MTA Monitoring Report 4/06/01 - 04/12/01

Archive of all weekly reports

Archive of Monthly reports

Radiation

2 ACE alerts were issued during this period

See lost science log for more details

CTI Trend

Average of ACIS-I CCDs (MnKa) slope 1.787e-8 CTI/day
Detrended slope 1.320e-8 CTI/day

ACIS Focal Temperature

For this period, 2 peaks are observed.
       Day (DOY)       Temp (C)        Width (DAY)
       -------------------------------------------
	97.77		-112.92		0.32
	100.37		-115.51		0.44	-small shoulder on rising side

MTA Problem Tracking

No new or reopened problems were reported in this period

Following msids are still coming
AOMOMMON

SIM Movements

9 TSC moves this period
weekly average time/step 0.00171 s
mission average time/step 0.00139 s

Telemetry

ON 4/6, a few SIM Thermal and Spacecraft Temperature msids triggered warnings:

  • BOXTEMP (SEA Box Temperature) hit an yellow warning with the max of 292.65 (upper yellow limit: 292)
  • FAMTRTEMP (FA Motor Temperature) hit an red warning with the max of 285.15 (upper red limit: 285)
  • TSCIUSF1 (SC-IUS FITTING-1 TEMP) hit a yellow warning with the max of 349.70 (upper yellow limit: 347.0)
  • TSCIUSF8 (SC-IUS FITTING-8 TEMP) hit a yellow warning with the max of 349.70 (upper red limit: 347.0)

    On 4/8 and 9, a Computed Acis Electronics msid triggered warnings:

  • 1DPPWRB (Computed DP Power Side B) hit an red warning with the min of 7.56 (lower red limit: 8.0)
    On 4/12,
  • 1DPPWRB hit red warnings again (min: 7.79).


    Recent Observations

    The ACA Problem is in the specified handling of guide star positional errors. This issue in not significant to the final product and so is being worked at low priority.
    OBSID DETECTOR GRATING TARGET ANALYSIS ACA
    2431 ACIS-S HETG NGC3516 OK /OK PROBLEM
    2135 ACIS-S NONE 0836+299 OK PROBLEM
    2297 ACIS-S LETG 4U0241+61 OK /OK PROBLEM
    2000 ACIS-S NONE CRABNEBULA OK OK
    1013 HRC-S LETG PKS2155-304 OK /OK OK

    Trending

    This Week's focus SIM
    Temperatures in degrees K.
    Current in Amps.
    Voltage in Volts.
    Interesting trends are indicated with "*".
    Other msids are keeping the same trends from the previous reporting period ( 01/19/01 - 01/26/01 weekly).