓展了 GPS 浮标的应用领域，有望为未来我国的星载波谱仪定标服务。
GPS 부표작위일충신형적해양측량설비，근년래재해면고도현장측량화성재고도계정표방면취득료중요응용。통과방진시험대반연해랑보적방법화류정진행연구，지재탐색종 GPS 부표측량적해면고도서렬중제취해랑보적방법。수선，사용 Longuest 모형생성료해랑파면위이시간서렬，병통과Pierson-Moscowitz 풍랑보대파면위이적통계특성진행약속，기수궤성유상위인입。결합전형조석화GPS 부표의기조성적방진시간서렬，합성료방진시간장도1 h 적1 Hz（매초1차）수궤해면고도서렬。연후，이용자상관함수법，진행고통려파화수거압축，득도료방진적해랑보。해방진결과화이론해랑보비상접근，가만족해랑보반연적수구。최후，통과산동석도외해적 GPS 부표현장시험，험증료본문제출적반연방법적괄용성。본문적연구해결료 GPS 부표반연해랑보적관건문제，봉부료해랑보반연적수단，탁전료 GPS 부표적응용영역，유망위미래아국적성재파보의정표복무。
The purpose of this paper was to investigate the method of retrieving ocean wave spectrum from GPS bu-oy sea surface height time series.GPS buoy,an innovative instrument on ocean topography measurement,played an important role in in-situ sea level measurements and satellite altimetry calibration during past years.This paper demonstrated the method and procedure of wave spectrum retrieval by simulation experiments.Firstly,the wave surface elevation time series were generated based on the Longuest model,and the statistical characteristics were constrained by the Pierson-Moscowitz wind wave spectrum,and the randomicities were introduced from the wave phase.Along with the simulated tide height and GPS buoy instrument noise time series,the 1 Hz (one point per second)random sea surface time series of 1 hour length were synthesized.Afterward,the simulated wave power spectrum was acquired by the auto-correlation function method,containing high-pass filter and compression.The simulated spectrum was pretty close to the theoretic one,and could fulfill the requirements of ocean wave spectrum retrieval.Finally,the retrieving method presented in this paper was validated by the in-situ GPS buoy campaign in the offshore of Shidao,Shandong Province.The study in this paper solved the key issues of the new technology, enriched the approaches of ocean wave spectrum retrieval,explored the application of GPS buoy,and could be served for China's forthcoming satellite radar wavimeter.