== Digging up useful information from Kashiwa: L motion of EMTX ==

[T Yamamoto, Enomoto]
Thanks to Yamamoto-san, 900 sec data when Miyamoto-san took damped spectra of the oplev outputs of ETMX during his payload control test is now back to NDS, so we can have an access to it through diaggui or dataviewer (from GPS 1219295154).
Today I looked at the spectrum of length sensing oplev, which should monitor the motion of the test mass in L direction.
This is the result. Looking back the calibration factor for the LS oplev, each segment of the QPD, and klog entries by Miyamoto-san, the output seems to be calibrated to be um and still valid at that time.
RMS in L was 0.5 um, if we believe this result.