Noise injections on NE and WE payloads in vertical direction have been performed on Thursday 21.

Fig 1: injection on NE. The vertical resonance of F7 crossbar was expected at 48.18 Hz, and it was there. In the clean data no evident peak at that frequency is present. The projection of Y correction applied by the damper is low.

Fig 2: injection on WE. The vertical resonance of F7 crossbar was expected at 48.38 Hz, and it was there. It seems to correspond to a peak visible in the clean data. Moreover, also the main peak in that region (48.05 Hz) seems excited by the noise injection. There is no noise projection of Y_CORR, because the vertical damper is not in use for WE.

More investigation is needed, in order to understand if and how the WE payload is responsible of those peaks.