Akutsu, Miyo, Simon

This is a report with a somewhat shifted topic for the WAB

When we checked the OpLev signal on Friday last week, it was very well centered and in a good alignment shortly after we left the IYC.
However, on Monday it appeared to be shifted, especially in pitch. Checking the development over the weekend, we could see a long-term drift in pitch and also some movements in yaw.
It is hard to judge what is the actual cause of that. We would need some more data taken over a long time to see whether this is an actul movement of the baffle or something with the OpLev setup.

Also, as can be seen in the picture, on Feb. 25th (Sunday), there are some data missing. We see this not only for the OpLev but also for the photosensors.