Travis, Jason, Betsy
Over the last 4 days, we have worked to tune all 12 DOFs (6 each lowest mass on 2 chains) to within the IAS tolerances. As usual, since all DOFs crosstalk, we took many roundabouts, but finally think we have acheived it. Jason will append final pointing/position numbers. TFs taken tonight will exhonorate this "final" pointing. After TMS joins us on the table (still a few days out) and finishes their IAS alignment, we will finish payloading the QUAD.
Note, the alignment process takes many days because after each adjustment, many mechanical brackets and structural items need to be realigned such that the BOSEMs are in range and we can turn the damping on in order to make another IAS measurement of pointing. As well, we have to maintain the floating OSEM/magnet pairing alignments on the lower stages which cause the chain to go out of alignment due to their own weight. Then, IAS makes a measurement, we make the pointing adjustment in the chain, readjust the floating OSEM/magnet pairs (often at the cost of some of the point adjustment we just made), readjust many mechanical brackets, reenable damping everywhere, repeat IAS alignment, cycle around again.
PS - Arnaud is launching TFs tonight,