SOT shift report 2006-07-20 L2555 File created at 2006:201:14:30 UTC = 10:30 AM Jul-20-2006 EDT End 11:00:00 AM EDT SOT Lead: Ed Kellogg Today is the 7th anniversary of the first attempt to launch Chandra. We went out to the launch site at KSC, and went back to our hotels after the launch was delayed. "When the launch countdown stopped abruptly with seven seconds to go...a spontaneous groan arose from the...people gathered at the...site. Anticipation had built steadily throughout the day as the launch countdown had proceeded without a hitch. Even the weather had cooperated and no thunderstorms had developed in the sweltering heat. This looked like a perfect launch opportunity. As we were to learn later, it had indeed been a perfect launch opportunity. It turned out that the hydrogen leak indicator that caused controllers to halt the launch was in error. Another check by sensors eight seconds later showed that there was no problem. But by then, the right steps for safety had been taken, and the launch had been scrubbed." - http://chandra.harvard.edu/chronicle/archives/archives99.html We had a moment of remembrance and celebration at this morning's 9:00 meeting, punctuated by cake and ice cream! Thanks were expressed to all who have made Chandra a marvelously successful space astronomy observatory. PLAN ---- OBSID 06567, 4U 1728-34 2006:199:20:13:06.171 151.7 ACIS-S HETG, continuing; then 07335, PSR B1931+24 2006:201:15:01, ACIS-S NONE - PSR B1931+24 has the surprising peculiarity of being a 813ms radio-pulsar for ~5d and being radio quiet for the following 25-35d, periodically. Is it in an eccentric orbit, acting like a radio pulsar at apastron and like an x-ray binary at periastron? RADIATION SUMMARY ----------------- Solar soft proton flux is very low (http://www.srl.caltech.edu/ACE/ASC/) Significant solar activity: The solar flare activity level was very low. No C class events were recorded yesterday. (http://www.dxlc.com/solar/). GOES x-ray flux: very quiet. CMEs reported for past two days: July 17-19: No partly or fully Earth directed CMEs were detected in LASCO imagery. (http://www.dxlc.com/solar/- Jan Alvestad) Radiation Measurement Observed Observed/Limit --------------------- -------- -------------- ACE 2 hr fluence 1.3E+05 1/2844.3 (http://www.srl.caltech.edu/ACE/ASC/) GOES-11/P2 4-9 MeV protons `P4GM' 1.0E-01 1/922.3 GOES-11/P5 40-80 MeV protons `P41GM' 1.7E-02 1/46.7 (http://sec.noaa.gov/ftpdir/lists/pchan/G11pchan_5m.txt) *ACIS* Orbital fluence (since perigee) 5.9E+05 1/1683.5 (http://asc.harvard.edu/mta/alerts/current.dat) EPHIN rates (cts/cm^2-s-sr) at last comm. OBSERVED ---------------------------------------- -------- E1300 (2.64-6.18 MeV electrons): 0.0; RADMON limit = 20 P4GM (5-8.3 MeV protons): 0.0; RADMON limit = 300 P41GM (41-53 MeV protons): 0.0; RADMON limit = 8.47 (http://cxc.harvard.edu/cgi-gen/mta/Snap/snap.cgi?action=Latest) ACIS focal plane temperature -119.1 C, at dddZhh:mm:ss 201Z14:04:12 (http://asc.harvard.edu/acis/RT/acisrt.html) REAL TIME OBSERVATIONS UTC OBSID ---------------------- --- ----- 3 fids, 5 stars 950 6567 Notes from 9 am meeting ------------------------ OPS: Passes 4 Supports Completed (2 34 Meter, 2 26 Meter) from 200/1300 - 201/1300 Dump status Current Data loss None Last load segment ends 2006:204:11:54 CAPs, last 24h: None Next passes(yyyy:ddd:BOT-EOT)2006:201:2250-2350 2006:202:1040-1140 MP: JUL2406 products are approved. S/C: We had a good technical meeting yesterday on the prop line temperature safing monitor patch work. At today's Flight Director Board, we'll review this topic in preparation for approving and uplinking this patch. GOT/IST: - DATA: - SOT: MEETINGS -------- Data ---- On colossus (/dsops/GOT/input), - Jul 20 04:20 2006_200_2147_201_0413_Dump_EM_40804.gz. Evaluation of QL data --------------------- Target: SI SOT Eval. ------------------- ---------- ---------- (no new quick look data; we are still in the middle of a very long observation.) --------------------- NOTES/ISSUES/PROBLEMS --------------------- SNAPSHOT -------- UTC 2006:201:12:46:01 (Jul20) f_ACE 0.00e+00 F_CRM 4.52e+07 Kp 1.0 R km 99288D OBT 2006:201:04:44:15 CTUVCDU 1842175 OBC s/w NRML FMT2_NORM CPEstat NORM OBT 269757855.70 ONLVCDU 1842160 OBC Errs 0 OBSID 6567 EPState SUN SIM TTpos 74031 HETG Angle 5.96 PCADMODE NPNT RA 262.969 Bus V 30.08 SIM FApos -467 LETG Angle 77.59 PCONTROL NPNT Dec -33.818 Bus I 28.24 AOFSTAR GUID Roll 283.518 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang 7.22 Yaw Rate -0.45 HRC-S HV ON ACA CCD Temp -15.6 Dith Zang -7.48 Pitch Rate -0.12 SHLD HV 8.0 ACA Int Time 1.698 Roll Rate -0.12 EVT RT 0 AOACSTAT OK FSS SunBeta NSUN SHLD RT 19 FSS Alfa -17.43 Batt 1 SOC 100.00% Avg HRMA Temp 70.63 FSS Beta 49.56 Batt 2 SOC 100.00% ACIS Stat7-0 65 Avg OBA Temp 52.25 SA Resolv 146.74 Batt 3 SOC 100.00% Cold Rad -125.5 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -82.0 OBA Trng Fault NFLT +Y SA Amps 13.91 RadMon ENAB HRMA power 17.30 SCS 128 ACT -Y SA Amps 13.91 EPHIN Geom LARG OBA power 73.30 SCS 129 ACT +Y SA Temp 109.89 E150 0.8 SCS 130 ACT -Y SA Temp 111.74 E300 0.0 Roll Mom. 4.305 SCS 107 INAC E1300 0.0 Pitch Mom. -13.549 UpL Cmd Acc 23096 EPH A-Leak 1.0200 P4GM 0.0 Yaw Mom. 2.342 Cmd Rej A 133 EPH B-Leak 0.7960 P41GM 0.0 EPH temp 84.10 Gyro 2 Curr 1 103.20 Roll Bias -0.9967 M Unload MON Gyro 2 Curr 2 98.40 Pitch Bias -2.0794 CTX A PWR 36.43 TSC Move STOP Prop. line 03 77.56 Yaw Bias -1.2136 CTX A Volts 3.52 FA Move STOP Prop. line 04 52.10 OTG Move DISA