船姿分析及其对多波束测量的影响

根据船体操纵性和耐波性理论，结合船姿实验数据，分析了姿态参数的外界受动因素。考虑船姿对多波束测量的影响，结合多波束测量原理，分析了不同姿态对坐标的影响，给出了相应的坐标计算和误差影响数学模型，最后姿态测量误差对测深的影响，结合IHO测深规定，计算出了不同姿态测量的精度指标；分析了姿态测量误差对条带拼接的影响，并提出了相应的解决方法。

The Analysis of Vessel Attitude and the Effect for Multibeam Echo Sounding

The analysis of vessel attitude and the effect of vessel attitude for multibeam echo sounding are discussed in this paper.During analyzing the factors that affect vessel attitude,wind power,wind direction,current velocity,water depth ,vessel velocity are thought to be external factors.The yawing angle is looked as summary effect of wind power,wind direction,current velocity,water depth for vessel attitude.Yawing angle,cross wave,water depth and the shape of sea bed(or river bed) are included in effect factors for vessel roll.The disturbed factors for dynamic squat includes mainly vessel velocity,yawing angle and coefficient of vessel shape.In these factors,vessel velocity is looked as a key factor.The effect factors for pitch is similar to dynamic squat situation,and the effect of vessel velocity is direct.In general,all of these factors for roll is larger than for pitch. With the change of vessel attitude,the transducer of multibeam echo sounder is changed.The change is produced by roll,pitch and heading,so the change must affect the coordinate of beam footprint coordinate.In this paper,the solving method used to get attitude effect and effect of attitude error for coordinate is given.By calculating and comparing,some analyses and researches are done in this paper,and we get some conclusions.It accords with practical surveying.