LIGO Document G1500573-v1

Disentangling Glitches

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G - Presentations (eg Graphics)
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A simple physically driven model whereby noise glitches in gravitational wave data are viewed as linear or multi-linear combinations with random amplitudes and delays of a few independent elementary waveforms (representing the transfer functions between un-accessible disturbance entry-points and the data channel) is presented. The number of (independent) elementary consituents is estimated via principal component analysis. A shifted indipendent-component-analysis algorithm is proposed as an effective tool for disentangling observed glitches into their elementary constituents. Numerical experiments are presented, and ensuing perspectives for active glitch subtraction and noise (re)-gaussianization are discussed.
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Associated with Events:
GWPAW 2015 held on 17 Jun 2015 in Osaka, Japan

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