Mar_13_2000_L234.txt Shift L234 Start at 2000:073:12:30:00 GMT = 2000 Mar 13 7:30am EST End 2000 Mar 13 11:00am EST See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Mar_13_2000_L234.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Running Mar0500D, observation 00002, ALGOL HRC-S + LETG, near orbit apogee. ORBITAL EVENTS: 2000:072:09:39:25.698 82 EPERIGEE ORBIT PERIGEE 2000:073:17:23:59.009 83 EAPOGEE ORBIT APOGEE 2000:075:01:08:50.767 83 EPERIGEE ORBIT PERIGEE 2000:076:08:52:44.145 84 EAPOGEE ORBIT APOGEE 2000:077:16:37:57.693 84 EPERIGEE ORBIT PERIGEE 2000:079:00:20:57.806 85 EAPOGEE ORBIT APOGEE 2000:080:08:05:28.665 85 EPERIGEE ORBIT PERIGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift LOS 073:1230 State at last pass was nominal 2 (see note 1) AOS DSS-16 (Goldstone) 073:1400 2 Chandra status at shift start was nominal (note 2) 073:1240 Reset HRC GSE 073:1500 (see note 3) Lots of bad telemetry followed by complete loss 073:1536 Switch to LGA A 073:1554 Regain telemetry 073:1555 LOS DSS-16 073:1600 End of shift 073:1600 NOTES/ISSUES/PROBLEMS --------------------- 1) State at last COMM: UTC 2000:073:07:22:02 (Mon Mar 13) f_ACE 1.58e+01 F_ACE 3.07e+06 R km 134114A OBT 2000:073:07:20:45 CTUVCDU 8171903 OBC s/w NRML FMT1_NORM CPEstat NORM OBT 69319245.88 ONLVCDU 8171888 OBC Errs 0 OBSID 2 EPState SUN SIM TTpos -99615 HETG Angle 80.6 PCADMODE NPNT RA 47.021 Bus V 30.55 SIM FApos -990 LETG Angle 4.5 PCONTROL NPNT Dec 40.965 Bus I 30.77 AOFSTAR GUID Roll 297.794 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 14.10 Yaw Rate -0.33 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang -19.87 Pitch Rate -0.13 OBSMode OBSV ACA Int Time 1.698 Roll Rate -0.16 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.02 Batt 1 SOC 100.00% Avg HRMA Temp 70.58 FSS Beta 24.42 Batt 2 SOC 100.00% ACIS Stat7-0 65 Avg OBA Temp 51.05 SA Resolv 65.85 Batt 3 SOC 100.00% Cold Rad -127.9 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -82.0 OBA Trng Fault NFLT +Y SA Amps 14.49 HRMA power 45.10 -Y SA Amps 15.66 EPHIN Geom LARG OBA power 78.70 +Y SA Temp 113.28 E1300 1 -Y SA Temp 113.58 P4GM 0 Roll Mom. -3.330 SCS 128 P41GM 0 Pitch Mom. -0.521 SCS 129 UpL Cmd Acc 34286 A-Leak 0.3560 Yaw Mom. 6.010 SCS 130 Cmd Rej A 129 B-Leak 0.0560 Expected RA, Dec, Roll (degrees): 47.01179, 40.96549, 297.80011 2) Chandra's state at 073:1430 was: WAS EXPECTED PCAD MODE = NPNT NPNT CONTROL LAW FLAG = NPNT NPNT Stars: = 5 5 FIDS = 3 3 RA = 40.011794 deg 47.01179 DEC = 40.965492 deg 40.96549 ROLL = 297.800106 deg 297.80011 Format = 1 1 OBSID = 2 2 SIM FA = -990 -990 SIM TSC = -99615 -99616 HETGA = 80.58 deg (OUT) OUT HETGB = 81.33 deg (OUT) OUT LETGA = 7.46 deg (IN) IN LETGB = 4.46 deg (IN) IN EPHIN A-leak = 0.3760 B-leak = 0.0600 ACE Proton Flux = 253 (2 hr avg in 130-214 keV proton channel) Fluence (130-214KeV) = 1.3E+5 LT 3.6E+8 Radiation Level OK EPHIN Geom = LARG E1300 = 1 LT 1318.52 (RADMON P4GM = 0 LT 118.08 Triggers) P41GM = 0 LT 100.00 HRC SP PS = ON IM PS = OFF SP Top Step = 90 SP Bot Step = 102 Shield 1 HV = OFF Shield 2 HV = ON Valid Event Rate 1 = 81 Valid Event Rate 2 = 94 Shield Event Rates = 3700 ACIS FP Temp = -119.9 Cold Radiator = -127.9 DEA Pwr = 45.7 DPA Pwr = 41.8 3) HRC GSE not functioning. Had GOT reset connection, no luck. Killed HRC data acq pgm and then restarted, this worked. 4) Notes from 9:00am meeting: Operations (Darrel Wicker): - 10 supports, 10 dumps over weekend, one bad on DSS-24. Restarted bad dump, got most of it and got the rest next pass. Initial failure was due to loss of telemetry channel at ground station. - Onboard loads good thru day 73:0345. - Eclipse #7 this cycle yesterday (day 72). All nominal. Mission Planning (Dan Shropshire): - Discussed two problems with OFLS Release 8. First is scheduleing of ACIS bias measurements backwards into rad passage. Second is in specifying a roll constraint PLUS a target offset. It does the roll constraint, but forgets the target offset. First has heen fixed in Release 8.1 to be tested this week. Second will need a new patch, 8.2. Neither one will impact work on current load. - Discussed the new ACIS constraint, don't point radiator at earth below 100,000km. MP team will go over this today. Spacecraft Engineering: - All is OK. SOT (Bill Podgorski): - Discussed work on ACIS-S boresight shift. ASCDSOPS(Jen Lauer): - 2 quick looks available (see below) 4) Quick Look data review: OBSID Target Time Comment ----- ------ -------------- ------- 00720 TERZAN 6 2000:069:05:40 HRC-I, looks OK 00673 TERZAN 2 2000:069:01:18 HRC-S/LETG, looks OK 5) Telemetry signal dropped off from LGA-B more rapidly than expected. Switch to LGA-A allowed us to regain it near end of shift.