基于CTD比测的国产XCTD热滞后问题处理方案研究  

Research on processing scheme of domestic XCTD thermal lag problem based on CTD comparison measurement

作　　者：姜德良 王超 刘飞 封官延 JIANG Deliang;WANG Chao;LIU Fei;FENG Guanyan(91937 Troops,Zhoushan 316000,China)

机构地区：[1]91937部队,浙江舟山316000

出　　处：《海洋测绘》2025年第1期57-61,共5页Hydrographic Surveying and Charting

摘　　要：XCTD是目前进行海洋温、盐、深观测的重要仪器。由于传感器时间滞后和热质效应引起的热滞后问题会导致XCTD数据盐度衍生计算出现较大偏差,进而严重影响数据质量。针对这一问题,提出在滞后时间小于仪器采样间隔的情况下利用线性插值模拟提高采样率,继而完成时滞订正的思路。经试验该思路可一并解决采样缺失问题,有效降低有/无压力传感器XCTD盐度“单边毛刺”。基于Lueck校正公式利用多组CTD比测数据对有压力传感器XCTD数据开展热质订正参数迭代计算,结果显示最优参数范畴基本稳定,可有效降低与对比CTD盐度测量值之间的RMSE,但针对无压力传感器XCTD在下落深度反演不稳定情况下尚无有效解决方案。XCTD is an important instrument for ocean temperature/salt/depth observation.Due to the sensor time lag and thermal mass effect,the salinity derived calculation of XCTD data exists large deviation,which seriously affects the data quality.In order to solve the problem above,this paper proposes the idea of using linear interpolation simulation to improve the sampling rate and then complete the delay correction when the lag time is less than the sampling interval of the instrument,which is identified that could solve the problem of sampling loss and effectively reduce the spike of XCTD salinity with/without pressure sensor through the experiments.Based on Lucek correction formula,the iterative calculation of thermal and mass correction parameters for XCTD data with pressure sensor was carried out by using multiple sets of CTD measurements.The result shows that the optimal parameter category was basically stable,which could effectively reduce the RMSE between salinity measurements and those of contrast CTD.But there was no effective solution for XCTD without pressure sensor when the fall depth inversion was unstable.

关 键 词：海洋调查 抛弃式温盐深剖面仪 温盐深剖面仪 时间滞后 热质效应 线性插值 

分 类 号：P71[天文地球—海洋科学]