Integrated ocean bottom towed array for four-component seismic data acquisition

An integrated ocean bottom towed four-component array for seismic data acquisition comprising a submarine cable (1) having a cable joint (6) and a hydrophone section (2), a four-channel electronic section for seismic data acquisition (3), and a three-component geophone section (4) assembled in a sealed housing (5), wherein the housing (5) is connected with the submarine cable (1) through the cable joint (6), characterized in that:

• (a) the said submarine cable (1) comprises a core having an armored structure in which a power line (36) and a data transmission line (39) are assembled in its central part, packing cords (41) surrounding an internal protective layer (38) are filled up around armored structure, inner layer steel wire ropes (37) and outer layer steel wire ropes (40) are assembled as cable reinforcement elements covered by an external protective layer (35);
• (b) the said hydrophone section (2) comprises a plurality of round ceramic wafers (11) on the acoustically transparent housing (13) and an impedance converting transformer (12) to form a real acceleration sensor;
• (c) the said electronic section for seismic data acquisition (3) comprises a CPU board (14), a data transmission board (15), an acquisition board for channel 1-2 (16), an acquisition board for channel 3-4 (17) and a power board (18) on a printed circuit stand (19), having (V), (SX), (SY) and (H) signal input channels for data acquisition;
• (d) the said geophone section (4) comprises two horizontal component geophones (7) and (8), and one vertical component geophone (9) to form three velocity sensors on a double-shall gimbal mount (10), with a short wire connected internally between the geophones and the acquisition channels;
• and,
• (e) further wherein each section is designed as a four-component receiving point and is connected to each other section via said submarine cable (1) in series to form a multi-channel acquisition system.