Method for estimating an underwater acoustic sound velocity in a network of acoustic nodes, corresponding computer program product, storage means and device

A non-transitory computer-readable storage medium storing a computer program comprising a set of instructions executable by a computer to implement a method for estimating an underwater acoustic sound velocity in a network of acoustic nodes arranged along towed acoustic linear antennas and in which a plurality of acoustic signals are transmitted between the nodes, the method comprising:

• obtaining two predetermined distances each separating a couple of nodes ((A,B), (B,C)) placed along a same first acoustic linear antenna;
• for each couple of first and second nodes ((A,B), (B,C)), obtaining:
• a first propagation duration of an acoustic signal transmitted between said first node and a third node (D) placed along a second acoustic linear antenna;
• and
• a second propagation duration of an acoustic signal transmitted between said second node and said third node (D);
• and
• estimating said underwater acoustic sound velocity, as a function of said two predetermined distances and said first and second propagation durations obtained for each couple of nodes.

A device for estimating an underwater acoustic sound velocity in a network of acoustic nodes arranged along towed acoustic linear antennas and in which a plurality of acoustic signals are transmitted between the nodes, the device comprising:

• means for obtaining two predetermined distances each separating a couple of nodes placed along a same first acoustic linear antenna;
• means for obtaining, for each couple of first and second nodes (A, B):
• a first propagation duration of an acoustic signal transmitted between said first node (A) and a third node (D) placed along a second acoustic linear antenna ;
• and
• a second propagation duration of an acoustic signal transmitted between said second node (B) and said third node (D);
• and
• means for estimating said underwater acoustic sound velocity, as a function of said two predetermined distances and said first and second propagation durations obtained for each couple of nodes.