edmond.merilh@LIGO.ORG - posted 05:16, Saturday 26 September 2015 - last comment - 07:46, Saturday 26 September 2015(21970)
Mid-Shift Summary - OWL
Mid-Shift Summary: IFO Locked @ 64Mpc (lower than normal due to funny business visible in DARM). No obtrusive Seismic or wind activity. 2 ETMY glitches. Some increasing activity in the lower DARM frequencies are causing drops in range. It just keeps bouncing up and down (see screenshots) Is this a combination of bounce and roll modes ringing up? This was the same activity that I noted in my transition summary. Is it from anthropogenic noise?
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So this was due to the 45Mhz RFAM issue that H1 has been experiencing. With Mike L's help, I got an education on what it is and how to try and tame it in the days prior to it being rectified once and for all.