Triggered by the low power of RFC TRA, we started to move the piezo of M15 and M16 to try to better realign it. We could optimize from 2.4 V to 2.8 V, but then we realized that yesterday at around 12 UTC the transmission crossed a maximum above 3 V, and this was in correspondance to the alignment of the north arm and a movement of the PR transversal position. 

Moreover, since after the shutdown the beam was no more centered on the ITMs, we moved PR X and Y to recenter it, with the arms locked (see attached plot).

After moving the PR the RFC TRA power was low again and by undoing the steps done at the beginning on M15 and M16 we could recover 3.2 V.