一种适用于长基线水声定位系统的声线修正方法

Correction of Sound Velocity in Long Baseline AcousticPositioning System

在水声定位系统中,由于水下沿深度方向存在声速梯度,致使声线发生弯曲.为保证较高的定位精度,必须进行声线修正.提出了一种适用于长基线水声定位系统声线修正的迭代方法,所作的湖上试验研究表明,用此方法进行声线修正效果明显.此方法原则上可适用于其他类型定位系统.

In an underwater channel, sound rays often propagate along a bended curve because of the sound velocity varying with depth, which would cause great range error in a long baseline positioning system. So the correction of sound velocity must be considered carefully to get a better position accuracy. The paper presents an iteration algorithm for correcting the sound velocity in a long baseline positioning system. Lake experiments show that the correction is effective. The method can also be applied to other positioning systems.