MTA Monitoring Report 06/06/03 - 06/12/03

Archive of monthly reports

A busy week of spacecraft activities.
Realtime procedures performed on 6/12:

- Momentum dump (CAP 830 & 831)
- IRU-1 hot restart (CAP 848)
- Lower ACA temperature one more degree (CAP 843)

- Momentum unload:

* Was done in "Lukewarm" conditions and thruster performance was nominal.
* We have found that momentum dumps in hot or warm conditions
produce anomalous thruster results, but that dumps in cold or (now known)
"lukewarm" conditions are nominal.
* Can always run dumps in conditions which produce nominal results.

- IRU-1 Gyro 1 Hot restart

* Lowered gyro 1 current to 96mA, still there after about 24 hours.
* Kearfott expects the current to rise back to the previous levels ~150 mA)
over the next several weeks, unless the problem was electronic in nature.
In this case the current may stay down.

- ACA temperature dropped another degree to -13C, decreased dark current substantially.

Radiation

Quiet.

Detrended CTI

CTI analysis is now computed with "detrending":
Detrend CTI = Measured CTI + S3 amplitude reject rate * Detrend factor.

Average of ACIS-I CCDs (MnKa) slope 8.170e-9 CTI/day
Detrended slope 8.417e-9 CTI/day

ACIS Warm Pixels

	CCD0	CCD1	CCD2	CCD3	CCD4	CCD5	CCD6	CCD7	CCD8	CCD9
New this week/ Reappeared	(1024,41)					(109,1)
Previously reported - still observed						(280,313)(357,303) (369,376)(341,427) (607,281)			(326,978) (356,902)	(150,374)
Previously reported - not observed during this period					(227,467) (247,364)
Flickering pixels	(1024,40)			(811,637)		(226,565)(258,797) (263,317)(352,544) (367,511)(383,586) (383,587)(669,577) (1023, 166)	(360,249) (776,501)	(199,678) (335,412)	(62,482) (587,544) (1024,456)
Warm column candidates

ACIS Focal Plane Temperature

Day (DOY)	Temp (C)	Width (Days)
158.54	-113.08	0.31
161.21	-116.32	0.26

SIM Movements

Telemetry

New violations or new extrema are shown in blue cells. Recurrent problems are tracked here.



MSID	06/06	06/07	06/08	06/09	06/10	06/11	06/12	yellow limits (lower) upper	red limits (lower) upper	Units	Description
1CRAT		154.80		150.00	150.00		150.00	(143.16) 148.16	(131.16) 183.16	K	COLD RADIATOR TEMP. A
1CRBT		154.80		150.00	150.00		150.00	(143.16) 148.16	(131.16) 183.16	K	COLD RADIATOR TEMP. B
TEPHIN		302.69			304.49	304.49	303.89	(260.8) 300.2	(258.0) 303.0	K	EPHIN SENSOR HOUSING TEMP
5EPHINT		301.95			304.08	304.08	304.08	(261.0) 300.0	(258.0) 303.0	K	EPHIN TEMP
HKP6V					(5.76)	(5.76)	(5.76)	(5.76) 5.86	(5.74) 5.88	V	HK 6 Volts Rail - Voltage
PSUTEMP	322.65	322.65						(313.8) 321.85	(312.6) 323.05	K	SEA power supply temperature (3FAPSAT)
BOXTEMP	294.15	294.15						(278.0) 292.0	(276.0) 294.0	K	SEA box temperature
TSCIUSF8	355.98	357.55						(230.2) 346.9	(227.4) 349.7	K	SC-IUS FITTING-8 TEMP
TMZP_CNT		329.78						(237.4) 327.4	(227.4) 349.7	K	-Z PNL TEMP:CENTER
IRU-2 and SPE-B limits are temporarily suspended. Values reported below are outside IRU-2 OFF range, but within the corresponding IRU-1 ON operating range.
AGWS2V			2.72	2.72	2.72	2.72	2.72	(-0.1) 0.5	(-1) 0.6	V	GYRO WHEEL SUPPLY 2 INPUT VOLTAGE
AIRU2G1T			342.26	342.26	342.26	342.26	342.26	(291.0) 294.0	(290.0) 295.0	K	IRU-2 GYRO #1 TEMP
AIRU2G2T			342.49	342.49	342.49	342.49	342.49	(291.0) 294.0	(290.0) 295.0	K	IRU-2 GYRO #2 TEMP
AIRU2VFT			334.67	334.67	334.67	334.67	334.67	(291.0) 294.0	(290.0) 295.0	K	IRU-2 VFC TEMP
ASPEB5CV	5.24	5.28	5.24	5.28	5.24	5.24	5.24	(-0.1) 0.7	(-1.0) 0.8	V	SPE-B +5V CONVERTER VOLTAGE
ACA Thermal limit violations may be due to the intentional cooling of the CCD.
AACCCDPT	(260.60)	(260.60)	(260.60)	(260.60)	(260.60)	(260.60)	(259.73)	(262.29) 262.93	(262.14) 263.09	K	AC CCD TEMP (PRI)
AACCCDRT	289.77	290.44	290.44	290.10	290.44	290.44	290.77	(287.28) 289.58	(287.13) 289.73	K	AC CCD TEMP (RDNT)
AAOTH2MT	287.76	288.43	288.43	288.43	288.76	288.76	288.76	(286.50) 287.53	(286.40) 287.63	K	AC OPT TEL ASSY SECONDARY MIRROR TEMP (HRMA)
AAOTALT	288.10	288.76	288.76	288.43	288.76	288.76	288.76	(286.75) 287.91	(286.60) 288.06	K	AC OPT TEL ASSY LENS TEMP
AAOTASMT		288.43	288.43	288.10	288.43	288.43	288.43	(286.25) 287.91	(286.15) 288.06	K	AC OPT TEL ASSY SECONDARY MIRROR TEMP
TEMPPRIM		288.75	288.75	288.75	288.75	288.75	289.15	(-54.45) 288.0	(-58.45) 290.0	C	temp 3 - lens cell (AAOTALT)
TEMPSEC		288.35	288.35		288.35	288.35	288.35	(-54.45) 288.0	(-58.45) 290.0	C	temp 4 - secondary mirror (AAOTASMT)
Many new limits violations are seen on HRMA and OBA Thermal. See the trending section of this report.
OOBTHR05		288.71	288.84	288.67	288.84	289.23	289.23	(281.9) 288.6	(250.2) 308.0	K	RT 28: HRMA STRUT
OOBTHR39	286.03	286.68	286.64	286.42	286.86	286.90	286.90	(281.9) 285.8	(250.2) 308.0	K	RT 61: TFTE CONE
OOBTHR40	285.84	286.20	286.20	286.15	286.28	286.28	286.28	(281.9) 285.8	(250.2) 308.0	K	RT 62: TFTE CONE
OOBTHR45					288.67	288.72	288.72	(281.9) 288.6	(250.2) 308.0	K	RT 67: TFTE COVER
OOBTHR47	266.33	267.33	266.77	270.21	266.44	266.00	267.33	(255.2) 261.9	(233.0) 355.2	K	RT 69: TFTE COVER
OOBTHR56					290.35	290.44	290.44	(281.9) 288.6	(250.2) 308.0	K	RT 158: OBA CONE
OOBTHR62				288.61				(281.9) 288.6	(250.2) 308.0	K	RT 155: OBA FWD BULKHEAD
4RT584T						288.75	288.75	(281.9) 288.6	(250.2) 308.0	K	RT 584 - STRUT TEMP
4RT585T		288.75	289.00	288.75	289.00	289.26	289.26	(281.9) 288.6	(250.2) 308.0	K	RT 585 - STRUT TEMP
4RT596T	290.00	290.33	290.33	291.30	290.33	290.00	290.33	(279.7) 283.0	(233.0) 308.0	K	RT 596 - TFTE TEMP
4RT708T		286.07	286.07	286.07	286.07	286.07	286.07	(281.9) 285.8	(250.2) 308.0	K	RT 708 - OB BULKHEAD TEMP
4RT709T					286.07	286.07	286.07	(281.9) 285.8	(250.2) 308.0	K	RT 709 - OB BULKHEAD TEMP
4RT710T		286.07	286.07		286.38	286.38	286.38	(281.9) 285.8	(250.2) 308.0	K	RT 710 - OB BULKHEAD TEMP
4RT711T		286.07	286.07		286.38	286.38	286.38	(281.9) 285.8	(250.2) 308.0	K	RT 711 - OB BULKHEAD TEMP
Gratings	HETG RETR	HETG INSR	HETG RETR		LETG INSR

IRUs

• Gyro Bias Drift
• Gyro Bias Drift Histogram

The gyro bias level has remained unaffected by the change in current and so to date, there has been no impact to science or operations.

Recent Observations

"Prob" means that there was probably bad time data included in the manual runs. This will be corrected in future processing.

Trending

• OBAHEATERS Past 2 weeks  Mission Trends

  May 25, 2003 - June 12, 2003
  MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
  OOBTHR05	2.880e+02	4.641e-01	1.392e+01	-8.728e-01	K	RT 28: HRMA STRUT
  OOBTHR39	2.855e+02	6.677e-01	3.265e+01	-5.796e-01	K	RT 61: TFTE CONE
  OOBTHR40	2.846e+02	9.715e-01	5.336e+01	-3.386e-01	K	RT 62: TFTE CONE
  OOBTHR45	2.870e+02	7.623e-01	2.215e+01	-1.215e+00	K	RT 67: TFTE COVER
  OOBTHR47	2.603e+02	4.086e+00	2.240e+02	-2.031e-02	K	RT 69: TFTE COVER
  OOBTHR56	2.883e+02	1.047e+00	2.280e+01	-1.667e+00	K	RT 158: OBA CONE
  OOBTHR62	2.852e+02	2.105e+00	1.172e+02	-3.362e-01	K	RT 155: OBA FWD BULKHEAD

  
  
• HRMA Struts Past 2 weeks  Mission Trends

  May 25, 2003 - June 12, 2003
  MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
  4RT595T	2.831e+02	1.964e-01	2.772e+00	-7.671e-02	K	RT 595 - TFTE TEMP
  4RT596T	2.837e+02	4.300e+00	2.396e+02	-3.926e-01	K	RT 596 - TFTE TEMP

  
  
• OB FORWARD BULKHEAD Past 2 weeks  Mission Trends

  May 25, 2003 - June 12, 2003
  MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
  4RT708T	2.839e+02	1.369e+00	7.612e+01	-3.415e-01	K	RT 708 - OB BULKHEAD TEMP
  4RT711T	2.851e+02	5.861e-01	2.784e+01	-6.015e-01	K	RT 711 - OB BULKHEAD TEMP