Dec_23_1999_L153.txt Shift L153 Start at 1999:357:13:00:00 GMT = 1999 Dec 23 8:00am EST End 1999 Dec 23 12:00pm EST See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Dec_23_1999_L153.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Running load DEC1999C load. Running ACIS-I observation 901. on downward leg. last apogee == 356:1749 next perigee == 358:0134 next apogee == 359:0919 Prep for rad-zone at 357:1635. Do 2 CTI measurements and shut ACIS down for rad zone passage at about 357:2045. EVENTS DONE OBSID -------------- ---- ----- Start Shift 357:1300 AOS DSS-54 (Madrid) 357:1405 901 Chandra status at AOS (see note 1) LOS DSS-54 357:1600 End of shift 357:1600 NOTES/ISSUES/PROBLEMS --------------------- 1) Chandra's state at AOS 355:1425 was: WAS EXPECTED PCAD MODE = NPNT NPNT CONTROL LAW FLAG = NPNT NPNT Stars: = 5 5 FIDS = 3 3 RA = 73.529884 deg 73.52988 DEC = -10.275841 deg -10.27584 ROLL = -22.800740 deg -22.80074 Format = 2 2 OBSID = 901 901 SIM FA = -535 -536 SIM TSC = 92903 (ACIS-I) 92905 HETGA = 80.96 deg (OUT) OUT HETGB = 81.33 deg (OUT) OUT LETGA = 80.21 deg (OUT) OUT LETGB = 79.08 deg (OUT) OUT EPHIN A-leak = 0.2200 B-leak = 0.0360 HRC SP PS = OFF IM PS = ON IM Top Step = 42 IM Bot Step = 53 Shield 1 HV = OFF Shield 2 HV = ON Shield 2 STP = 8 Valid Event Rate 1 = 0 Valid Event Rate 2 = 0 Shield Event Rate 1 = 4300 Shield Event Rate 2 = 4600 ACIS FP Temp = -109.0 DEA Pwr = 57.3 watts DPA Pwr = 42.2 watts GSE Status = Clocking data 2) 9:00am Meeting notes. OPERATIONS: - One problem with DSS-34 recorder dump, switched channels and got good dump. Otherwise all dumps OK and uplinked another load segment. MISSION PLANNING: - DEC2699C products out, review at 1:00pm. ENGINEERING: - Thermal weekly sent out. All temps nominal except for period when ACIS FP was set to -125C (radiator colder). - Quarterly report out today. 3) Quicklook --------- OBSID Target Instrument Time Comment ----- ------ ---------- -------------- ---------------------------------------- 1412 CEN-A HRC-I 355:17:59:13.731 Source visible 749 RX J0822-4300 HRC-I 355:22:39:13.264 Nice looking extended image 609 LAMDA ANDROMEDAE ACIS-S/HETG 351:03:54:53.159 0th order and HEG/MEG dispersion visible