MTA Monitoring Report 9/15/00 - 9/21/00
Archive of all weekly reports
Archive of Monthly reports
************ Radiation *************
Event Sunday 9/16 cleared two hour threshold. Breif event, no action taken.
Air Force Kp violations Sunday 9/17 (7.33) and Tuesday 9/19
(6.0). Total of 9 hours of violation time. No action taken.
Costello Kp Violation 9/16 (6.66) and 9/17 (7.33) 15 hours Kp > 5.5.
No action taken.
************ CTI trend *************
Average of ACIS-I CCDs (MnKa) slope: 2.481e-8 (CTI/day)
Detrended slope 1.374e-8 (CTI/day)
*********** ACIS Focal Temperature ********
For this period, there were 2 peaks.
Day (DOY) Temp (C) Width (DAY)
260.3 -111.5 0.48
262.9 -111.3 0.37
************** MTA Problem Tracking *****************
No new or reopened problem was reported in this period. Following
msids are still coming (All eclipse related except AWD3TQI)
EB2CI, EB1CI, EB3CI, AOVAMPWR, ESAPYI, AWD3TQI, AOFUNLST
************** SIM Movement ************
7 TSC moves this period
average time/step 0.00139 s
nominal Max Pulse Width Modulation for each move
see
SIM monitoring
************* Telemetry ***********
Violation related to OTG moves and eclipse operations.
9/15, battery msids (EB1DIC, EOEB1CIC, EOEB2CIC, EOEB3CIC) showed
a large oscillation into red violations.
9/18, many of oba msids (esp. OBA cone/OBA fwd bulkhead) registered
a sharp peak (and a red or yellow violation).
Spacecraft electronics, OOBAPWR (OBA COMPUTED TOTAL POWER) also showed
a huge spike to 800 level (red upper limits: 300.0, usually around
0-200)
ELBI (LOAD BUS CURRENT) showed a similar spike.
9/20, Grating voltages 4MP5AV,4MP5BV,4MP28AV, and 4MP28BV displayed
a large spike. Nominally, they are all zeros (current settings), but
jumped to the other setting limits (5V, 5V, 28V, 28V, respectively).
************ Trending *************
Spacecraft Electronics A, CUSOA28V (+28V USO A) jumped from steady
23.85 to steady 24.5 for the last month or so. We need to see if this
continnues now that eclipses are done.
*********** Recent Observations ************
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.
MSID DETECTOR GRATING TARGET ANALYSIS ACA
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10 ACIS-S HETG AR LAC-5 FIRST QUAD ok OK
774 ACIS-S HETG 0509-67.5 ok OK
11 ACIS-S HETG AR LAC-6 LAST QUAD ok OK
2305 ACIS-S HETG TAU SCO ok PROBLEM
638 ACIS-S HETG TAU SCO ok OK
648 ACIS-S HETG SS CYG ok PROBLEM
9 ACIS-S HETG AR LAC-4 ECLIPSE ok OK
104 ACIS-S HETG 4U 1626-67 ok OK
7 AICS-S HETG AR LAC-2 FIRST QUAD ok OK
8 ACIS-S HETG AR LAC-3 LAST QUAD ok PROBLEM