cheryl.vorvick@LIGO.ORG - posted 14:58, Tuesday 27 September 2016 (30014)
IM3 alignment change of 2.5urad is equal to the noise in IM4 Trans yaw qpd signal
noise in IM4 Trans yaw = 0.007
2.5urad change in IM3 yaw as seen on IM4 Trans yaw = 0.007
2.5urad change in IM3 yaw as seen on ISS2 yaw (-p) = 0.030, which is 4.3 times larger than the change on IM4 Trans yaw, and 6 times larger than the noise on ISS2 yaw (-p).
IM4 Trans yaw is a marginal signal for tracking changes in IM3 yaw alignment.
attached: noise chart, IM changes on im4t and iss2, plots of im4t and iss2
Images attached to this report
