Abstract

Distributed Acoustic Sensing (DAS) is an emerging technology that utilizes optical fiber (OF) cables as dense arrays of acoustic sensors to detect submarine cable routes. In this study, we combine DAS with ship-board acoustic sources for submarine cable localization. The spatial location of the cable is determined by connecting the coordinates of each DAS channel, which are jointly estimated by the Chan algorithm and a snow ablation optimization algorithm.

Instructions:

(1) The gauge length are all 10m, the output channel distance is 4m, and the actual channel distance is 4.08998m.

(2) The data file in each folder contains DAS data (unit is nε; the meaning of the file name is: excitation order number_time zone_excitation time) of each excitation (before 0.45s-after 4.5s), which can be read directly by obspy.

(3) The distance from the towed sound source to the stern is 25m.