UCTD数据处理方法研究  

Research on the UCTD Data Processing Methods

作　　者：张挺[1] 田雨[1] 兰卉[1] 高坤[1] 程敏[1] 许丽萍[1] ZHANG Ting;TIAN Yu;LAN Hui;GAO Kun;CHENG Min;XU Li-ping(National Ocean Technology Center,Tianjin 300112,China)

机构地区：[1]国家海洋技术中心,天津300112

出　　处：《海洋技术学报》2020年第5期19-24,共6页Journal of Ocean Technology

基　　金：国家重点研发计划资助项目(2016YFC1400502,2017YFC1403403,2017YFC1403304)。

摘　　要：本文研究了走航式温盐深剖面测量仪(UCTD)下降速度模型,根据基本参数计算了UCTD的下降速度。理论计算和海上试验表明,UCTD下降速度远大于传统剖面测量CTD,在下放过程中,UCTD下降速度呈现波动减小的现象,给数据处理工作带来新的挑战。本文在借鉴传统CTD数据处理过程的基础上,提出了适用于UCTD、与下降速度相关的数据处理方法,由理论及海试数据计算出具体的UCTD数据处理参数,并建立起数据处理参数与下降速度的依赖关系。UCTD海试数据经过处理后,盐度测量噪声改善明显,测量误差显著减少,与SBE911Plus CTD相比,温度、电导率和盐度的平均绝对误差优于0.01℃、0.03 mS/cm、0.03PSU,达到了UCTD的设计指标。本文建议用户采用自由投放模式投放UCTD,以期获得良好的数据质量。The Underway Conductivity Temperature Depth Profiler(UCTD) descent rate model is studied in this paper. The basic parameters of the UCTD are used to calculate the UCTD descent speed, and the theoretical calculations and sea trials show that the UCTD descent rate is much faster than traditional profile measurement CTDs. This phenomenon brings new challenges to data processing. Based on the research of the traditional CTD data processing process, this paper proposes a data processing method related to decent rate suitable for UCTD. The specific UCTD data processing parameters are calculated from the theory and sea trial data. Relationship between data processing parameters and decent rates is established. After data processing, the UCTD salinity measurement noise has improved significantly and the measurement errors have been significantly reduced. Compared with the SBE911 Plus CTD, the mean absolute errors of temperature, conductivity and salinity are better than 0.01°C, 0.03 mS/cm, 0.03 PSU, which has reached the design target of UCTD. It is recommended that users use the free fall mode to launch UCTD in order to obtain good data quality.

关 键 词：走航式温盐深剖面测量仪 下降速度 数据处理 

分 类 号：P714[天文地球—海洋科学]