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TOTS - Tomographie Océanique en zone peu profonde : nouvelles perspectives en traitement du signal

Project Coordinator : Barbara NICOLAS

Project realized thanks to the support of : ANR Jeune Chercheur

Start date : 2011/12/01

Duration : 36 mounths

Web site :

TOTS stands for « Tomographie Océanique en zone peu profonde : nouvelles perspectives en Traitement du Signal »  (Shallow water tomography: new trends in array signal processing) and addresses three different problems which can be seen as shallow water acoustic tomography:
- Sound speed tomography providing the spatio-temporal sound speed structure of a ocean portion,
- Detection-localization of a target in a shallow water environment, performed from the tomography of the acoustic impedance of the target,
- Surface tomography whose goal is to retrieve the range-dependent elevation of the ocean surface.

Usually these problems are considered separately as they can appear disconnected from each other at first glance. In this project, we decide to work on them jointly as our array processing algorithm can be used to perform all the tomographies and thus estimate ocean volume heterogeneities as well as the ocean surface.


This project is thus a multidisciplinary project, carried by researchers from different scientific fields, which will deal with two main tasks: development of the methods (from the extraction of acoustic observables to inversion) and application of these methods on real data (at-sea and ultrasonic tank data) to perform high-resolution shallow water tomography.
Through this project, we aim at gathering, around Barbara Nicolas, a junior CNRS research scientist at Gipsa-lab, a work force in Grenoble devoted to research on shallow water tomography. Note that as the material environment (ultrasonic tank) has received funding (through an “ANR Chaire d’Excellence Junior” granted by P. Roux in 2005 and more recently through a PEPS obtained by B. Nicolas in 2009), the needs of this project mainly concern workforce. Consequently, we apply for a Post-Doc position on the project during the 36 months.
The two laboratories involved in this project are GIPSA-lab and LGIT (Grenoble). Through an established collaboration with MPL (Scripps San Diego), they will have full access to at-sea data.

GIPSA-lab, 11 rue des Mathématiques, Grenoble Campus BP46, F-38402 SAINT MARTIN D'HERES CEDEX - 33 (0)4 76 82 71 31