TITLE: 07/13 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

• 16:00 UTC MANUAL_IA I manualed to SRC align in INIT_ALIGN where I got stuck at SRY as I expected, so I misaligned SRM and touched SR2 to maximize the ASC-AS_A_DC signal. I had to move a lot in YAW, I realigned it and started on SRM next. AS AIR looks good now, the ASC SRC loops seem to be making it worse? It degrades it until it loses lock. I adjusted it by hand, went back and finished the IA parts I skipped then tried SRC again to the same result so I went out of IA and went back into locking. I ended up having to make the following moves:
  • SR2: P -7.0 --> 62.4, Y 2044.0 --> 2052.0 (Reverted)
  • SR3: P 438.8 --> 440.1, Y 122.3 --> 122.8
• 17:45 UTC The camera spot looked much better now, and DRMI flashes were good, now SRC2 loop killed the lock now (makes sense as I couldn't complete SRC align). Sheila and I then held at DRMI_PREP_ASC and I turned off DC3 & 4 and clicked TEST on the SYS asport_protection medm screen to check the fast shutter to confirm it was ok.  alog79097
• 18:43 UTC Held us in down as the R waves of an earthquake rolled in and we couldn't hold als
• 19:32 UTC I got to PREP_ASC again and ran the test again
  • The DC CENTERING loops killed it?
  • No SRC1 loop and I turned off all 4 DC loops as soon as they came on and same behaviour
  • PRMI, I adjusted PR2 a little bit and it made the camera better, we stayed locked through the PRMI to DRMI transition now
  • Both SRC1 and 2 were False and RF90 still oscillated and lost lock
• 22:08 UTC another earthquake shaking things up
• 22:19 UTC dropped to do another IA after touching PR3 a bit (less than a microradian)
  • SR2 align made the camera look bad again and put it back into its previous spot, Making the camera better moves us off center on ASC-AS_C?
• Into single bounce mode, where we recentered SR2 on ASC-AS_C