See http://cxc.harvard.edu/mta/SOT_reports/sot-shift.html Shift Report L7031 Start at 2018:294:11:30 GMT = 07:30 am October 21,2018 End at 2018:294:12:30 GMT = 08:30 am October 21, 2018 ACIS SOT Shift Report October 21, 2018 ACIS Personnel: John ZuHone, Gregg Germain, Dick Edgar, Paul Plucinsky PLAN -------- We ran CAP1468 to execute a 24 hour CTI measurement at an ACIS focal plane temperature of -115 C during the recovery from the Safe Mode on DOY 283 The Obsid for this measurement is 62657. This is a 4 CCD ECS measurement clocking I1-I3 and S3 since a 5 or 6 CCD measurement would have violated the 1DPAMZT limit. CLD File executed: 1A_4_CTI_24H_135.cld SUMMARY: -------- The CAP executed exactly as expected. TIMELINE (GMT day 294) ---------------------- 294:11:29 comm check 294:11:32 AOS on DSS 54 294:11:32 Telemetry in Format 4 294:11:36 Verified radiation levels acceptable 294:11:36 OC switches to Format 2 294:11:36 FP temp = -116.2 C -- starting temp 294:11:37 SCS-107 enabled 294:11:38 Obsid set to 62657 294:11:39 1A_WS042_249.CLD uploaded 294:11:40 SCS-249 enabled and activated 294:11:41 WSFTNEG115 command (focal plane to -115 C) 294:11:43 1A_4_CTI_24H_135.cld uploaded 294:11:43 SCS-135 enabled and activated 294:11:45 LOAD_TE observed 294:11:45 System configuration and Huffman table dumped 294:11:45 1STAT1ST bit changed from 1 to 0 indicating science run started 294:11:45 1DPICACU/1DPICBCU currents rose to correct values 294:11:47 FP temp = -114.9 C 294:11:50 1DPAMZT = +16.26 C (the DPA box temperature) 294:11:51 FEP and BEP temperatures between +11.8 and +18.3 C 294:11:51 FP temp = -114.5 C 294:11:58 First Bias map starts to be telemetered 294:11:58 FP temp = -114.2 C 294:12:00 FP temp = -114.4 C 294:12:06 First event data 294:12:07 Event rates on I0-I3, & S3 look reasonable 294:12:07 overclock levels between -12 and -34 294:12:08 FP temp = -114.2 +/- 0.2 C and steady 294:12:13 1DPAMZT (DPA box temp) = +17.4 C and steady 294:12:14 FEP and BEP temperatures between +14.2 and +22.4 C 294:12:30 LOS