LIGO Document G2101868-v1

Developing a Sensor Array and Applying Seismic Localization to Determine the Source of 4.2 and 15 Hz Features at LLO

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We have identified two low-frequency features present at LIGO Livingston Observatory. We have first applied detector characterization techniques to understand the feature's frequency and amplitude over time, as well as its relative prominence at different parts of the detector. In this current research project, we create our own array of L-22 3-component sensors and dataloggers for use at the LIGO Livingston site. In addition, we apply seismic localization methods, such as beamforming, and transfer functions to identify the directionality of the feature.
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