As one of preparation works before the cooling, I covered easily the oplev setup for WAB by aluminum foils in the IYC this noon. Seems improved from 0.4-10Hz.

Red and blue ones are spectra of 3:30 UTC = 12:30 JST today, before the covering, while purple and light-blue ones are those after the covering (5:41 UTC = 14:41 JST). Vertical axis is in urad/rtHz.

• YAW is so stiff that no peaks are found less than 10Hz.
• PITCH is realtively soft and mix-coupled from the other DoFs; 1.1Hz is X- or Y- DoFs. 3.5-3.6Hz is Z.