S. Dwyer, K. Venkateswara

Sheila turned WFS on and locked the X-arm using the green laser. I then took measurements with and without the LLO sensor correction on ITMX and ETMX. I also tried out the low-frequency sensor correction (using Rich's SC filter and the tilt-subtracted sensor ), only at ETMX. ASD plots are attached showing various sensors. And a comparison of the control signal for the different configuraitons.

It is likely that ALS is not sensitive enough below 1 Hz to see the effect of the sensor correction.