Feb_01_2002_L925.txt Shift L925 Start at 2002:032:12:30:00 GMT = 2002 Feb 1 7:30am EDT End 2002 Feb 1 11:45pm EDT SOT shift report 2002-02-01 L925 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Feb_01_2002_L925.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Running TOO load JAN3102A on ascending leg. Observing 'BETA CRU' (obsid 2575) with ACOS-S/HETG. Current radiation levels continue moderate (proton flux under 1500). over past day. SpaceWeather.com: SOLAR STORM WARNING: Magnetic fields above sunspots 9800 and 9802 have stretched and twisted in recent days. Now, like taut rubber bands ready to snap back, the magnetic lines of force pose a threat for powerful X-class eruptions. An explosion from one of those active regions would likely be Earth-directed as they cross the center of the Sun this week. NOAA SEC: 3-day Solar-Geophysical Forecast issued Jan 31 at 22:00 UTC Solar Activity Forecast: Solar activity is expected to be at low to moderate levels. Region 9800 and Region 9802 have the potential for producing major events. Seq # ObsID It Target start time SI Grat RA dec roll slew ---------------------------------------------------------------------------------------------------------- JAN3102A: 200183 02575 00 BETA CRU 2002:032:02:47:33.506 75.5 ACIS-S HETG 191.9391 -59.7092 53.61 66.47 200165 02557 00 YY MEN, HD 32918 2002:033:00:10:04.791 75.4 ACIS-S HETG 74.4705 -75.2645 302.04 39.18 ORBITAL EVENTS: 2002:031:14:47:50.942 343 EPERIGEE ORBIT PERIGEE 2002:031:19:23:36.216 344 XE1RADZ0 ELECTRON1 RADIATION EXIT0 2002:032:22:30:46.673 344 EAPOGEE ORBIT APOGEE 2002:034:00:04:47.711 344 EE1RADZ0 ELECTRON1 RADIATION ENTRY0 2002:034:06:14:41.247 344 EPERIGEE ORBIT PERIGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift 032:1230 AOS DSS-24 (Goldstone 34m) 032:1545 (stste was nominal at AOS - see note 1) LOS DSS-24 032:1645 End of shift 032:1645 NOTES/ISSUES/PROBLEMS --------------------- 1) Status at AOS: UTC 2002:032:15:53:21 (Feb 1) f_ACE 6.96e+02 F_CRM 7.23e+07 Kp 2.0 R km 132588A OBT 2002:032:15:52:58 CTUVCDU 6058499 OBC s/w NRML FMT2_SSR CPEstat NORM OBT 128965978.73 ONLVCDU 6058488 OBC Errs 0 OBSID 2575 EPState SUN SIM TTpos 74424 HETG Angle 6.34 PCADMODE NPNT RA 191.942 Bus V 30.08 SIM FApos -467 LETG Angle 77.96 PCONTROL NPNT Dec -59.710 Bus I 24.94 AOFSTAR GUID Roll 53.614 ACA Object FFFSSSSS Dither ENAB HRC-I HV ON ACA ImFunc TTTTTTTT Dith Yang 1.29 Yaw Rate 0.08 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang 5.58 Pitch Rate 0.12 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.07 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.76 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta -0.88 Batt 2 SOC 100.00% ACIS Stat7-0 64 Avg OBA Temp 51.21 SA Resolv 90.37 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 11.98 RadMon ENAB HRMA power 56.70 SCS 128 INAC -Y SA Amps 12.76 EPHIN Geom LARG OBA power 97.90 SCS 129 ACT +Y SA Temp 116.95 E150 4.9 SCS 130 ACT -Y SA Temp 116.95 E300 0.2 Roll Mom. 6.087 SCS 107 INAC E1300 0.0 Pitch Mom. 18.792 UpL Cmd Acc 64930 EPH A-Leak 1.0200 P4GM 0.0 Yaw Mom. -4.048 Cmd Rej A 199 EPH B-Leak 0.3880 P41GM 0.0 Explanation Current Data: UTC 2002:032:15:53:21 (Feb 1) f_ACE 6.96e+02 F_CRM 7.23e+07 Kp 2.0 R km 132588A Currently scheduled FPSI, OTG : ACIS-S HETG Costello Kp : 2.00 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 6.96e+02 GOES-8 P2 flux, in RADMON P4GM units : 0.00 GOES-10 P2 flux, in RADMON P4GM units : 0.00 GOES-8 P5 flux, in RADMON P41GM units : 0.01 GOES-10 P5 flux, in RADMON P41GM units : 0.01 Orbit Start Time : 2002:031:14:54:01 Geocentric Distance (km), Orbit Leg : 132479 A CRM Region : 1 (Solar_Wind) External Proton Flux (p/cm^2-s-sr-MeV) : 6.96000000000e+02 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 1.39200000000e+02 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 2.79907183020e+08 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 7.23421415040e+07 HRC IM PS = ON Stp 42/53 SP PS = OFF Shield 1 HV = OFF Shield 2 HV = OFF Valid Event Rate 1 = 0 Valid Event Rate 2 = 0 Shield Event Rates = 0 ACIS FP Temp = -119.7 DEA Pwr = 55.8 DPA Pwr = 41.9 Science State = Science Active 2) Notes from 9:00am meeting: Operations (Craig): - 3 supports yesterday, 1 26m, 2 34m - Ran CAP 783 to interrupt JAN2802D, replace with TOO load JAN3102A - No loads uplinked, still good thru 035:0530 - Dumps current - OC's noted that EPS MSID EGCBDC1, "Battery prime disconnect sensor tripped" flag was set in pass after eclipse. See note 4 for explanation. Mission Planning (Ken): - FEB0402D loads approved. - FEB11 loads in process, however TOO request SN 2002ap may affect this load. If approved, TOO might be done at end of FEB04 load as a new TOO load or would be put into a revised FEB11 load. S/C Engineering(Rino): - All OK on satellite - First eclipse of season occurred yesterday (start at 031:1613). * See note 4 regarding EGCBDC1 flag SOT(Bill): - Radiation levels are moderate (protons under 1500) but spaceweather.com predicts possibility of X class flare from regions 9800 or 9802. DSOPS(Joy): - Four QL's, see below GOT(Mike/Chris): - All OK. Meetings/events: - Follow-up on EPS issue, time TBD (note 3) - 5pm, tagup with Chris Johnson on telemetry reply block error 3) Quick look data: Seq # ObsID It Target start time SI Grat Comment ---------------------------------------------------------------------------------------------------------- JAN2802D: 700462 03023 00 HS0810+2554 2002:030:20:46:08.708 5.0 ACIS-S NONE 600168 03432 00 IRAS 05189-2524 2002:030:23:05:26.733 15.3 ACIS-S NONE 500231 02781 00 VLA J0636+1838 2002:031:03:48:35.559 7.9 ACIS-I NONE JAN3102A: 500286 03436 00 GRB020127 2002:031:22:37:39.493 10.0 4) EPS Flag EGCBDC1 EPS MSID EGCBDC1, "Battery prime disconnect sensor tripped" flag being set is indicative of an increment in one of the EPS software's "glitch counters". In this case the "Battery Disconnect Circuit Check" glitch counter incremented by one during exit from the eclipse. An event identical to this occurred on mission day 283 (Oct 10, 1999). Analyses performed to evaluate the event are documented in Flight Notes 337 and 345B. The occurance of such a glitch does not indicate a problem onboard, but is a result of a timing condition within the Battery Circuit Check Flight Software and interaction with the EPS hardware. These glitches are expected to occur in about 1 of every 13 eclipses. The glitch limit values (values at which FSW would reconfigure the EPS HW) are set to 10, so immediate action is not required. However, we plan to uplink an existing load which clears these glitch counters. This will be done via a CAP either in tonight's COMM (033:0200-0300) or in an added COMM this afternoon.