Apr_03_2001_L621.txt Shift L621 Start at 2001:093:11:30:00 GMT = 2001 Apr 3 7:30am EDT End 2001 Apr 3 12:00pm EDT SOT shift report 2001-04-03 L621 See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Apr_03_2001_L621.txt SOT Lead Bill Podgorski SOT SC/ACA FOT-SI HRC-SI ACIS-SI OTHER Plan: - Running APR0201D, on day 093 at the beginning of the 0700-0800 UT pass it was noted that RADMON had tripped and SCS107 had run successfully, exact time was 093:0222 UT during OBSID 1578. ACIS is safe, S/C attitude is good for several days. Will assess this morning and start replan. An X17 class (VERY LARGE!) solar flare erupted at 2150 UT on April 2nd. The CME was mostly non-earth directed(??). The hard proton flux as measured by GOES-8 rose sharply just before 0000 UT on April 3. The soft proton flux is about 6000 and slowly rising. Planned Observations: Seq # ObsID It Target start time SI Grat RA dec roll slew ---------------------------------------------------------------------------------------------------------- 600135 01578 00 NGC4111 2001:093:00:56:05.178 13.8 ACIS-S NONE 181.7766 43.0839 193.86 13.54 700335 02145 00 1928+738 2001:093:05:14:05.178 9.2 ACIS-S NONE 291.9989 73.9460 82.27 54.64 700333 02143 00 1641+399 2001:093:08:11:38.401 9.2 ACIS-S NONE 250.7743 39.7997 115.70 39.31 900062 02235 00 XMM 13HR - FIELD 4 2001:093:11:12:58.401 27.6 ACIS-I NONE 203.5555 37.9353 164.45 40.49 900063 02236 00 XMM 13HR - FIELD 1 2001:093:19:01:28.401 27.6 ACIS-I NONE 203.7241 38.0185 164.72 0.40 900064 02237 00 XMM 13HR - FIELD 2 2001:094:02:49:58.401 27.6 ACIS-I NONE 203.6607 37.8027 165.20 0.49 900065 02238 00 XMM 13HR - FIELD 3 2001:094:10:38:28.401 27.5 ACIS-I NONE 203.8290 37.8858 165.43 0.37 ---- T_E29 CAL-ER 2001:094:19:02:02.464 10.2 -- -- 278.0000 28.0000 97.99 0.01 ---- GG_29 00 CAL-ER 2001:095:02:34:30.000 3.6 -- -- 181.5000 23.8000 204.04 138.66 ---- T_X30 00 CAL-ER 2001:095:06:45:44.965 10.0 -- -- 170.5000 23.4000 221.18 16.22 800128 01660 00 V 1121+2327 2001:095:10:00:24.965 72.1 ACIS-I NONE 170.2045 23.4363 221.64 0.44 500177 02000 00 CRAB NEBULA 2001:096:06:35:28.982 22.5 ACIS-S NONE 83.6141 22.0331 272.06 79.05 ---- I1013 00 CAL-ER 2001:096:13:34:41.252 3.0 -- -- 318.5700 28.6600 79.15 129.17 390005 01013 00 PKS2155-304 2001:096:14:56:16.853 27.0 HRC-S LETG 329.7439 -30.2336 122.15 72.42 ORBITAL EVENTS: 2001:092:11:51:19.190 EPERIGEE 228 ORBIT PERIGEE 2001:093:19:34:50.593 EAPOGEE 229 ORBIT APOGEE 2001:095:03:19:46.149 EPERIGEE 229 ORBIT PERIGEE 2001:096:11:02:40.332 EAPOGEE 230 ORBIT APOGEE 2001:097:18:46:27.383 EPERIGEE 230 ORBIT PERIGEE 2001:099:02:29:47.513 EAPOGEE 231 ORBIT APOGEE EVENTS DONE OBSID -------------- ---- ----- Start Shift 093:1130 AOS DSS-16 (Goldstone 26m) 093:1510 1578 (status at AOS, see note 1) EPHIN rates still high, E1300 4Xtrigger, P4GM 093:1638 a little lower than trigger and P41GM about equal to trigger. LOS DSS-16 093:1700 End of shift 093:1645 NOTES/ISSUES/PROBLEMS --------------------- 1) Status at AOS: Load not running. Interrupted during OBSID 1578. UTC 2001:093:15:22:00 (Apr 3) f_ACE 5.78e+03 F_CRM 1.16e+08 Kp 1.0 R km 138800A OBT 2001:093:15:21:35 CTUVCDU 4214655 OBC s/w NRML FMT2_SSR CPEstat NORM OBT 102698495.16 ONLVCDU 4214640 OBC Errs 0 OBSID 1578 EPState SUN SIM TTpos -99615 HETG Angle 79.84 PCADMODE NPNT RA 181.775 Bus V 30.40 SIM FApos -467 LETG Angle 78.34 PCONTROL NPNT Dec 43.085 Bus I 30.51 AOFSTAR GUID Roll 193.859 ACA Object SSSSSSSS Dither ENAB HRC-I HV ON ACA ImFunc NNNTTTTT Dith Yang 1.89 Yaw Rate -0.35 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang 5.50 Pitch Rate -0.15 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.08 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa 0.34 Batt 1 SOC 100.00% Avg HRMA Temp 70.58 FSS Beta -40.72 Batt 2 SOC 100.00% ACIS Stat7-0 66 Avg OBA Temp 50.97 SA Resolv 130.98 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 RadMon DISA HRMA power 100.30 SCS 128 INAC -Y SA Amps 15.46 EPHIN Geom SMAL OBA power 75.50 SCS 129 INAC +Y SA Temp 113.89 E150 14975.6 SCS 130 INAC -Y SA Temp 114.20 E300 335.4 Roll Mom. 5.527 SCS 107 DISA E1300 30.0 Pitch Mom. -2.343 UpL Cmd Acc 56270 EPH A-Leak 0.6560 P4GM 196.5 Yaw Mom. -6.050 Cmd Rej A 177 EPH B-Leak 0.1200 P41GM 7.5 Current Data: UTC 2001:093:15:22:00 (Apr 3) f_ACE 5.78e+03 F_CRM 1.16e+08 Kp 1.0 R km 138800A Currently scheduled FPSI, OTG : HRC-S NONE Costello Kp : 1.00 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 5.78e+03 Orbit Start Time : 2001:092:11:54:00 Geocentric Distance (km), Orbit Leg : 138759 A CRM Region : 2 (Magnetosheath) External Proton Flux (p/cm^2-s-sr-MeV) : 1.17720830000e+04 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 0.00000000000e+00 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 6.88880110740e+08 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.15730331030e+08 HRC SP PS = OFF IM PS = ON Steps 42/53 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 = 30.9 DPA Pwr = 12.5 Science State = Science Idle 2) Notes from 9:00am meeting: Operations (Leon): - Loads inactive due to RADMON TRIP (See below) - 2 34m supports yesterday, dumps up to date Mission Planning (Ken): - APR09 loads out for review, will not plan load review telecon to allow time for replan S/C Engineering(Jeff): - RADMON TRIP at 093:0222 UT during OBSID 1578. Attitude good until 095:0125, when earth violation of ACA FOV occurrs. Replan details below. SOT(Bill): - ACE flux levels in 130-214 keV channel about 5000-6000. GOES rates high but trending down. DSOPS(Jen) - One quick look (see below) - Two stars never acquired for obsid 2062. FOT to investigate. GOT(Mike/Chris): - All is OK. Meetings/events: - 9:30am, CAP review - 12pm, Tony Lavoie action item telecon - "Passport to Knowledge" TV broadcast 1pm-2pm Roger: - OTG telecon held late yesterday. Discussions centered on the method of patching the flight software, specifically, the lowest risk approach. TRW West's proposed approach (roughly) is to patch K constants in the executive which will prevent the new OTG software from running until the patch was fully loaded, then unpatch these values to allow it to run. Two alternatives were also discussed; 1) making the first patch load contain a "return" statement which would return control back to the executive, patching the software over the old software, then unpatching the "return" statement and allowing the new OTG code to run, 2) loading the patch in unused memory, then changing the pointer to point to the new code after it was fully loaded. - Tony and Leon requested a short trade study which would identify the best approach for making large patches, realizing that we had time to review this and it would serve for other large patches as well. A minimum of two weeks will be needed to complete this and get ready for the checkout (depends on results of trade study). 3) Quick look data: Seq # ObsID It Target start time SI Grat Comment ---------------------------------------------------------------------------------------------------------- 700283 02093 00 NGC 3783 2001:090:04:00:11.920 168.1 ACIS-S HETG Some hot spots on image. ACIS team identified bad bias values. Are working issue. 4) We had a RADMON trip last night at 093:0222 UT. SCS 107 ran successfully, stopping the loads and safing ACIS. This occurred during OBSID 1578, and was picked up during the 093:0700-0800 UT COMM. The current S/C attitude is good until 095:0125 (9:25pm EDT April 4, or tomorrow night), at which time we have an earth violation in the ACA field of view. A replan meeting after today's 9am developed the following plans: Case 1: Build load for uplink tonight during the 094:0010-0210 COMM (8:10-10:10pm tonight). Observing will begin with obsid 2237 at 094:0249. An ACIS CTI measurement will be put into this load for the time period 094:1900-2200 (3pm-6pm tomorrow). A CAP will be executed during tonight's COMM to re-enable SCS 107. This plan will be implemented if the radiation levels are low enough: E1300 < 10.0/3 (1/3 of trigger levels) P4GM < 300.0/3 P41GM < 8.47/3 ACE proton channel 130-214 keV flux < 25,000 Case 2: Build load for uplink tomorrow during the 94:1900-2200 (3pm-6pm tomorrow) COMM. This load will be segmented such that the first segment will contain a maneuver to a safe attitude for perigee passage and preparations for rad zone entry. The remaining segments will pick up the observing program starting with obsid 1660, after the next perigee passage. The plan will be to uplink the first segment at the beginning of the COMM, then run a real-time ACIS CTI measurement per CAP 718B (radiation levels permitting). The other load segments will be uplinked after the CTI is kicked off, again, radiation permitting.