Aug_11_2000_L385.txt Shift L385 Start at 2000:224:11:30:00 GMT = 2000 Aug 11 7:30am EDT End 2000 Aug 11 11:30am EDT SOT shift report 2000-08-11 L385 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Aug_11_2000_L385.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Running AUG0600C on decending leg with LETG inserted. Still observing PKS2155-304 as part of series of ACIS-S/LETG cal observations. Obs 1791 in process now. ACE radiation levels high now (about 10,000 in proton channel) and have had large Kp which generated paged warnings. See Note 1 below for radiation analysis. ORBITAL EVENTS: 2000:223:03:17:09.696 139 EPERIGEE ORBIT PERIGEE 2000:223:08:14:44.614 140 XE1RADZ0 ELECTRON1 RADIATION EXIT0 2000:224:11:01:02.379 140 EAPOGEE ORBIT APOGEE 2000:225:12:51:25.065 140 EE1RADZ0 ELECTRON1 RADIATION ENTRY0 2000:225:18:46:00.717 140 EPERIGEE ORBIT PERIGEE 2000:225:18:47:25.065 140 EP1RADZ0 PROTON1 RADIATION ENTRY0 2000:225:19:43:25.065 140 XP1RADZ0 PROTON1 RADIATION EXIT0 2000:225:22:19:25.065 141 XE1RADZ0 ELECTRON1 RADIATION EXIT0 2000:227:02:29:10.755 141 EAPOGEE ORBIT APOGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift 224:1130 LOS at start shift Status at last contact was nominal (see note 2) 224:1130 1791 End of shift 224:1530 NOTES/ISSUES/PROBLEMS --------------------- 1) Radiation (at 224:1244): - Current ACIS radiation dose this orbit is 1.8E+8 - ACIS out of FP for perigee passage at 225:0954 - 21hrs 10 mins exposure to go this orbit (76,200 secs) - Added dose at 10,000 level is: 3.8E+8 using de-rating factor of 2 for LETG in - Summed dose is 5.6E+8, below warning level (1.0E+9) and budget per event (2.0E+9) - Kp level is high but we don't know exactly how to handle this yet. - Situation will be discussed at 10:30am EDT in radiation working group telecon 2) Chandra snapshot not getting data from psicorp, data from coot used: Status at 224:1129: PCAD MODE = NPNT NPNT CONTROL LAW FLAG = NPNT NPNT Stars: = 5 5 FIDS = 3 3 RA = 329.565571 deg 329.56312 DEC = -30.303633 deg -30.30277 ROLL = 24.313487 deg 24.31232 Format = 2 2 OBSID = 1791 1791 SIM FA = -467 -468 SIM TSC = 72439 72440 HETGA = 80.21 deg (OUT) OUT HETGB = 80.58 deg (OUT) OUT LETGA = 7.46 deg (IN) IN LETGB = 4.46 deg (IN) IN EPHIN A-leak = - B-leak = - Altitude = - (km) ACE Proton Flux = 10000 (2 hr avg in 130-214 keV proton channel) Fluence (130-214KeV) = 3.6E+7 LT 3.6E+8 Radiation Level OK Kp Index (Costello) = 5.33 LT 6 is OK EPHIN Geom = - E150 = - E300 = - E1300 = - LT 10.00 (RADMON P4GM = - LT 300.00 Triggers) P41GM = - LT 8.47 HRC SP PS = OFF IM PS = ON SP Top Step = 77 Sp Bot Step = 89 Shield 1 HV = OFF Shield 2 HV = ON step 8 TE Rate 1 = 145 TE Rate 2 = 133 Valid Event Rate 1 = 32 Valid Event Rate 2 = 46 Shield Event Rates = 2700 ACIS FP Temp = -109.0 (correct - target == -110 for cal obs) Cold Radiator = -120.7 DEA Pwr = 55.6 DPA Pwr = 40.2 Science State = Science Active 3) Notes from 9:00am meeting: Operations (Darrell): - 3 supports last 24 hrs, 2 34m, 1 26m, 3 SSR dumps, all OK - 1 load segment uplinked - Ran CAP 644 to dump SCS 109-110 status, they were vacant - Plan to run CAP 641 today to upload off-point patches - ASVT will be run to simulate the off-point demo Mission Planning (Dan/Ken/Kevin): - AUG13 load approved yesterday - AUG20 load being worked, products out Monday - Eclipse demo support required Monday, Aug 14 from 7:30pm EDT to 2:00am Tuesday Spacecraft Engineering (Jeff/Wallace): - ASVT sim of off-point demo to be held today - Will review LETG CAP again late today SOT (Bill Podgorski): - Discussed radiation situation as noted above. - At 10:30am the radiation group was briefed and concurred with the decision to take no action now, but watch carefully. - Next COMM is at 3:00pm EDT with Rob on duty - Chandra snapshot was not available from last pass DSOPS(Jen): - Several quick looks (see below) - Chandra snapshot disrupted by problems with psicorp, which have since been fixed GOT(Ken) - All is OK. 4) Quick Look data review(OK unless noted): Seq # ObsID It Target start time SI Grat Comments ---------------------------------------------------------------------------------------------------------- 390014 01796 00 PKS2155-304 2000:221:01:21:59.348 20.0 ACIS-S LETG 700191 00886 00 MKN 478 2000:221:19:50:26.431 80.0 HRC-S LETG 390017 01799 00 PKS2155-304 2000:223:12:00:41.706 20.0 ACIS-S LETG 390019 01801 00 PKS2155-304 2000:223:23:25:39.780 10.0 HRC-I LETG