May_01_2003_L1379.txt Shift L1379 Start at 2003:121 11:00:00 GMT = 2003 MAy 1 7:00 am EDT End 2003 May 1 10:30 am EDT SOT shift report 2003-05-01 L1379 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or May_01_2003_L1379.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - TOO load APR3003B terminated last night by SCS 107 run. Radiation replan telecon held. Results below: SCS107 ran on Chandra at 2003:120:23:37:13, due to RADMON high radiation trigger (for unknown EPHIN channel at this time). Chandra was approaching radiation belts, but 107 trip was 11 hours before perigee and 2 hours before nominal RADMON disable. SCS107 ran nominally and SIs are correctly safed. Current attitude is good for several days. Momentum (current and extrapolated into the future) is good. FOT MP is planning new load. Plan: observe obsids 3803 (TOO = H 1743-322) and 3745 (ETA CARINAE) in next orbit. Obsid 3733 will dropped, and padtime on next radiation entry will be increased by at least 2 hours, up to 4 hours. Available comm periods for load uplink are 121:2010-2210 UT and 122:0100-0200 UT. Products should be out for review by about 121:1400 UT (10am EDT, 1 May). Current radiation levels are very low (under 20), but the geomagnetic field is at "unsettled to major storm" levels, thus the SCS107 trip. 3-day Solar-Geophysical Forecast issued Apr 30 at 22:00 UTC Solar Activity Forecast: Solar activity is expected to be at low to moderate levels. Region 349 has the potential for M-class events. Geophysical Activity Forecast: The geomagnetic field is expected to be at unsettled to active conditions. A combination of transient flow and coronal hole high speed flow are expected to keep the geomagnetic field disturbed for day one and day two of the period. No COMM this shift. Seq # ObsID It Target start time SI Grat RA dec roll ------------------------------------------------------------------------------------------------------- ORBITAL EVENTS: 2003:120:03:00:11.949 515 EAPOGEE ORBIT APOGEE 2003:121:04:35:38.721 515 EE1RADZ0 ELECTRON1 RADIATION ENTRY0 2003:121:10:44:04.351 515 EPERIGEE ORBIT PERIGEE 2003:121:15:31:38.721 516 XE1RADZ0 ELECTRON1 RADIATION EXIT0 2003:122:18:28:34.197 516 EAPOGEE ORBIT APOGEE 2003:124:01:39:32.642 516 EE1RADZ0 ELECTRON1 RADIATION ENTRY0 2003:124:02:13:06.714 516 EPERIGEE ORBIT PERIGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift 121:1100 Status at AOS was consistene with SCS107 trip (see note 1 below) End of shift 121:1430 NOTES/ISSUES/PROBLEMS --------------------- 1) Status at last COMM: UTC 2003:121:06:40:06 (May 1) f_ACE 1.64e+01 F_CRM 8.79e+08 Kp 3.0 R km 49005D OBT 2003:121:06:37:57 CTUVCDU 8009215 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 168158277.53 ONLVCDU 8009200 OBC Errs 0 OBSID 3997 EPState SUN SIM TTpos -99616 HETG Angle 79.46 PCADMODE NPNT RA 187.120 Bus V 30.24 SIM FApos -467 LETG Angle 77.96 PCONTROL NPNT Dec 17.108 Bus I 26.21 AOFSTAR GUID Roll 225.177 ACA Object SSSSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc NNNTTTTT Dith Yang -1.82 Yaw Rate -0.10 HRC-S HV ON ACA CCD Temp -10.4 Dith Zang 7.97 Pitch Rate 0.23 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.56 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.22 Batt 1 SOC 100.00% Avg HRMA Temp 70.63 FSS Beta -46.03 Batt 2 SOC 100.00% ACIS Stat7-0 66 Avg OBA Temp 51.05 SA Resolv 136.19 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 12.76 RadMon DISA HRMA power 126.10 SCS 128 INAC -Y SA Amps 13.14 EPHIN Geom LARG OBA power 102.90 SCS 129 INAC +Y SA Temp 112.35 E150 91.0 SCS 130 INAC -Y SA Temp 113.28 E300 1.3 Roll Mom. 7.314 SCS 107 DISA E1300 0.0 Pitch Mom. 2.235 UpL Cmd Acc 27843 EPH A-Leak 1.0200 P4GM 0.1 Yaw Mom. 6.319 Cmd Rej A 109 EPH B-Leak 0.6560 P41GM 0.0 Explanation Current Data: UTC 2003:121:11:40:01 (May 1) f_ACE 4.29e+01 F_CRM 0.00e+00 Kp 2.7 R km 31638A Currently scheduled FPSI, OTG : HRC-S NONE Estimated Kp : 3.00 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 4.29e+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 : 0.01 GOES-12 P5 flux, in RADMON P41GM units : 0.02 Orbit Start Time : 2003:121:10:49:00 Geocentric Distance (km), Orbit Leg : 31589 A CRM Region : 3 (Magnetosphere) External Proton Flux (p/cm^2-s-sr-MeV) : 2.14500000000e+01 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.00000000000e+00 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 3.00150000000e+04 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 0.00000000000e+00 HRC IM PS = OFF SP PS = ON Stps 43/54 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 = -119.9 DEA Pwr = 7.4 DPA Pwr = 12.5 Science State = Science Idle 2) Notes from 9:00am meeting: Operations (Darell): - 2 supports last 24 hrs, 1 34m, 1 26m - 1 SCS loaded but now loads are disabled due to SCS107 run - SCS107 ran at 120:2336 - Dump data current Mission Planning (Ken): - OBS 3997 interrupted by SCS107, but got 80% of it - Plan is to uplink replan load in the next COMM (2110 or sooner) and start at 2115. TOO observation will be done first. Will lose obs 4128 and 3733 in this load. - Need to move onto MAY05, which has momentum unload. S/C Engineering(Dan): - SCS107 tripped due to both E1300 and P4GM channels. - EPHIN levels spiked way up beyond the trip points, then dropped down again. - This was at 11 hours before perigee, or 2 hrs before radmon disable. - Got a yellow limit violation on fuel tank temp. This is due to long obs - Gyro still noisy. SOT(Bill): - See above notes on radiation, plus discussion below. DSOPS(Joy) - Several quick looks (see below). GOT/IST(Adam/Chris): - All OK Meetings/events: - 9:15am, IST daily tagup - 10:00am, IRU cal mtg - 12:00pm, load review - 1:00pm, Contractor telecon - 2:00pm, FDB 3) Quick look data: Seq # ObsID It Target start time SI Grat Comment ---------------------------------------------------------------------------------------------------- 500316 03837 0 TYCHO'S SNR 2003:119:02:15:48.872 147.4 ACIS-I NONE 700693 P3 04014 0 NGC4102 2003:120:19:41:26.233 4.9 ACIS-S NONE 700817 P2 04138 0 FIRST J122749+321459 2003:120:21:31:18.233 2.9 ACIS-S NONE 700676 P2 03997 0 NGC 4450 2003:120:22:48:25.233 4.9 ACIS-S NONE Radiation Discussion: A discussion of radzone entry and exit times was held. We have had two SCS107 trips in last two weeks, both due to radzone entry timing issues. We decided to disable radmon earlier for a couple of weeks while we sort this out. We will add 3 hours of radmon disable padding to the May 1 load to help ensure that we do not have a trip just prior to radmon disable. For the MAY05 and MAY12 loads we will disable radmon 11hrs and 15mins prior to perigee (fixed time).