@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ @ @ MTA Monitoring Report 9/08/00 - 9/14/00 @ @ @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Archive of all weekly reports http://asc.harvard.edu/mta/REPORTS/weekly.html Archive of Monthly reports http://asc.harvard.edu/mta/REPORTS/MONTHLY ************ Radiation ************* Radmon triggers SI safing at about 257:19:15 Science restarted at 258:21:00 Plus 2 hr pad on next rad zone entry at 259:16:55 Total time lost about 27.75 hrs. obsid 648 SS Cygni TOO delayed obsid 647 U Gem to be rescheduled Thu, 14 Sep 2000 21:05:03 -0400 A Radiation violation of P3 (130Kev) been observed by ACE (limit = fluence of 3.6e8 particles/cm2-ster-MeV within 2 hours ) No Action taken, HETG in. ************ CTI trend ************* Average of ACIS-I CCDs (MnKa) slope 2.441e-8 CTI/day Detrended slope 1.298e-8 CTI/day *********** ACIS Focal Temperature ******** For this period, there were 3 peaks. Day (DOY) Temp (C) Width (DAY) 252.3 -110.0 0.36 255.0 -107.6 0.40 257.6 -111.0 tail end of data missing (due to ACIS reboot?) (see notes below) ************** SIM Movement ************ 11 TSC moves this period average time/step 0.00137 s nominal Max Pulse Width Modulation for each move see http://asc.harvard.edu/mta_days/mta_sim/ ************** MTA Problem Tracking ***************** No new problems were reported in this period. Following msids were reopened, not unexpected: 2C05PALV 5V BUS MONITOR 2FCPUAST FORCED COARSE POSITION U AXIS 2FCPVAST FORCED COARSE POSITION V AXIS 2C15NALV 15V BUS MONITOR 2C24PALV 24V BUS MONITOR 2PRBSVL PRIMARY BUS VOLTAGE 2C15PALV 15V BUS MONITOR ESAMYI S/A -Y CURRENT Following msids are still coming: 2PRBSCR AOVAMPWR CIUB5V CIUB15V C28VMONB AIOBP5CV CUSOB28V AOPSAMUL ESAPYI EOESAC1C EOESAC2C EPOVSPR AWD3TQI EB2V EB1V AOFUNLST AWD1TQI AWD4TQI 5EHSE400 AWD6TQIEB3V ************* Telemetry *********** 9/08,10,13 1DAHBVO DETECTOR ASSY. HTR VOLTAGE B dips briefly to 5.2 (yellow low/high, red low/high limits: 6.0 14.0 5.0 15.0) 9/08,13 HKABIASLEAKI HK A bias leakage current two spikes above yellow limit 0.8. These are the nominal result of radiation passages. 9/10 Eclipse EOEB1DIC EOEB1CIC EOEB2CIC EOEB3CIC 9/11 HETG insertion 4MP5AV 4MP5BV 4MP28BV 4MP28AV *********** Photon Page ************ The ACA Problem is in the specified handling of guide star positional errors. This issue in not signifcant to the final product and so is being worked at low priority. OBSID DETECTOR GRATING TARGET ANALYSIS ACA ----------------------------------------------------------------------- 2307 ACIS-S HETG SS CYG (TOO) No grat. anal. PROBLEM 702 ACIS-S HETG X1543-62 No grat. anal. OK 006 ACIS-S HETG AR LAC-1 ECLIPS No grat. anal. PROBLEM 651 ACIS-S NONE R AQUARII OK PROBLEM 889 ACIS-I NONE A3667 OK OK 913 ACIS-I NONE CLJ01452.7-1357 OK OK 522 ACIS-I NONE A209 OK OK 524 ACIS-I NONE A383 OK OK 951 ACIS-S NONE 1H0253+193 OK OK 796 ACIS-I NONE SBS 0335-052 OK PROBLEM 431 ACIS-S NONE EINSTEIN CROSS OK OK 252 HRC-I NONE M31 - South 2 OK OK 264 HRC-I NONE M31 - South 1 OK OK 612 HRC-I NONE HR 1442 OK OK 276 HRC-I NONE M31 - CENTER OK OK 288 HRC-I NONE M31 - North 1 OK OK 300 HRC-I NONE M31 - North 2 OK No anal. 718 HRC-I NONE GRS 1758-258 OK OK In other news BEP RESET: from Paul P. Bob G. has alerted us to the watchdog reset of the BEP. Is there any diagnostic information we can get from the SW TLM? We will have to decide on how to re-start later today. Should we warm boot or cold boot, etc? >From Peter Ford ACIS rebooted because of a FEP I/O bus error. This was in turn caused by a command to power-down the FEPs which was issued by SCS 107. As luck would have it, this arrived while ACIS was in the middle of a bias computation for OBSID 648. Although SCS 107 had previously sent a pair of stopScience commands, these were ignored during the bias computation, so the BEP was still interrogating the FEPs when they were powered down, thereby causing the bus error. Since the cause of the reboot is fully understood, I recommend that we recoved by warm-booting, followed by restarting DEA housekeeping. In my opinion, a cold-boot and reload of patches is unnecessary.