SOT Shift Report 2005-04-07 L2086 Shift L2086 Duration: 7 Apr 2005 08:30 EDT - 7 Apr 2005 10:00 EDT 7 Apr 2005 12:30 GMT - 7 Apr 2005 14:00 GMT SOT Lead: Tom Aldcroft ======================================== Plan ---- Continue with APR0605A replan load: study the unusual galaxy cluster A1569 that has two bright radio galaxies; continue the Groth strip survey; and continue the survey of a complete sample of z>0.35 galaxy cluster; then into perigee: 06100 0 Abell 1569 2005:097:09:16:57.058 41.7 ACIS-I NONE 05848 1 EGS-4 2005:097:21:18:53.058 45.0 ACIS-I NONE 05781 0 cl1312+3900 2005:098:10:07:38.006 27.0 ACIS-I NONE T_E83 CAL-ER (59707) 2005:098:18:14:18.014 10.2 -- -- T_X84 CAL-ER (59706) 2005:099:05:04:20.993 20.8 -- -- Events ------ No comm this shift Notes from 9am meeting ---------------------- Ops: In Radiation Zone NO Current SI ACIS-I Grating NONE Observation ID 06100 Target Abell 1569 Altitude 117.3 kkm Asc Radmon Disable 098/17:47z Next Radiation Zone 098/21:04z to 099/08:25z MP: - APR0605A replan load (due to SCS107 trip) generated, reviewed and uplinked - APR1105 load is on hold pending a decision on a fast turnaround TOO Eng: - The EPHIN temperature exceeded 107 F, which was anticipated as a result of continuing with the original observation sequence in the APR0605 replan despite having gone through perigee at a relatively warm attitude. This was accompanied by a droop in the EPHIN 27V rail voltage down to nearly 10V. As of the last pass (day 97, 12UT) the voltage had recovered to 13.4V. It is quite possible that the voltage will not recover prior to the next rad zone entry (2005:098:17:47:44), so there is an elevated risk of another spurious SCS107 trip. - A temperature sensor on the fuel fill panel was toggling above the yellow limit during the last 24 hours. This is not a safety concern as the sensor limit is based on the operational limits of a valve that is now permanently disabled. This limit is one of many that are being revised to reflect the current operational state of Chandra. - SCS 29 is still active and needs to be disabled Radiation: - The sun continues to be very quiet, with the ACE P3 rate around 50. The slight elevation is due to a couple of geoeffective coronal hole streams - Solar Activity Forecast: Solar activity is expected to be very low to low. - Geophysical Activity Forecast: The geomagnetic field is expected to be quiet to unsettled. Quicklooks ---------- 5814 MACJ2219.. ACIS-I NONE OK 6141 Crab nebula ACIS-S HETG OK 5764 CL0333.. ACIS-I NONE OK 5619 Maffei 1 ACIS-S NONE OK 5426 V710 Tau ACIS-S NONE OK Snapshot -------- Snapshot matches expected configuration except for EPHIN 27V rail voltage droop: UTC 2005:097:12:02:05 (Apr 7) f_ACE 4.33e+01 F_CRM 6.74e+08 Kp 2.3 R km 122411A OBT 2005:097:11:59:11 CTUVCDU 11583103 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 229262351.65 ONLVCDU 11583088 OBC Errs 0 OBSID 6100 EPState SUN SIM TTpos 92903 HETG Angle 79.09 PCADMODE NPNT RA 189.165 Bus V 29.61 SIM FApos -535 LETG Angle 77.59 PCONTROL NPNT Dec 16.633 Bus I 29.75 AOFSTAR GUID Roll 197.062 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 7.48 Yaw Rate 0.19 HRC-S HV ON ACA CCD Temp -15.6 Dith Zang -3.51 Pitch Rate 0.15 SHLD HV 8.0 ACA Int Time 1.698 Roll Rate 0.07 EVT RT 0 AOACSTAT OK FSS SunBeta NSUN SHLD RT 16 FSS Alfa -17.83 Batt 1 SOC 100.00% Avg HRMA Temp 70.58 FSS Beta -49.75 Batt 2 SOC 100.00% ACIS Stat7-0 64 Avg OBA Temp 52.97 SA Resolv 155.63 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 14.88 RadMon ENAB HRMA power 113.60 SCS 128 ACT -Y SA Amps 14.68 EPHIN Geom SMAL OBA power 89.40 SCS 129 ACT +Y SA Temp 113.58 E150 21.3 SCS 130 ACT -Y SA Temp 114.81 E300 3.6 Roll Mom. -2.361 SCS 107 INAC E1300 4.6 Pitch Mom. 7.451 UpL Cmd Acc 55489 EPH A-Leak 1.0200 P4GM 0.0 Yaw Mom. 16.970 Cmd Rej A 73 EPH B-Leak 0.0000 P41GM 0.0 EPH temp 99.88 Gyro 2 Curr 1 103.20 Roll Bias -0.8654 EPH 27V 13.42 M Unload MON Gyro 2 Curr 2 98.40 Pitch Bias -2.0216 TSC Move STOP Prop. line 03 94.35 Yaw Bias -1.1384 CTX A PWR 36.38 FA Move STOP Prop. line 04 80.62 CTX A Volts 3.52 OTG Move DISA Explanation Current Data: UTC 2005:097:13:37:02 (Apr 7) f_ACE 4.26e+01 F_CRM 6.76e+08 Kp 2.3 R km 124156A Currently scheduled FPSI, OTG : ACIS-I NONE Estimated Kp : 2.33 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 4.26e+01 GOES-10 P2 flux, in RADMON P4GM units : 0.00 GOES-12 P2 flux, in RADMON P4GM units : 0.00 GOES-10 P5 flux, in RADMON P41GM units : 0.02 GOES-12 P5 flux, in RADMON P41GM units : 0.01 Orbit Start Time : 2005:096:11:09:01 Geocentric Distance (km), Orbit Leg : 124108 A CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 2.55359000000e+02 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 2.55359000000e+02 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.54350347845e+10 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 6.75757397430e+08