Tensor decomposition exploiting diversity of propagation velocities; application to localization of icequake events
Résumé
The problem of direction of arrival (DoA) estimation of seismic plane waves impinging on an array of sensors is considered from a new deterministic perspective through tensor decomposition techniques. In addition to temporal and spatial sampling, further information is taken into account, based on the different propagation speed of volume waves (P and S) through solid media. Performances are evaluated through simulated data in terms of the Cramér-Rao bounds and compared to other reference methods such as ESPRIT and MUSIC, in the presence of additive Gaussian circular noise. The proposed approach is then applied to real seismic data recorded atArgentì ere glacier, occurring at the interface between the ice mass and the underlying bedrock.
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