Oct_06_1999 Shift M75 Start at 1999:279:16:00:00 GMT End 279:21:00:00 GMT See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Oct_06_1999_M75.txt. SOT Lead Ed Kellogg SOT FP Paul Plucinsky FOT-SI HRC-SI ACIS-SI OTHER ANNOUNCEMENT ------------ We have a couple of new features that you will find useful for following Chandra. 1) See http://hea-www.harvard.edu/SOT/SOTfrm.html, and click on "snapshot." This is a page of frequently updated text that tells just about everything you want to know about the spacecraft in very condensed form. I was able to read it without any instructions. Let us know if you need a rosetta stone. This nice feature was created and announced earlier by Rob Cameron. 2) Also see http://hea-www.harvard.edu/SOT/SOTfrm.html, and click on "comm.ps." Here, you'll see a table of DSN Station passes, orbit events, and SOT Lead OCC assignments. This will help you to plan when "snapshot" will be giving you live data, as well as to know about other scheduled events, and who's supposed to be at 617-496-7033, SOT Manager Console at OCC. You can email emk@cfa.harvard.edu with comments on this entry. Plan: - Running P20d load, do CAP 465 to go for 3x3 mode from 5x5 in ACIS. EVENTS DONE OBSID -------------- ---- ----- Start Shift, LOS 1600 AOS 1700 124 Playback; took a couple of tries 1705 Begin CAP 465 1732 ACIS stop science 1736 Change OBSID 1737 1387 ACIS Start science 1740 Biases up through FEP 3, row 414 before loss of COM 1759 LOS 1800 ----- Out of Contact ------ NOTES/ISSUES/PROBLEMS --------------------- Paul Plucinsky's report: The "ACIS Realtime Intervention Team" was at work this afternoon. We interrupted OBSID 124 with CAP 465. The point was to switch the observation from 5x5 Faint mode to 3x3 Faint mode. We were successful; the new observation is underway with OBSID 1387. I was able to watch the TLM during the first 30 minutes of the pass and the average count rate varied from 54 to 72 c/s. After issuing the stopScience command, the event buffer cleared in 10s. This indicates that at least the last part of the observation was NOT suffering from TLM saturation, but I have no way of knowing if frames were dropped earlier in the observation. From the chandra snapshot: UTC 1999:279:17:08:01 (Wed Oct 6) OBT 1999:279:17:07:24 CTUVCDU 3175679 FMT2_NORM OBC s/w NRML OBC Errs 0 OBT 55616844.96 ONLVCDU 3175672 OBSID 124 EPState SUN SIM TTpos 75623 HETG Angle 10.8 PCADMODE NPNT RA 83.898 Bus V 30.71 SIM FApos -467 LETG Angle 81.3 PCONTROL NPNT Dec -69.295 Bus I 67.16 AOFSTAR GUID Roll 71.884 ACA Object FFFSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTTTTTTT Dith Yang -2.29 Yaw Rate -0.11 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang 7.56 Pitch Rate 0.04 OBSMode NEXT ACA Int Time 1.698 Roll Rate -0.21 Door OP UNAC AOACSTAT OK FSS SunAlfa SUN Door CL UNAC FSS Alfa -0.87 Batt 1 SOC 100.00 Avg HRMA Temp 70.63 FSS Beta -1.71 Batt 2 SOC 100.00 Avg OBA Temp 50.50 SA Resolv 91.62 Batt 3 SOC 100.00 ACIS Stat7-0 64 OBA Tavg Fault NFLT SA Sun Pres ILLM Cold Rad -120.7 OBA Trng Fault NFLT Warm Rad -82.0 HRMA power 29.90 OBA power 135.90 EPHIN Geom LARG INT cnt 102 Roll Mom. 0.333 P41GM cnt 0 Pitch Mom. 3.524 A-Leak 0.1680 Yaw Mom. 14.168 B-Leak 0.0280