Dec_20_1999_M150.txt Shift M150 Start at 1999:354:18:00:00 GMT = 1999 Dec 20 1:00pm EST End 1999 Dec 20 6:00pm EST See http://asc.harvard.edu/acis/SOT_reports/sot-shift.html, or /proj/ascwww/AXAF/extra/science/htdocs/acis/SOT_reports/Dec_20_1999_M150.txt SOT Lead Ed Kellogg SOT SC/ACA Tom Aldcroft FOT-SI Eric Martin/Andy Northrup HRC-SI Jon Chappell/Gerry Austin/Mike Juda/Kathy Daigle ACIS-SI Yousaf Butt OTHER Plan: - Running load DEC1999 load. * Run ACIS CAP 528 to lower FP temp to -125 * Run CAP's 530, 531 and 532 to install, test and backout the continuous dither patch. * If time, run CAP 530, ACIS raw mode clocking test EVENTS DONE OBSID -------------- ---- ----- AOS DSS-27 (Goldstone) 354:1625 62249 Chandra status at AOS (see note 1) Execute CAP 528 to lower FP temp 354:1639 Start CAP 530 for dither testing 354:1640 ACIS FP temp dropping 354:1646 Complete step 1 CAP 530 354:1700 Execte CAP 531 (Step 8A008.3 SAP 8A008) 354:1721 to load dither patch Execute step 8A008.4 of SAP 8A008 354:1743 Start Shift 354:1800 to dither in Normal point mode 354:1801 Confirm dither 354:1803 SAP8A008.7b quaternion updated 354:1842 Large yaw maneuver ended, 8A008.8, got 5 stars 354:1953 Begin 8A008.9, acquire stars @ large dither amplitude 354:2000 Successful completion, .9 354:2019 Begin .10, acquire stars @ large dither rate 354:2020 TLM dump 354:2030 ACIS fp T -121.2 C 354:2057 Begin .11 maneuver to initial attitude, 354:2140 SCS 107 has run 354:2153 Complete step .13, recover from bright star hold 354:2220 CAP 535 to recover and re-enable SCS107 354:2238 Begin step .14 verif. NSM transition & SCS 191 op'n 354:2242 Complete step .15 reconfigure HRC 354:2315 Start CAP 532 to back out enhanced dither 354:2325 ACIS focal plane at -122.8 C, going down slowly 354:2333 CAP 529A to collect ACIS raw mode data 354:2357 Complete step .16 configure to intercept daily load 355:0015 Complete dither test 355:0015 End of shift 354:2300 Evaluation of QL data done at 354:19:00 -------------------------------------------- The following observations from the last ten days should be available for review. If there is no comment after the entry, it means the image has not yet appeared in the book. OBSID Target Time Comment ----- ------ -------------- ------- 01493 ArLac 1999:343:14:33 in book, looks good 01497 ArLac 1999:343:16:33 in book, looks good 01502 ArLac 1999:343:19:03 in book, looks good 01503 ArLac 1999:343:19:35 in book, looks good 01504 ArLac 1999:343:20:07 in book, looks good 01449 RX J0439.0+0715 1999:343:21:50 01449 RX J0439.0+0715 1999:343:21:50 00850 BAL 0256-0119 1999:343:22:47 in book, looks good 01408 CAS A, -Y MCP 1999:347:00:07 01508 LP 944-20 1999:349:13:20 00969 NGC 253 1999:350:12:29 in book, looks good 00765 TOO SUPERNOVA (A5) 1999:350:17:14 in book, looks good 00609 LAMBDA AND 1999:351:04:22 596 TOO GammaBurst 1999:352:04 in book, looks good 01505 CAS A 1999:353:04:02 01456 CYG X-3 1999:353:18:23 00870 NGC 404 1999:353:21:32 00494 A1795 1999:354:05:39 00389 NGC 2841 1999:354:11:45 00403 NGC 4494 1999:354:12:49 NOTES/ISSUES/PROBLEMS --------------------- The SCS 107 safing ran about the time of 8A008, step 11, in which we were to maneuver to the initial attitude in preparation for bright star hold, and go into bright star hold. The procedure 8A008 should have disabled SCS 107 before going into bright star hold, but did not do so. In order to recover, we must go back to normal point mode, and then re-enable SCSs 89 & 90 and 107. This recover was done without incident, and the remainder of the enhanced dither operations were done successfully, including reconfiguring for the daily load. The ACIS cooling was going very slowly toward the end of this shift. We had some trouble acquiring one of the stars in the catalog for the dithering test. Eric said it was about 20 arcsec off. It would usually be acquired on the second try. 2) Chandra's state at AOS 354:1844 was: UTC 1999:354:18:44:01 (Mon Dec 20) f_ACE 1.76e+01 F_ACE 2.43e+06 R km 117385D OBT 1999:354:18:43:35 CTUVCDU 11708786 OBC s/w NRML FMT4_NORM CPEstat NORM OBT 62102615.40 ONLVCDU 11708784 OBC Errs 1 OBSID 62249 EPState SUN SIM TTpos -99616 HETG Angle 81.0 PCADMODE NMAN RA 109.670 Bus V 30.55 SIM FApos -467 LETG Angle 79.1 PCONTROL NPNT Dec -64.955 Bus I 24.94 AOFSTAR GUID Roll 19.632 ACA Object SSSSSSSS Dither ENAB HRC-I HV OFF ACA ImFunc TTNTNNNN Dith Yang -12.99 Yaw Rate 48.27 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang -12.99 Pitch Rate -0.22 OBSMode NEXT ACA Int Time 0.705 Roll Rate -0.11 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.39 Batt 1 SOC 100.00% Avg HRMA Temp 70.61 FSS Beta -0.34 Batt 2 SOC 100.00% ACIS Stat7-0 67 Avg OBA Temp 50.89 SA Resolv 90.18 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 11.60 HRMA power 17.30 -Y SA Amps 12.76 EPHIN Geom LARG OBA power 73.30 +Y SA Temp 116.95 E1300 2 -Y SA Temp 116.95 P4GM 0 Roll Mom. -3.078 P41GM 0 Pitch Mom. -1.301 UpL Cmd Acc 28471 A-Leak 0.3280 Yaw Mom. 5.079 Cmd Rej A 198 B-Leak 0.0520 3) Chandra snapshot UTC 1999:354:23:35:01 (Mon Dec 20) f_ACE 1.60e+01 F_ACE 2.78e+06 R km 96265D OBT 1999:354:23:34:27 CTUVCDU 11776895 OBC s/w NRML FMT1_NORM CPEstat NORM OBT 62120067.74 ONLVCDU 11776888 OBC Errs 13 OBSID 62249 EPState SUN SIM TTpos -99616 HETG Angle 81.0 PCADMODE NMAN RA 108.071 Bus V 30.24 SIM FApos -467 LETG Angle 79.1 PCONTROL NPNT Dec -65.291 Bus I 33.04 AOFSTAR GUID Roll 17.664 ACA Object SSSSSSSS Dither DISA HRC-I HV ON ACA ImFunc TTNTTNNN Dith Yang 0.00 Yaw Rate -0.01 HRC-S HV OFF ACA CCD Temp -10.4 Dith Zang 0.00 Pitch Rate -0.02 OBSMode OBSV ACA Int Time 0.705 Roll Rate 0.03 Door OP UNAC AOACSTAT OK FSS SunBeta SUN Door CL UNAC FSS Alfa -0.07 Batt 1 SOC 100.00% Avg HRMA Temp 70.58 FSS Beta -0.27 Batt 2 SOC 100.00% ACIS Stat7-0 66 Avg OBA Temp 50.81 SA Resolv 90.11 Batt 3 SOC 100.00% Cold Rad -130.3 OBA Tavg Fault NFLT SA Sun Pres ILLM Warm Rad -82.0 OBA Trng Fault NFLT +Y SA Amps 15.85 HRMA power 55.00 -Y SA Amps 17.03 EPHIN Geom LARG OBA power 88.80 +Y SA Temp 116.58 E1300 2 -Y SA Temp 116.58 P4GM 0 Roll Mom. -3.251 P41GM 0 Pitch Mom. -2.199 UpL Cmd Acc 30031 A-Leak 0.3360 Yaw Mom. 5.067 Cmd Rej A 51 B-Leak 0.0520