多波束系统横摇、纵倾参数的校正方法

多波束水深测量系统以条幅式测量为特点,比较传统单波束测深发生了巨大的变化,能够进行实时声速、船体姿态等参数的改正.多波束系统换能器安装时存在的纵倾角度偏差(pitch bias)和横摇角度偏差(roll bias)是产生水深测量系统误差的重要来源之一.分析两个参数对水深测量精度的影响,并根据其误差在地形剖面上的表现形式,讨论实测法和剖面重合法两种参数测试的方法,特别是针对剖面重合法参数测试,制作可视化操作界面,大大方便了野外和室内参数调整.测试获取的纵倾、横摇参数输入多波束系统中进行实时水深校正.在室内资料处理中,利用参数校正方法,能够对野外采集资料进行再处理,提高资料质量.

The methods correcting roll and pitch biases of multi-beam bathymetric system

Compared with the traditional single beam system, multi-beam bathymetric system measuring water depth in the form of belt can adjust parameters such as real time velocity of sound and vessel posture. The pitch and roll biases during transducer installing are important error sources in the bathymetric system. The effects of these two parameters on precision of bathymetry have been analyzed. According to the error properties in terrain profile, parameter testing methods by both real time measurement and overlaid profile are discussed, especially, a visible operating interface for overlaid profile is designed for the convenience in adjusting field and indoor parameters. The pitch and roll biases obtained from testing this multi-beam system are used to adjust real time water depth. In addition, field data can also be reprocessed in indoor data processing based on parameter corrections to improve data quality.