Filtering non-stationary geophysical data with orthogonal wavelets

F. Moreau (1) , D. Gibert (1) , Ginette Saracco (1, 2, 3)

1 geophysique Interne
2 GR - Géosciences Rennes
3 CEREGE - Centre européen de recherche et d'enseignement des géosciences de l'environnement

A filtering method based on both orthogonal wavelet decomposition and chi-squared statistics is proposed to clean non-stationary signals embedded in a gaussian white noise. An application to a time series of thermistance data recorded in an underground quarry illustrates the interest of the technique.

Mots clés: signal processing; orthogonal wavelets; denoising; filtering

Domaines: Géophysique [physics.geo-ph]; Géophysique [physics.geo-ph]; Milieux et Changements globaux

F. Moreau, D. Gibert, Ginette Saracco. Filtering non-stationary geophysical data with orthogonal wavelets. Geophysical Research Letters, 1996, 23 (4), pp.407-410. ⟨10.1029/96GL00155⟩. ⟨hal-00805866⟩