Apr_19_2000_L271.txt Shift L271 Start at 2000:110:11:30:00 GMT = 2000 Apr 19 7:30pm EDT End 2000 Apr 19 12:00pm EDT See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Apr_19_2000_L271.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Running APR1600C, observing MRK 273X (obsid 00809) with ACIS-S (no grating) at start of shift. Maneuver to RX J1720.1+2638 (obsid 00304) using ACIS-I at 110:1502. Translate SIM to ACIS-I at 110:1523. ORBITAL EVENTS: 2000:108:02:24:16.415 96 EAPOGEE ORBIT APOGEE 2000:109:10:07:47.896 96 EPERIGEE ORBIT PERIGEE 2000:110:17:51:20.004 97 EAPOGEE ORBIT APOGEE 2000:112:01:34:15.067 97 EPERIGEE ORBIT PERIGEE 2000:113:09:18:25.737 98 EAPOGEE ORBIT APOGEE 2000:114:17:01:49.819 98 EPERIGEE ORBIT PERIGEE 2000:116:00:45:45.742 99 EAPOGEE ORBIT APOGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift LOS 110:1130 Status at last contact was nominal (see note 1) AOS DSS-24 (Goldstone) 110:1500 State at AOS was nominal (see note 2) 110:1506 304 Acquire 4 stars/3 fids LOS DSS-24 110:1600 End of shift 110:1600 NOTES/ISSUES/PROBLEMS --------------------- 1) UTC 2000:110:06:00:01 (Wed Apr 19) f_ACE 5.03e+01 F_ACE 4.38e+06 R km 129649A OBT 2000:110:05:59:37 CTUVCDU 3851007 OBC s/w NRML FMT2_NORM CPEstat OBT 72511177.99 ONLVCDU 3850992 OBC Errs 0 OBSID 809 EPState SUN SIM TTpos 75623 HETG Angle 80.2 PCADMODE NPNT RA 206.219 Bus V 30.71 SIM FApos -467 LETG Angle 78.7 PCONTROL NPNT Dec 55.920 Bus I 30.51 AOFSTAR GUID Roll 181.156 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 5.53 Yaw Rate -0.13 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang 4.15 Pitch Rate -0.23 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.15 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.18 Batt 1 SOC 100.00% Avg HRMA Temp 70.56 FSS Beta -23.11 Batt 2 SOC 100.00% ACIS Stat7-0 65 Avg OBA Temp 50.89 SA Resolv 113.00 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 121.20 -Y SA Amps 15.85 EPHIN Geom LARG OBA power 108.90 +Y SA Temp 112.04 E1300 2 -Y SA Temp 111.74 P4GM 0 Roll Mom. 4.148 SCS 128 P41GM 0 Pitch Mom. -6.611 SCS 129 UpL Cmd Acc 19581 A-Leak 0.4640 Yaw Mom. 5.807 SCS 130 Cmd Rej A 134 B-Leak 0.0720 Expected RA, Dec, Roll (degrees): 206.22204, 55.91872, 181.15313 2) Chandra state at 110:1545 (after completion of maneuver): WAS EXPECTED PCAD MODE = NPNT NPNT CONTROL LAW FLAG = NPNT NPNT Stars: = 4 4 FIDS = 3 3 RA = 260.035151 deg 260.03516 DEC = 26.669394 deg 26.66939 ROLL = 119.935183 deg 119.93517 Format = 2 2 OBSID = 304 304 SIM FA = -535 -536 SIM TSC = 89823 89822 HETGA = 80.21 deg (OUT) OUT HETGB = 81.96 deg (OUT) OUT LETGA = 79.46 deg (OUT) OUT LETGB = 78.71 deg (OUT) OUT EPHIN A-leak = 0.5080 B-leak = 0.0800 ACE Proton Flux = 28 (2 hr avg in 130-214 keV proton channel) Fluence (130-214KeV) = 2.1E+5 LT 3.6E+8 Radiation Level OK EPHIN Geom = LARG E1300 = 2 LT 1318.52 (RADMON P4GM = 0 LT 3542.40 Triggers) P41GM = 0 LT 100.00 HRC SP PS = ON IM PS = OFF SP Top Step = 43 SP Bot Step = 54 Shield 1 HV = OFF Shield 2 HV = ON Shield 2 Stp = 8 Valid Event Rate 1 = 0 Valid Event Rate 2 = 0 Shield Event Rates = 3850 ACIS FP Temp = -119.9 Cold Radiator = -127.9 DEA Pwr = 43.3 DPA Pwr = 42.0 3) Notes from 9:00am meeting: Operations yesterday (Darrel Wicker): - 3 supports in last day, 4 dumps Problems with dump on DSS-46. Trouble locking up, etc. Finally got 35 good minutes of data at lower data rate. Downlink up to date as defficiency was made up on next pass. - Uplinked one more load segment. Good till 114:0913. Mission Planning (Ken/Dan/Paul/Kevin): - APR2300 approved (first segment to be uplinked Friday). - Kevin working APR30 load. Will try to put maneuvers in to limit rise in ACIS FP temp thru perigee. - Dan Shropshire doing a study of momentum build-up due to implementation of above maneuvers. - Offline release 8.1a installed now on OFFLINE 1 & 2. Will do a test run (MAR12) to see if all is OK, then baseline the system (by Friday will be in final config). Spacecraft Engineering (Jeff/Wallace): - Transmitter limit violation: "Spacecraft eng'ng: Jeff reports the B side XMTR power output limit tripped (it was "real"). The reading was 69.945 over a limit of 69.9. This has happened several times. It is being investigated with TRW West" was discussed with West Coast RF personnel. Its not trending up, has happened 3 times in mission. Possibly the limits are too tight. No cause for concern. - Running fine attitude initialization procedure on ASVT today. SOT (Bill Podgorski): - Radiation levels well below limits. ASCDSOPS(Joy Nichols): - One quick look today (see below). - Manually processing last night's TOO (obsid 1701). Need STARCAT ID's (will get them after meeting). GOT (Mike Ambrose): - Closer inspection of DSS-16 automation testing indicates there were some problems after all. - GRETA crashed last night. GOT investigating. 4) Quick Look data review: OBSID Target Time Instrument Comment ----- ------ -------------- --------------- --------------- 00797 NGC 4631 000:107:16:44 ACIS-S OK