摘要
在对珠江口外2006年冬季航次走航ADCP观测资料处理中发现用Joyce的方法不能有效地订正系统误差,其原因在于订正角与航速、船艏向相关。给出了一个订正角为船艏向余弦的拟合函数,得出良好的订正结果。分析了VmDas软件处理流速结果的精度,给出了系统误差识别的方法。发现观测资料中一些不能为VmDas软件识别的错误数据,分析了海况对观测资料的影响,提出了观测资料质量控制与误差订正的一套程序。
During processing the shipboard ADCP data of the winter cruise off the Zhujiang River mouth in 2006,it is found that Joyce＇s method cannot correct the systematic error in the data effectively,which is because that the misalignment angle is variable and is related to the vessel speed and heading.A cosine fitting function of heading is proposed for the misalignment angle,and by which the data systematic error is then corrected well.The current errors in the processed data are estimated via the special software VmDas,and a approach to determining the existence of the systematic errors is given.It is found that there are some incorrect measurements and they cannot be identified as bad data by VmDas,the influence of sea state on the data quality is analyzed,and finally puts forward a procedure for the data quality control and systematic error correction are put forward.
出处
《海洋学报》
CAS
CSCD
北大核心
2010年第3期1-7,共7页
基金
中国近海海洋综合调查与评价"908"专项(908-01-ST07)
关键词
走航ADCP
DGPS
系统误差订正
质量控制
珠江口外
shipboard ADCP
DGPS
systematic error correction
data quality control
off the Zhujiang River mouth
