Method, module and system for determining a velocity profile of sound waves in a water column
AssigneeNaval Group
InventorJonathan Andre
Life of this patent
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Abstract
This method includes emitting, by an emitter at an emitting depth, moved along an axis, at least one incident sound wave at an emitting frequency, receiving a first sound wave reflected by a first reflective object at a first depth and a second sound wave reflected by a second reflective object at a second depth, greater than the first depth, providing a first velocity at the first depth, and determining a second velocity of the sound waves at the second depth, from the frequencies of the first and second reflected sound waves, the emitting frequency and the first velocity.
Claims20
A method for determining a velocity profile of sound waves in a water column, said method comprising the following steps:
- emitting in said water column, by an emitter located in the water column at an emitting depth, an incident sound wave emitted at an emitting frequency, said emitter being moved along an axis extending along a length of said water column in a depth direction;
- receiving, by a receiver, a first sound wave reflected by a first reflective object located in said water column at a first depth, and a second sound wave reflected by a second reflective object located in said water column at a second depth, the second depth being greater than the first depth;
- determining a first velocity of the sound waves at said first depth;
- and
- using a frequency of the first reflected sound wave, a frequency of the second reflected sound wave, the emitting frequency, and said first velocity to determine a second velocity of the sound waves at said second depth.
Dependencies are inferred from the claim text.