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Reports until 10:01, Friday 12 December 2014
H1 SEI (DetChar)
krishna.venkateswara@LIGO.ORG - posted 10:01, Friday 12 December 2014 (15583)
Tilt-subtraction during Thursday's mini-wind storm

K. Venkateswara,

As reported yesterday, winds were gusting at 60 mph, at the corner station and roughly 40 mph at EX. They were mostly blowing across, ~ along Y direction for EX. I've attached ASD plots showing the tilt-subtraction during the period with higher wind speeds (GPS time 1102388000 - 1102403000), and the low-wind period (1102408000 - 1102413000).

The residual after tilt-subtraction is much higher during the windy period than without. But it is possible that the floor is being displaced that much more by the wind. The high-wind period drove up the resonance of the BRS, which is why the harmonics of the beam-balance are visible in the low-wind period. But otherwise the residual is as low as during other quiet periods.

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Displaying report 1-1 of 1.