MTA Monitoring Report 11/30/01 - 12/06/01

Archive of Monthly reports

Radiation

There were no radiation violation this week. However, due to an apparent anomaly in the OBC'S EPHIN hardware failure flag, our onboard radiation protection software inadvertently tripped at about 336:02:15 GMT (9:15 pm on Saturday night) as we emerged from perigee. EPHIN appears to be working normally and properly, and the EIO unit is properly incrementing counters and putting data into telemetry. Observations restarted 338:16:55:40.875 (Tuesday, 11:55 a.m.EST).

CTI Trend

Average of ACIS-I CCDs (MnKa) slope 1.308e-8 CTI/day
Detrended slope 1.238e-8 CTI/day

ACIS Warm Pixels

	CCD0	CCD2	CCD3	CCD5	CCD6	CCD7	CCD8
New this week/ Reappeared	(995,200)				(360,249)
Previously reported - still observed		(483,816)	(811,637)	(1-3,775-1024) (226,565) (232-245, 313) (509, spurious rows) (510-511,775-1024) (512,775) (513,776-1024) (607,281) (1022,166)	(766,501)	(1-3,1-114) (1-3,775-1024) (509, spurious rows) (510-511,775-1024) (512,775) (513-515,775-1024) (516,spurious rows) (1022,775)	(62,482) (587,544)
Previously reported - not observed during this period

ACIS Focal Temperature

SIM Movements

Telemetry

HKBBIASLEAKI (HK B bias leakage current): yellow warning. Max: 0.56 (upper yellow limit: 0.5)
TEPHIN (EPHIN SENSOR HOUSING TEMP): yellow warning. Max: 300.55 (upper yellow limit: 300.2)
FAMTRTEMP (FA Motor Temperature): yellow warning. Max: ~283.2 (upper yellow limit: 282)
CPCA15V (+15V RCTU_PC A): yellow warning. Max: 15.51 (upper yellow limit: 15.50)
LETG RETR
HETG INSR

1DPPWRB (DP Power Side B): red warning. Min: 7.42 (lower red limit: 9.0)
HKBBIASLEAKI (HK B bias leakage current): yellow warning. Max: 0.68 (upper yellow limit: 0.5)
TEPHIN (EPHIN SENSOR HOUSING TEMP): yellow warning. Max: 302.09 (upper yellow limit: 300.2)
5EPHINT (EPHIN TEMP): yellow warning. Max: 301.53 (upper yellow limit: 300)
FAMTRTEMP (FA Motor Temperature): yellow warning. Max: ~283.2 (upper yellow limit: 282)
HETG RETR
LETG INSR

1DPPWRB (DP Power Side B): red warning. Min: ~7.4 (lower red limit: 9.0)
HKBBIASLEAKI (HK B bias leakage current): yellow warning. Max: 0.59 (upper yellow limit: 0.5)
TEPHIN (EPHIN SENSOR HOUSING TEMP): yellow warning. Max: 300.55 (upper yellow limit: 300.2)
5EPHINT (EPHIN TEMP): yellow warning. Max: 300.25 (upper yellow limit: 300)
FAMTRTEMP (FA Motor Temperature): yellow warning. Max: 283.65 (upper yellow limit: 282)
TSCIUSF1 (SC-IUS FITTING-1): red warning. Max: 355.98 (upper red limit: 349.7)
TSCIUSF8 (SC-IUS FITTING-8): red warning. Max: 355.98 (upper red limit: 349.7)

1DPPWRB (DP Power Side B): red warning. Min: 7.68 (lower red limit: 9.0)
FAMTRTEMP (FA Motor Temperature): yellow warning. Max: 283.65 (upper yellow limit: 282)
TSCIUSF1 (SC-IUS FITTING-1): red warning. Max: 355.98 (upper red limit: 349.7)
TSCIUSF8 (SC-IUS FITTING-8): red warning. Max: 355.98 (upper red limit: 349.7)

1DPPWRB (DP Power Side B): red warning. Min: 7.68 (lower red limit: 9.0)
HKBBIASLEAKI (HK B bias leakage current): yellow warning. Max: 0.64 (upper yellow limit: 0.5)
TEPHIN (EPHIN SENSOR HOUSING TEMP): yellow warning. Max: 301.58 (upper yellow limit: 300.2)
5EPHINT (EPHIN TEMP): yellow warning. Max: 301.10 (upper yellow limit: 300)
FAMTRTEMP (FA Motor Temperature): yellow warning. Max: 283.65 (upper yellow limit: 282)
TSCIUSF1 (SC-IUS FITTING-1): red warning. Max: 355.98 (upper red limit: 349.7)
TSCIUSF8 (SC-IUS FITTING-8): red warning. Max: 355.98 (upper red limit: 349.7)
TPZLGABM (+Z LOW-GAIN ANTENNA BOOM TEMP): yellow warning. Min: 207.85 (limit yellow limit: 208)
LETG INSR

HKBBIASLEAKI (HK B bias leakage current): yellow warning. Max: 0.58 (upper yellow limit: 0.5)
TEPHIN (EPHIN SENSOR HOUSING TEMP): yellow warning. Max: 301.58 (upper yellow limit: 300.2)
5EPHINT (EPHIN TEMP): yellow warning. Max: 301.10 (upper yellow limit: 300)

HKBBIASLEAKI (HK B bias leakage current): yellow warning. Max: 0.61 (upper yellow limit: 0.5)
TEPHIN (EPHIN SENSOR HOUSING TEMP): yellow warning. Max: 301.06 (upper yellow limit: 300.2)
5EPHINT (EPHIN TEMP): yellow warning. Max: 300.67 (upper yellow limit: 300)

Recent Observations

Trending

No significant changes since last reported on Sep 20.
The most 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 TEMP	flat around 287.1 after DOM 450
  AAOTH2MT	AC OPT TEL ASSY SECONDARY MIRROR TEMP (HRMA)	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, scattering upward
  AACBPRT	AC BASEPLATE TEMP	mainly around 289.7, scattering upward
  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	scattered 287.6 to 287.95 after DOM 550
  TEMPPRIM	temp 3 - lens cell	around 287.55 after DOM 400
  TEMPSEC	temp 4 - secondary mirror	around 287.15 after DOM 430

  
  
• IRU Temperature and Electronics

  MSID	DESCRIPTION	COMMENTS
  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	flat @ 2.71
  AGWS2V	GYRO WHEEL SUPPLY 2 INPUT VOLTAGE	flat @ 0.0
  *AIRU1BT	IRU-1 BASE TEMP	flat @313, bump up to 313.4 started around DOM 600, back to 313 around DOM 800
  *AIRU1G1I	IRU-1 GYRO #1 CURRENT	upward trend since DOM 500, jumped to 100 around DOM< 770
  AIRU1G1T	IRU-1 GYRO #1 TEMP	flat @ 342.26
  *AIRU1G2I	IRU-1 GYRO #2 CURRENT	downward trend currently around 99,flat after DOM 600
  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 @ 291.48

  
  
• PCAD Gyro Rates

  MSID	DESCRIPTION	COMMENTS
  AOALPANG	UNIT FSS ALPHA ANGLE MEAS	around 0 scattering downward to -40
  AOBETANG	FSS BETA ANGLE MEAS	between -60 and 40,
  AOSUNEC1	UNIT VEC. FROM THE SPACECRAFT	annual cycle between -1.0 and 1.0, currently at third min of mission
  AOSUNEC2	UNIT VEC. FROM THE SPACECRAFT	annual cycle between -1.0 and 1.0, second max of mission around DOM 700
  AOSUNEC3	UNIT VEC. FROM THE SPACECRAFT	annual cycle between -0.4 and 0.4, second max of mission around DOM 700
  AOSUNEC3	UNIT VEC. FROM THE SPACECRAFT	annual cycle between -0.4 and 0.4, second max of mission around DOM 700
  AOSUNSA1	CSSA DERIVED UNIT VECTOR TO THE SUN IN SA FRAM	around 0.0
  AOSUNSA2	CSSA DERIVED UNIT VECTOR TO THE SUN IN SA FRAM	around 0.0
  AOSUNSA3	CSSA DERIVED UNIT VECTOR TO THE SUN IN SA FRAM	around 0.0
  AOTARQT1	TARGET ATTITUDE	annual cycle between -1.0 and 1.0
  AOTARQT2	TARGET ATTITUDE	annual cycle between -1.0 and 1.0
  AOTARQT3	TARGET ATTITUDE	scattered between -1.0 and 1.0, slightly upward trend.
  AOATTQT1	ESTIMATED S/C ATTITUDE	annual cycle between -1.0 and 1.0, tracking commanded att.
  AOATTQT2	ESTIMATED S/C ATTITUDE	annual cycle between -1.0 and 1.0, tracking commanded att.
  AOATTQT3	ESTIMATED S/C ATTITUDE	scattered between -1.0 and 1.0, tracking commanded att.
  AOATTQT4	ESTIMATED S/C ATTITUDE	scattered between 0.0 and 1.0
  AOCMDQT1	COMMANDED S/C ATTITUDE	annual cycle between -1.0 and 1.0
  AOCMDQT2	COMMANDED S/C ATTITUDE	annual cycle between -1.0 and 1.0
  AOCMDQT3	COMMANDED S/C ATTITUDE	scattered between -1.0 and 1.0
  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 VELOCITY VECTOR X	scattered between -1.5 and 1.0 more around 0.9, upper and lower limits increasing
  *AOSCVEL2	SPACECRAFT VELOCITY VECTOR Y	scattered between -2.0 and 1.5, upper and lower limits increasing
  *AOSCVEL3	SPACECRAFT VELOCITY VECTOR Z	scattered between -1.0 and 1.0, upper and lower limits increasing
  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 downward
  AI2AX1Y	IRU-2 AXIS 1Y ANALOG RATE	flat @ -3.72, some scattered downward
  AI2AX2X	IRU-2 AXIS 2X ANALOG RATE	flat @ -3.72, some scattered downward
  AI2AX2Y	IRU-2 AXIS 2Y ANALOG RATE	flat @ -3.72, some scattered downward

  
  
• FTS Temp and Gradient

  MSID	DESCRIPTION	COMMENTS
  OHRTHR43	RT 134: PERISCOPE	slight upward trend 293.0 to 293.1
  OHRTHR27	RT 20 : PERISCOPE	tightly scattered around 297.10
  OHRTHR42	RT 133: PERISCOPE	tightly scattered around 294.10
  OHRTHR43	RT 134: PERISCOPE	tightly scattered around 293.10, slightly upward
  OOBAGRD3	RT 505 TO RT 504: PERISCOPE GRADIENT	slight downward trend 1.0 to 0.95
  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 -100 and 150
  AORWCNT2	TACH PULSE COUNT 2	scattered between -100 and 150
  AORWCNT3	TACH PULSE COUNT 3	scattered between -100 and 150
  AORWCNT4	TACH PULSE COUNT 4	scattered between -100 and 150
  AORWCNT5	TACH PULSE COUNT 5	scattered between -100 and 150
  AORWCNT6	TACH PULSE COUNT 6	scattered between -150 and 100
  AORWMC1	COMMANDED REACTION WHEEL ANGULAR MOMENTUM	scattered between 12 and 35
  AORWMC4	COMMANDED REACTION WHEEL ANGULAR MOMENTUM	scattered between -35 and -15
  AORWMC5	COMMANDED REACTION WHEEL ANGULAR MOMENTUM	scattered between 15 and 30
  AORWMC6	COMMANDED REACTION WHEEL ANGULAR MOMENTUM	scattered between 140 and 260
  AORWSPD1	REACTION WHEEL RATES	scattered between 100 and 300
  AORWSPD2	REACTION WHEEL RATES	scattered between -300 and -140
  AORWSPD3	REACTION WHEEL RATES	scattered between 100 and 300
  AORWSPD4	REACTION WHEEL RATES	scattered between -300 and -140
  AORWSPD5	REACTION WHEEL RATES	scattered between 140 and 300
  AORWSPD6	REACTION WHEEL RATES	scattered between -300 and -100

  
  
• 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 (YOWL)	flat @0.0
  AOGYRCT1	ACCUM. GYRO PULSE COUNTS	scattered between -1500 and 1000
  AOGYRCT2	ACCUM. GYRO PULSE COUNTS	scattered between -300 and 200
  AOGYRCT3	ACCUM. GYRO PULSE COUNTS	scattered between -400 and 400
  AOGYRCT4	ACCUM. GYRO PULSE COUNTS	scattered between -400 and 400

  
  NEW!     See Average gyro bias and nominal deviations trending.