Discrete EquiSpaced Unshaded Line Array method for target identification using side scan sonar imagery

Abstract

Beam pattern resulting from Discrete Equispaced Unshaded Line Array method is to analyze the pattern of two-dimensional beam pivot at the angle of sound waves coming from the direction of origin on the axis of the received array, will affect the sound beam angle. This research was conducted in December 2016 in the Punggur Sea, Batam, Riau Islands-Indonesia, and its coordinate system is 104° 08.7102 E and 1° 03.2448 N until 1° 03.3977 N and 104° 08.8133 E, DEULA method in target 4 has the highest value in the directivity pattern is 21.08 dB. The results of the beam pattern model show that neither the central value at the incidence angle (°) of the directivity pattern (dB) were not at the 0 (zero) or the beam pattern central have been generated by the target 6 with incident angle -1.5° and 1.5°. In addition, it has declined by 40 dB. Highest result of line trace is target 1 with 191, 88 cm on target 1, and highest of time result is 13568 cm/second on target 4. Seismic figure of side scan sonar imagery have total line trace is 4479, time: 77.9547 cm/s, and gain: 0.00271091.