Abstract
In this work, a new inverse method for estimating sediment sound-speed profiles is investigated. Stickler and Deift derived a trace formula for recovering a seiment sound-speed profile by simply using a reflection coefficient at very low frequencies. The method may be sensitive to noise and also involves computationally cumbersome calculations. In our approach, we first design a linear approximation for the trace formula based on the Born approximation, in order to reduce the computational cost. The stability of the modified inverse algorithm is then tested with synthetic noisy data. Finally, we look into ways for relaxing the limiting assumptions of the approach. [Work supported by ONR and the NSF CSUMS program.]
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