stuart.aston@LIGO.ORG - posted 11:31, Wednesday 25 February 2015 - last comment - 12:44, Wednesday 25 February 2015(16917)
OpLev Power Spectra - Targeting ITMY
[Doug C, Jason O, Stuart A] We are planning a B&K hammer training session on an OpLev pier during the maintenance period tomorrow. I conducted a survey of current OpLev power spectra to help identify any particular piers that we should target. The power spectra (attached below) suggest some very low resonances (3.3 Hz & 6.6 Hz) for ITMY, so we shall focus our attention there. n.b.PR3 looks to be misaligned.
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Note, while the PR3 OL looks to have been decentered in some event last week, the PR3 itself took a pointing jump yesterday. We might want to double check the PR3 alignment with comissioners before we bother recentering it.
Note, he the OL did not see yesterdays PR3 alignment, maybe because it is out of range.
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