一种考虑船舶航速航向的AIS航迹插值方法

An AIS track interpolation method considering the vessel's speed and course

海上目标多手段融合探测中,需要等时间间距的AIS信息来描述船只的航行轨迹,作为验证其他船只探测手段的依据。针对传统的AIS线性插值方法在同一船只相邻2条AIS信息时间间隔过长时产生较大偏差的问题,本文提出一种新的AIS航迹插值方法。该方法综合考虑了目标的航速、航向等动态信息,通过对插值时间段内的船只位置进行预测,形成运动船只在该时间段内的插值航迹。最后,利用实测AIS数据对该方法进行验证,结果表明,相比线性插值,本文所提方法的航迹插值结果更接近船只在插值时间段内的实际航行轨迹。

In the multi-methods fusion detection of marine targets, equal time spacing AIS messages are needed to describe the vessels＇ tracks, thus to be a basis for verifyingother vessel detection methods. If there is a long time interval between two adjacent AIS messages sent by one vessel, the traditional linear interpolation for AIS may cause large deviation. To solve this problem, this article proposed a new AIS track interpolation method. This method forecasts the vessel＇s positions during the interpolation time period by taking into account the dynamic information of AIS, such as speed, course and so on, and then forms the interpolation track of the moving vessel. At last, the proposed method is verified.by measured AIS data. The result shows that, comparing with linear interpolation, the track interpolation result of the method proposed by this article is closer to the real vessel track during the interpolation time period.