MTA Monitoring Report 06/29/01 - 07/05/01

Archive of Monthly reports

Radiation

There were no radiation alerts during this period.

CTI Trend

Average of ACIS-I CCDs (MnKa) slope 1.624e-8 CTI/day
Detrended slope 1.354e-8 CTI/day

ACIS Warm Pixels

	CCD2	CCD3	CCD4	CCD5	CCD6	CCD7	CCD8
New this week			(247, 364 -- reappear)	(509,34) (509, 40) (509,42) (509,166)(509,183) (509,224) (509,439) (509,746)		(4,360) (4,366) (4,457) (4,750)
Previously reported - still observed	(526,66)	(74,621)		(1,3,775-1024) (226,565) (232-245, 313) (509, spurious rows) (509,1-31) (510-513,775-1024) (516, spurious rows) (607,281) (1022,166)	(360,249) (766,501)	(1-3,1-1024) (510-515,775-1024) (1022,775-1024)	(62,482) (587,544)
*Previously reported - not observed during this period

ACIS Focal Temperature

For this period, 2 peaks were observed.

Day (DOY)	Temp (C)	Width (Days)
179.83	-115.67	0.21
185.07	-111.14	0.41

MTA Problem Tracking

CTUB15V (+15V CTU B) was reopened on 7/5.

Note: Problem Tracking system is currently not working properly. Many problems reported are not listed on the table. The system was reinitialized on 7/5.

SIM Movements

7 TSC moves this period
weekly average time/step 0.00134 s
mission average time/step 0.00139 s


Telemetry

There were several warnings on 7/5.

Sim Thermal:


• FAMTRTEMP (FA Motor Temperature): yellow warning. Max: 284.2 (yellow limit: 282)
  
• 3RCTUBPT (RCTU BASEPLATE (+X) Abort HTR TSC2 Temperature): yellow warning. Max: 277.56 (yellow limit: 276.5)
  
• BOXTEMP (SEA Box Temperature ): yellow warning. Max: 277.56 (yellow limit: 292)
  

  Spacecraft Temperature
  

• TSCIUSF1 (SC-IUS Fitting-1 Temperature): red warning. Max: 351.27 (red limit: 350)
  
• TSCIUSF8 (SC-IUS Fitting-8 Temperature): red warning. Max: 351.27 (red limit: 350)
  

  All violations occurred toward the end of the day.

  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
  2054	ACIS-S	NONE	M31_3	OK	PROBLEM
  1867	ACIS-I	NONE	CHAINORTHCLOUD	OK	OK
  2048	ACIS-S	NONE	M31_1	OK	OK
  1917	ACIS-S	NONE	SAXJ1818.7+1424	OK	OK
  1584	ACIS-I	NONE	M31NUCLEUS	OK	OK
  1923	ACIS-S	HETG	4U1705-44	OK /OK	OK
  1986	ACIS-S	NONE	GEVJ1837-0610	OK	OK
  2089	ACIS-S	HETG	NGC4593	OK /OK	OK
  974	ACIS-S	HETG	BETACETI	OK /NO ANAL	PROBLEM
  1962	HRC-I	NONE	1E1048-59	OK	OK

  Trending

  This Week's focus PCAD
  Temperatures in degrees K.
  Current in Amps.
  Voltage in Volts.
  

  Most msids are keeping the same trends from the previous reporting period ( 04/13/01 - 04/19/01 weekly).
  Interesting trends are indicated with "*".
  

  • ACA Thermal

    MSID	DESCRIPTION	COMMENTS
    AACCCDRT	AC CCD TEMP	flat around 289.1 after DOM 400
    AAOTALT	LENS CELL TEMP	flat around 287.4 after DOM 450
    AAOTASMT	secondary mirror	flat around 287.1 after DOM 450
    AAOTH2MT	AC OPT TEL ASSY SECONDARY MIRROR TEMP	flat around 287.4 after DOM 450
    AACH2T	AC HOUSING TEMP	flat around 287.75 after DOM 430
    AACBPPT	AC BASEPLATE TEMP	mainly around 293.1, but upward scatter after DOM 450
    AACBPRT	AC BASEPLATE TEMP	mainly around 289.7, but upward scatter after DOM 450
    AACCCDPT	AC CCD TEMP	flat @262.78
    *AACH1T	AC HOUSING TEMP	between 287.5 287.75 after DOM 510
    *AAOTAPMT	AC OPT TEL ASSY PRIMARY MIRROR TEMP	between 286.8 and 287.1 after DOM 510
    TEMPCCD	temp 1 - CCD	flat at 263.15
    *TEMPHOUS	temp 2 - AC housing	flat around 287.6 scatter to 287.95 after DOM 550
    TEMPORIM	temp 3 - lens cell	around 287.55 after DOM 400
    TEMOSEC	temp 4 - secondary mirror	around 287.15 after DOM 430

    
    
  • IRU Temperature and Electronics *AIRU1G2I

    MSID	DESCRIPTION	COMMENTS
    IRU-1 GYRO #2 CURRENT	downward trend currently around 99,flat after DOM 600
    AFSSPC1V	FSS POWER CONV 1 VOLTAGE	flat @ 3.50
    AFSSPC2V	FSS POWER CONV 2 VOLTAGE	flat @ 0.0
    AGWS1V	GYRO WHEEL SUPPLY 1 INPUT VOLTAGE	almost flat around 2.71
    AGWS2V	GYRO WHEEL SUPPLY 2 INPUT VOLTAGE	flat @0.0
    *AIRU1BT	IRU-1 BASE TEMP	flat @313, a new bump started around DOM 600
    *AIRU1G1I	IRU-1 GYRO #1 CURRENT	upward trend since DOM 500, currently about 93
    AIRU1G1T	IRU-1 GYRO #1 TEMP	flat @ 342.26
    AIRU1G2T	IRU-1 GYRO #2 TEMP	flat @ 342.72
    AIRU1VFT	IRU-1 VFC TEMP	flat @ 334.16
    AIRU2BT	IRU-2 BASE TEMP	flat @ 252.59
    AIRU2G1I	IRU-2 GYRO #1 CURRENT	flat @ 9.60
    AIRU2G1T	IRU-2 GYRO #1 TEMP	flat @ 292.59
    AIRU2G2I	IRU-2 GYRO #2 CURRENT	flat @ 9.60
    AIRU2G2T	IRU-2 GYRO #2 TEMP	flat @ 292.59
    AIRU2VFT	IRU-2 VFC TEMP	flat @ 292.58

    
    
  • PCAD Gyro Rates

    MSID	DESCRIPTION	COMMENTS
    AOSUNEC1	UNIT VEC. FROM THE SPACECRAFT	annual cycle between -1.0 and 1.0, second peak of mission around DOM 605
    AOSUNEC2	UNIT VEC. FROM THE SPACECRAFT	annual cycle between -1.0 and 1.0, approaching second peak of mission
    AOSUNEC3	UNIT VEC. FROM THE SPACECRAFT	annual cycle between -0.4 and 0.4, approaching second peak of mission
    AOTAROT1	TARGET ATTITUDE	annual cycle between -0.6 and 0.6, approaching max
    AOTAROT2	TARGET ATTITUDE	annual cycle between -1.0 and 1.0, approaching min
    AOTAROT3	TARGET ATTITUDE	scattered between -0.8 and 0.6, slightly upward trend.
    AOATTQT1	ESTIMATED S/C ATTITUDE	annual cycle between -0.6 and 0.8, approaching max, tracking commanded att.
    AOATTQT2	ESTIMATED S/C ATTITUDE	annual cycle between -0.8 and 0.8, approaching min, tracking commanded att.
    AOATTQT3	ESTIMATED S/C ATTITUDE	scattered between -0.6 and 0.6, tracking commanded att.
    AOATTQT4	ESTIMATED S/C ATTITUDE	scattered between 0.0 and 1.0
    AOCMDQT1	COMMANDED S/C ATTITUDE	annual cycle between -0.6 and 0.8, approaching max
    AOCMDQT2	COMMANDED S/C ATTITUDE	annual cycle between -0.8 and 0.8, approaching min
    AOCMDQT3	COMMANDED S/C ATTITUDE	scattered between -0.6 and 0.6
    AOSCPOS1	SPACECRAFT POSITION VECTOR X	around 5 in log scale
    AOSCPOS2	SPACECRAFT POSITION VECTOR Y	scattered between -1.2e5 to -2.0e4
    AOSCPOS3	SPACECRAFT POSITION VECTOR Z	around 5 in log scale
    AOSCVEL1	SPACECRAFT POSITION VEL	scattered between -1.5 and 1.0 more around 0.9
    AOSCVEL2	SPACECRAFT POSITION VEL	scattered between -1.5 and 1.5
    AOSCVEL3	SPACECRAFT POSITION VEL	scattered between -1.0 and 1.0
    AI1AX1X	IRU-1 AXIS 1X ANALOG RATE	flat @ 0.0
    AI1AX1Y	IRU-1 AXIS 1Y ANALOG RATE	flat @ 0.0
    AI1AX2X	IRU-1 AXIS 2X ANALOG RATE	flat @ 0.0
    AI1AX2Y	IRU-1 AXIS 2Y ANALOG RATE	flat @ 0.0
    AI2AX1X	IRU-2 AXIS 1X ANALOG RATE	flat @ -3.72, some scattered to downward
    AI2AX1Y	IRU-2 AXIS 1Y ANALOG RATE	flat @ -3.72, some scattered to downward
    AI2AX2X	IRU-2 AXIS 2X ANALOG RATE	flat @ -3.72, some scattered to downward
    AI2AX2Y	IRU-2 AXIS 2Y ANALOG RATE	flat @ -3.72, some scattered to downward

    
    
  • FTS Temp and Gradient

    MSID	DESCRIPTION	COMMENTS
    OHRTHR43	RT 134: PERISCOPE	slight upward trend 293.0 to 293.1
    OOBAGRD3	RT 505 TO RT 504: PERISCOPE GRADIENT	slight downward trend 1.0 to 0.95
    OHRTHR27	RT 20 : PERISCOPE	tightly scattered around 297.10
    OHRTHR42	RT 133: PERISCOPE	tightly scattered around 294.10
    OOBAGRD6	RT 507 TO RT 506: PERISCOPE GRADIENT	flat @0.03

    
    
  • PCAD Reaction Wheel Rates

    MSID	DESCRIPTION	COMMENTS
    AORWCMD1	REACTION WHEEL TORQUE COMMANDS 1	flat @ 0.0
    AORWCMD2	REACTION WHEEL TORQUE COMMANDS 2	flat @ -0.01
    AORWCMD3	REACTION WHEEL TORQUE COMMANDS 3	flat @ 0.0
    AORWCMD4	REACTION WHEEL TORQUE COMMANDS 4	flat @ -0.01
    AORWCMD5	REACTION WHEEL TORQUE COMMANDS 5	flat @ 0.0
    AORWCMD6	REACTION WHEEL TORQUE COMMANDS 6	flat @-0.01
    AORWCNT1	TACH PULSE COUNT 1	scattered between -60 and 60
    AORWCNT2	TACH PULSE COUNT 2	scattered between -40 and 40
    AORWCNT3	TACH PULSE COUNT 3	scattered between -60 and 60
    AORWCNT4	TACH PULSE COUNT 4	scattered between -60 and 60
    AORWCNT5	TACH PULSE COUNT 5	scattered between -40 and 60
    AORWCNT6	TACH PULSE COUNT 6	scattered between -60 and 60
    AORWMC1	COMMANDED REACTION WHEEL ANGULAR MOMENTUM	scattered between 16 and 28
    AORWMC4	COMMANDED REACTION WHEEL ANGULAR MOMENTUM	scattered between -28 and -16
    AORWMC5	COMMANDED REACTION WHEEL ANGULAR MOMENTUM	scattered between 16 and 26
    AORWMC6	COMMANDED REACTION WHEEL ANGULAR MOMENTUM	scattered between 140 and 260
    AORWSPD2	REACTION WHEEL RATES	scattered between -240 and -120, slight downward trend
    AORWSPD3	REACTION WHEEL RATES	scattered between 140 and 280, slight downward trend
    AORWSPD4	REACTION WHEEL RATES	scattered between -260 and -140
    AORWSPD5	REACTION WHEEL RATES	scattered between 140 and 240, slight upward trend
    AORWSPD6	REACTION WHEEL RATES	scattered between -260 and -160

    
    
  • Drift rate updated to Gyros

    MSID	DESCRIPTION	COMMENTS
    AOGBIAS1	GYRO DRIFT RATE ESTIMATED (ROLL)	flat @0.0
    AOGBIAS2	GYRO DRIFT RATE ESTIMATED (PITCH)	flat @0.0
    AOGBIAS3	GYRO DRIFT RATE ESTIMATED (ROLL)	flat @0.0
    AOGYRCT1	ACCUM. GYRO PULSE COUNTS	scattered between -1500 and 1000
    AOGYRCT2	ACCUM. GYRO PULSE COUNTS	scattered between -200 and 200
    AOGYRCT3	ACCUM. GYRO PULSE COUNTS	scattered between -300 and 300
    AOGYRCT4	ACCUM. GYRO PULSE COUNTS	scattered between -400 and 400