SOT Shift Report Shift M123 Duration: 23 Nov 1999 12:00 EST - 23 Nov 1999 16:00 EST 23 Nov 1999 17:00 GMT - 23 Nov 1999 21:00 GMT SOT Lead: Tom Aldcroft Spacecraft/Aspect: FOT/Science Liason: HRC: ACIS: ======================================== Plan ---- Continue with P27, observing Chandra Southern deep field (obsid=1431) Events ------ 20:58 Successful SSR dump Status ------ PCAD MODE = NPNT CONTROL LAW FLAG = NPNT Stars: = 5 FIDS = 3 RA = 53.093 deg DEC = -27.823 deg ROLL = 353.637 deg Format = 2 OBSID = 1431 SIM FA = -535 SIM TSC = 92903 (ACIS-I) HETGA = 80.96 deg (OUT) HETGB = 81.34 deg (OUT) LETGA = 80.21 deg (OUT) LETGB = 79.08 deg (OUT) EPHIN A-leak = 0.2520 B-leak = 0.0400 ACIS = Observing HRC = All HV is OFF Notes/Issues/Problems --------------------- - ACIS PMON on malang is beeping once every few seconds and displaying message: ALERT: BIAS ERROR THRESHOLD EXCEEDED BY FEP_2 I called Peter Ford who looked at realtime data via colossus and found no such problem. The colossus display was about 20 seconds behind PMON, and Peter concluded that the bias error report is incorrect, perhaps due to garbled telemetry at some point. - HRC EGSE was not receiving data and connection had to be recycled. I called John Chappel and he talked me through the process. - COMM was extended to allow another SSR playback. In the final dump, CFC errors indicate 98.0% data recovery, which is right at the allowed limit. There was momentarily a question about whether to accept the dump. However, that would ensure filling the A-side recorder, along with a minimum of 2 minutes of lost data as the swap to B-side takes place. There would be further data loss when swapping back to A. Snapshot -------- UTC 1999:327:21:02:01 (Tue Nov 23) f_ACE 1.33e+02 F_ACE 3.80e+07 R km 142195D OBT 1999:327:21:00:49 CTUVCDU 2637311 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 59778049.41 ONLVCDU 2637304 OBC Errs 0 OBSID 1431 EPState SUN SIM TTpos 92903 HETG Angle 81.0 PCADMODE NPNT RA 53.092 Bus V 30.24 SIM FApos -535 LETG Angle 79.1 PCONTROL NPNT Dec -27.824 Bus I 30.01 AOFSTAR GUID Roll 353.637 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang -1.76 Yaw Rate -0.00 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang 7.92 Pitch Rate 0.02 OBSMode NEXT ACA Int Time 1.698 Roll Rate 0.03 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -1.32 Batt 1 SOC 100.00% Avg HRMA Temp 70.58 FSS Beta -41.72 Batt 2 SOC 100.00% ACIS Stat7-0 65 Avg OBA Temp 50.81 SA Resolv 131.91 Batt 3 SOC 100.00% Cold Rad -120.7 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -82.0 OBA Trng Fault NFLT +Y SA Amps 14.30 HRMA power 76.50 -Y SA Amps 15.07 EPHIN Geom LARG OBA power 32.30 +Y SA Temp 118.05 E1300 1 -Y SA Temp 119.15 P4GM 0 Roll Mom. -3.088 P41GM 0 Pitch Mom. -10.606 UpL Cmd Acc 31186 A-Leak 0.2520 Yaw Mom. -0.212 Cmd Rej A 186 B-Leak 0.0400