After 2h44m in NLN with some violin damping changes (70020), we lost lock at 01:07UTC. Cause unknown, DCPD saturation at time of lockloss.
Went though an initial alignment, still had trouble at DMRI/PRMI locking but think I've jut tracked it down to sam SRC issue TJ/Sheila found earlier 70013, see attached to compare this afternoons successful and recent attempt.
Using to rotation for IFO locking help sheet, I contacted Jenne, who helped me see that SRM was not well aligned during initial alignment, thank you Jenne! We requested ALIGN_IFO to ALIGN_SR2, OFFLOAD_SR2_ALIGNMENT (this only moved SR2 ~3urad) and then paused in AQUCIRE_SRC and moved SRM a lot (~150urad) in Yaw to get AS_A_DC_NSUM flashes higher. This appears to be the same issue Austin found in FRS 26873.
Now have DRMI locked and moving up!
Symptoms for SRC not really being locked during INITAL_ALIGNMENT: AS_A and AS_B NSUM flashes are small see (attached LSC > LOCKING > Init align Scopes > IR Scopes of not really, and really locked), also AS_AIR camera flashes look strange, SRM saturating.
