SOT Shift Report Shift M616 Duration: 29 Mar 2001 13:00 EST - 29 Mar 2001 15:00 EST 29 Mar 2001 18:00 GMT - 29 Mar 2001 20:00 GMT SOT Lead: Tom Aldcroft Spacecraft/Aspect: FOT/Science Liason: HRC: ACIS: ======================================== Plan ---- Continue with MAR2301C load and watch radiation rates. Use HETG for time-resolved coronal spectroscopy of the short-period active binary ER VUL, then into perigee: 01887 00 ER_VUL 2001:088:03:52:02.532 113.4 ACIS-S HETG T_E27 CAL-ER 2001:089:11:55:08.360 8.6 -- -- Events ------ 18:00 AOS on DSS-46 19:39 LOS Notes/Issues/Problems --------------------- - ACIS FP temperature -119.9 C - EPHIN rates (in particular electrons) are high, within a factor of ~3 of safing the SI's: EPHIN rates (cts/cm^2-s-sr) OBSERVED RADMON limit ------------ ------------- ==> E1300 (electrons, 2.64 - 6.18 MeV): 2.8 10.0 P4GM (protons, 5.0 - 8.3 MeV): 9.1 300.0 P41GM (protons, 41 - 53 MeV): 0.5 8.47 EPHIN rates were steady over the duration of the COMM pass - ACE proton rates have been moderate and fluctuating somewhat for the last 1.5 days. Electrons jumped by 2 orders of magnitude at ~12:00 UT, indicating possible trouble on the way. ACE 130-214 keV proton fluences (p/cm2-sr-MeV) and Costello predicted activity index OBSERVED SOT alert ------------ ------------- 2-hour Fluence: 1.6E7 3.6E+8 Orbital Fluence: 1.2E8 1.0E+9 Kp: 2.3 6.0 - A major class X1.7/1N solar proton flare was observed erupting from the mammoth naked-eye sunspot group identified as Region 9393 at 10:15 UTC (5:15 am EST) on 29 March. (See http://www.spacew.com/astroalert.html) Snapshot -------- Current spacecraft configuration matches predicted state: UTC 2001:088:19:21:00 (Mar29) f_ACE 1.46e+03 F_CRM 1.23e+08 Kp 2.3 R km 136226D OBT 2001:088:19:20:28 CTUVCDU 2584735 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 102280828.65 ONLVCDU 2584720 OBC Errs 0 OBSID 1887 EPState SUN SIM TTpos 74423 HETG Angle 6.34 PCADMODE NPNT RA 315.622 Bus V 30.71 SIM FApos -467 LETG Angle 78.34 PCONTROL NPNT Dec 27.787 Bus I 25.45 AOFSTAR GUID Roll 73.509 ACA Object FFFSSSSS Dither ENAB HRC-I HV ON ACA ImFunc TTTTTTTT Dith Yang -6.19 Yaw Rate 0.28 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang 7.30 Pitch Rate 0.03 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.08 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa 0.38 Batt 1 SOC 100.00% Avg HRMA Temp 70.63 FSS Beta 33.96 Batt 2 SOC 100.00% ACIS Stat7-0 65 Avg OBA Temp 51.21 SA Resolv 55.51 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 37.40 SCS 128 ACT -Y SA Amps 12.95 EPHIN Geom LARG OBA power 8.10 SCS 129 ACT +Y SA Temp 112.66 E150 2575.6 SCS 130 ACT -Y SA Temp 112.97 E300 79.7 Roll Mom. -2.841 SCS 107 INAC E1300 2.8 Pitch Mom. 2.185 UpL Cmd Acc 51073 EPH A-Leak 0.7160 P4GM 9.1 Yaw Mom. -1.415 Cmd Rej A 43 EPH B-Leak 0.1320 P41GM 0.5 Current Data: UTC 2001:088:19:21:00 (Mar29) f_ACE 1.46e+03 F_CRM 1.23e+08 Kp 2.3 R km 136226D Currently scheduled FPSI, OTG : ACIS-S HETG Costello Kp : 2.33 ACE EPAM P3 Proton Flux (p/cm^2-s-sr-MeV) : 1.46e+03 Orbit Start Time : 2001:087:04:59:00 Geocentric Distance (km), Orbit Leg : 136270 D CRM Region : 2 (Magnetosheath) External Proton Flux (p/cm^2-s-sr-MeV) : 5.61649000000e+03 Attenuated Proton Flux (p/cm^2-s-sr-MeV) : 1.12329800000e+03 External Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.48752706434e+09 Attenuated Proton Orbital Fluence (p/cm^2-sr-MeV) : 1.22647678128e+08 Quicklook --------- Obsid Object Status ----- ------ ------ 1939 4U 1636-53 OK. There is a 20 arcsec Y-offset in this observation (from the OR), so that the zero-order is displaced within the blanking box.