MTA Monitoring Report 11/03/00 - 11/10/00

Archive of Monthly reports

Radiation

An alert was issued on 11/04/00
11/04/00, 10:15:01 EST: ACIS fluence = 1.00e+09 p/(cm^2-sr-MeV)
Threshold = 1.00e+09 p/(cm^2-sr-MeV)
No action taken

11/06/00, about 21:00 EST: predicted Kp 7.0
observed Kp reaches 6.0
Entering SI safing for rad zone passage soon, so no action taken

11/08/00, 18:26 EST: RADMON safing SCS 107
tripped by EPHIN P4GM channel, threshold= 300 counts/cm^2/s/sr
affected OBSIDS: 2077 1029 1987 1925 1578 1030 2246
plan to restart science operations after next perigee passage
at 315:2359 OBSID 2191, dependent on favorable rad environment
ACE, Ephin, GOES rates remain extremely high

CTI trend

ACIS Focal Temperature

       Day (DOY)       Temp (C)        Width (DAY)
       307.9           -117.8          0.28
       310.6           -118.1          0.44
       313.2           -117.7          0.27

MTA Problem Tracking

AOVAMPWR AOFUNLST ESAPYI AWD2TQI AWD3TQI AWD5TQI AWD6TQI

SIM Movement

Telemetry

Many calculated, GRAD MSIDS are consistently in yellow/red including:

HRMA Struts - HSTRTGRD
OBA AFT Bulkhead - HAFTBGRD
OBA Cone - HCONEGRD
OBA FWD Bulkhead - HFRDBGRD
Spacecraft Struts - HSSTRTGRD
TFTE - HTFTEGRD

Trending

• ACA Temp

  MSID	DESCRIPTION	COMMENTS
  AACBPPT	AC BASEPLATE TEMP (PRIME)	- flat within 292.7 to 293.2 K
  AACBPRT	AC BASEPLATE TEMP (RDNT)	- flat within 289.3 to 289.7 K
  AACCCDPT	AC CCD TEMP (PRI)	- flat 262.78 K
  AACCCDRT	AC CCD TEMP (RDNT)	- varies 288.4 to 289.1 increasing trend since DOM 400?
  AACH1T	AC HOUSING TEMP (ACH1)	- mostly flat, some scatter 287.0 to 287.6 K
  AACH2T	AC HOUSING TEMP (ACH2)	- mostly flat, some scatter 287.0 to 287.6 K
  AAOTALT	AC OPT TEL ASSY LENS TEMP	- flat within 286.8 to 287.4, more toward upper end since DOM 400
  AAOTAPMT	AC OPT TEL ASSY PRIMARY MIRROR TEMP	- flat within 286.2 to 286.9
  AAOTASMT	AC OPT TEL ASSY SECONDARY MIRROR TEMP	- flat within 286.4 to 287.1, more toward upper end since DOM 400
  AAOTH2MT	AC OPT TEL ASSY SECONDARY MIRROR TEMP (HRMA)	-flat within 286.8 287.4, slightly higher since DOM 400
  TEMPCCD	TEMPCCD	- flat 263.15 K
  TEMPHOUS	TEMPHOUS	- flat within 287.2 to 287.8
  TEMPPRIM	TEMPPRIM	- flat within 286.8 to 287.6, more toward upper end since DOM 400
  TEMPSEC	TEMPSEC	- flat within 286.4 to 287.2, more toward upper end since DOM 400

  
  
• IRU Temperatures and Electronics

  MSID	DESCRIPTION	COMMENTS
  AFSSPC1V	POWER CONV 1 VOLTAGE	- flat 3.50 V
  AFSSPC2V	POWER CONV 2 VOLTAGE	- flat 0.0 V
  AGWS1V	GYRO WHEEL SUPPLY 1 INPUT VOLTAGE	- flat 2.70 V, occasionally 2.71 V
  AGWS2V	GYRO WHEEL SUPPLY 2 INPUT VOLTAGE	- flat 0.0 V, slightly higher (0.01 to 0.05 V) DOM 190 - 270/tr>
  AIRU1BT	IRU-1 BASE TEMP	- nominally 313 K, bulge to 313.38 K from DOM 240 to 415
  AIRU1G1I	IRU-1 GYRO #1 CURRENT	- stepish, DOM 0-65 ~88.8 mamps, DOM 70-110 ~91.2, DOM 120-210 ~93.8, DOM 225-385 ~88.8, DOM 395-452 ~91.2, DOM 452-current ~88.8
  AIRU1G1T	IRU-1 GYRO #1 TEMP
  AIRU1G2I	IRU-1 GYRO #2 CURRENT	- stepish, DOM 30-110 increases 102 to 105, DOM 160-210 increases 102 to 103.4, DOM 210-285 ~100, DOM 290-362 ~101.2, DOM 410-present ~99.4
  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 mamps
  AIRU2G1T	IRU-2 GYRO #1 TEMP	- flat 292.59
  AIRU2G2I	IRU-2 GYRO #2 CURRENT
  AIRU2G2T	IRU-2 GYRO #2 TEMP	- flat 292.59
  AIRU2VFT	IRU-2 VFC TEMP

  
  
• PCAD Gyro Rates

  MSID	DESCRIPTION	COMMENTS
  AI1AX1X	IRU-1 AXIS 1X ANALOG RATE	- flat 0 deg/s
  AI1AX1Y	IRU-1 AXIS 1Y ANALOG RATE	- flat 0 deg/s
  AI1AX2X	IRU-1 AXIS 2X ANALOG RATE	- flat 0 deg/s
  AI1AX2Y	IRU-1 AXIS 2Y ANALOG RATE	- flat 0 deg/s
  AI2AX1X	IRU-2 AXIS 1X ANALOG RATE	- flat -3.72 deg/s
  AI2AX1Y	IRU-2 AXIS 1Y ANALOG RATE	- flat -3.72 deg/s
  AI2AX2X	IRU-2 AXIS 2X ANALOG RATE	- flat -3.72 deg/s
  AI2AX2Y	IRU-2 AXIS 2Y ANALOG RATE	- flat -3.72 deg/s
  AOATTQT1	EST. S/C ATTITUDE QUATERION 1 (ECI)	- nominal distribution
  AOATTQT2	EST. S/C ATTITUDE QUATERION 2 (ECI)	- nominal distribution
  AOATTQT3	EST. S/C ATTITUDE QUATERION 3 (ECI)	- nominal distribution
  AOATTQT4	EST. S/C ATTITUDE QUATERION 4 (ECI)	- nominal distribution
  AOCMDQT1	COMMANDED S/C ATTITUDE QUATERNION 1	- nominal distribution
  AOCMDQT2	COMMANDED S/C ATTITUDE QUATERNION 2	- nominal distribution
  AOCMDQT3	COMMANDED S/C ATTITUDE QUATERNION 3	- nominal distribution
  AOSCPOS1	S/C POSITION VECTOR X (ECI FRAME)	- flat
  AOSCPOS2	S/C POSITION VECTOR Y (ECI FRAME)	- flat
  AOSCPOS3	S/C POSITION VECTOR Z (ECI FRAME)	- flat
  AOSCVEL1	S/C VELOCITY VECTOR X ECI FRAME)	- distributed -1.5 to 0.8 km/s, more heavily 0.5 to 0.8
  AOSCVEL2	S/C VELOCITY VECTOR Y (ECI FRAME)	- evenly distributed -1.5 to 1.5 km/s
  AOSCVEL3	S/C VELOCITY VECTOR Z (ECI FRAME)	- evenly distributed -1.0 to 1.0 km/s
  AOSUNEC1	UNIT VECTOR FROM THE S/C TO THE SUN X (ECI FRAME)	- 365 day period, max around DOM 240, min around DOM 430
  AOSUNEC2	UNIT VECTOR FROM THE S/C TO THE SUN Y (ECI FRAME)	- 365 day period, max around DOM 333, approaching min
  AOSUNEC3	UNIT VECTOR FROM THE S/C TO THE SUN Z (ECI FRAME)	- 365 day period, max around DOM 333, approaching min
  AOTARQT1	TARGET ATTITUDE QUATERNION ELEMENT 1	- nominal distribution
  AOTARQT2	TARGET ATTITUDE QUATERNION ELEMENT 2	- nominal distribution
  AOTARQT3	TARGET ATTITUDE QUATERNION ELEMENT 3	- nominal distribution

  
  
• FTS temp & gradient

  MSID	DESCRIPTION	COMMENTS
  OHRTHR27	RT 20 : PERISCOPE	- around 297.12 K, perhaps very slight upward trend
  OHRTHR42	RT 133: PERISCOPE	- flat 294.10 K
  OHRTHR43	RT 134: PERISCOPE	- around 293.05 K, very slight upward trend
  OOBAGRD3	RT 505 TO RT 504: PERISCOPE GRADIENT MONITOR	- slight downward trend from 0.99 to 0.96 since Jan00
  OOBAGRD6	RT 507 TO RT 506: PERISCOPE GRADIENT MONITOR	- flat 0.03

  
  
• PCAD reaction wheel Rates

  MSID	DESCRIPTION	COMMENTS
  AORWCMD1	REACTION WHEEL TORQUE COMMANDS 1	- flat at 0.0
  AORWCMD2	REACTION WHEEL TORQUE COMMANDS 2	- flat at 0.0
  AORWCMD3	REACTION WHEEL TORQUE COMMANDS 3	- flat at 0.0
  AORWCMD4	REACTION WHEEL TORQUE COMMANDS 4	- flat at 0.0
  AORWCMD5	REACTION WHEEL TORQUE COMMANDS 5	- flat at 0.0
  AORWCMD6	REACTION WHEEL TORQUE COMMANDS 6	- flat at 0.0
  AORWCNT1	REACTION WHEEL TACH PULSE COUNTS 1	- evenly distributed -40 to 60 counts (since DOM 200)
  AORWCNT2	REACTION WHEEL TACH PULSE COUNTS 2	- evenly distributed -40 to 40 counts (since DOM 200)
  AORWCNT3	REACTION WHEEL TACH PULSE COUNTS 3	- evenly distributed -40 to 60 counts (since DOM 200)
  AORWCNT4	REACTION WHEEL TACH PULSE COUNTS 4	- evenly distributed -40 to 60 counts (since DOM 200)
  AORWCNT5	REACTION WHEEL TACH PULSE COUNTS 5	- evenly distributed -40 to 40 counts (since DOM 200)
  AORWCNT6	REACTION WHEEL TACH PULSE COUNTS 6	- evenly distributed -40 to 60 counts (since DOM 200)
  AORWMC1	COMMANDED REACTION WHEEL ANGULAR MOMENTUM 1	- evenly distributed 16 to 28 ftlbs
  AORWMC4	COMMANDED REACTION WHEEL ANGULAR MOMENTUM 4	- evenly distributed -28 to -16 ftlbs
  AORWMC5	COMMANDED REACTION WHEEL ANGULAR MOMENTUM 5	- evenly distributed 16 to 26 ftlbs
  AORWSPD1	REACTION WHEEL EST. SPEED 1	- evenly distributed 140 to 260 rad/s
  AORWSPD2	REACTION WHEEL EST. SPEED 2	- distributed -240 to -120 rad/s, slight downward trend -180 to -200 since mission start
  AORWSPD3	REACTION WHEEL EST. SPEED 3	- distributed 140 to 280 rad/s, slight downward trend 225 to 205 since mission start
  AORWSPD4	REACTION WHEEL EST. SPEED 4	- evenly distributed -260 to -120 rad/s
  AORWSPD5	REACTION WHEEL EST. SPEED 5	- evenly distributed 140 to 240 rad/s
  AORWSPD6	REACTION WHEEL EST. SPEED 6	- evenly distributed -260 to -140 rad/s

  
  

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