| 摘要 |
The invention relates to a method for locating a sound projecting target by means of an elongated underwater antenna (10) having a plurality of electroacoustic converters (11), wherein a horizontal target location (β) is determined in the water as the target in a directionally selective manner from the receiving signals of the converters (11), including a measured variable (C) of the acoustic velocity. In order to compensate the systematic location error inherent in such an underwater antenna, which may lead to erroneous locations particularly in the case of greater locating angles, the acoustic radiation course is calculated in the acoustic distribution direction specified by the target location (β) by means of an acoustic distribution model, and a vertical acoustic incident angle (G) is determined at the location of the antenna from the acoustic radiation course for an estimated distance and depth of the target. A correction factor is deduced from the vertical acoustic incident angle (Yk), and the measured variable (C) of the acoustic velocity is corrected by multiplying the measured variable by said acoustic incident angle. Locating in turn is carried out using the corrected variable (C) of the acoustic velocity, and an improved target location (β) is obtained.
|
