MTA Monitoring Report 04/25/03 - 05/01/03

The observing schedule was autonomously interrupted by SCS107 at 2003:120:23:36 UT due to a high radiation event. The high radiation is thought to be associated with the currently active coronal stream as Chandra approached the radiation belts, as was the case on April 17. The loads were restarted at 2003:121:21:15 UT.
Obsids affected: 3997 (partial), 4128, 3733. Lost science time: 25 ks.

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 8.485e-9 CTI/day
Detrended slope 8.732e-9 CTI/day

ACIS Warm Pixels

	CCD3	CCD5	CCD6	CCD7	CCD8
New this week/ Reappeared		(258,797)(383,586)			(587,544)
Previously reported - still observed		(226,565)(280,313) (341,427)(357,303) (369,376)(607,281)
Previously reported - not observed during this period			(766,501)
Flickering pixels	(811,637)	(263,317) (352,544),(367,511)	(360,249)	(199,678) (335,412)	(62,482),(1024,454) (1024,455),(1024,456)
Warm column candidates

ACIS Focal Plane Temperature

For this period, 2 peak are observed.

Day (DOY)	Temp (C)	Width (Days)
118.84	-118.41	0.09
121.59	-117.28	0.31

SIM Movements

10 TSC moves this period
weekly average time/step 0.00144 s
mission average time/step 0.00136 s

Telemetry

blue cells

here

MSID	04/25	04/26	04/27	04/28	04/29	04/30	05/01	yellow limits (lower) upper	red limits (lower) upper	Units	Description
1PIN1AT			305.06	305.06		303.78		(268.16) 303.16	(236.66) 309.66	K	PSMC TEMP 1A
1CRAT							150.00	(143.16) 148.16	(131.16) 183.16	K	COLD RADIATOR TEMP. A
1CRBT				150.00			150.00	(143.16) 148.16	(131.16) 183.16	K	COLD RADIATOR TEMP. B
TEPHIN		303.89		301.58	301.58	303.29	302.09	(260.8) 300.2	(258.0) 303.0	K	EPHIN SENSOR HOUSING TEMP
5EPHINT		302.38		301.53	300.67	303.23	302.38	(261.0) 300.0	(258.0) 303.0	K	EPHIN TEMP
HKBBIASLEAKI		0.63		0.63	0.54	0.69	0.65	(-100.0) 0.5	(-200.0) 0.7	uA	EPHIN HOUSEKEEPING B-BIAS: LEAKAGE CURRENT (5EHSE500)
HKEBIASLEAKI						31.13		(-100.0) 30.0	(-200.0) 40.0	uA	EPHIN HOUSEKEEPING E-BIAS: LEAKAGE CURRENT (5EHSE800)
HKP27I		5.83		5.75	5.60	6.07	5.91	(3.66) 5.24	(3.46) 5.44	AMP	HK 27 Volts Rail - Current
HKP6V		(5.76)				(5.76)		(5.76) 5.86	(5.74) 5.88	V	HK 6 Volts Rail - Voltage
TEMPHOUS							288.35	(4.85) 288.0	(-22.95) 290.0	C	temp 2 - AC housing (AACH1T)
AAOTH2MT				287.76			287.76	(286.50) 287.53	(286.40) 287.63	K	AC OPT TEL ASSY SECONDARY MIRROR TEMP (HRMA)
AIRU1G1I	175.20	168.00	168.00	165.60	168.00	170.40	163.20	(-5.0) 150	(-10.0) 200.0	MAMP	IRU-1 GYRO #1 CURRENT
FAMTRTEMP	286.65	286.65	286.26	286.15	285.16	285.68	286.65	(260.0) 282.0	(255.0) 285.0	K	FA motor temperature
PSUTEMP	322.65	322.15	322.15	322.15			(313.8) 321.85	(312.6) 323.05	K	SEA power supply temperature (3FAPSAT)
BOXTEMP	294.15	294.15	293.65	293.65	292.65	293.15	292.15	(278.0) 292.0	(276.0) 294.0	K	SEA box temperature
3TTHRC2T	295.46	295.46	296.47	295.97	295.46	295.97		(243.0) 293.0	(218.5) 353.0	K	TT AT HRC BIPOD ATTACH #2
3FAMYZAT	308.77		308.14	308.77				(253.0) 308.0	(225.0) 353.0	K	FA STRUCTURE +X FACE AT -Y-Z END ABORT HTR. FA6 TEMP
TSCIUSF1	359.12	359.12	359.12	359.12	357.55	357.55		(230.2) 346.9	(227.4) 349.7	K	SC-IUS FITTING-1 TEMP
TSCIUSF8	359.12	359.12	359.12	359.12	357.55	357.55		(230.2) 346.9	(227.4) 349.7	K	SC-IUS FITTING-8 TEMP
TCYLAFT1	297.45	298.48	298.48	299.51	296.93	299.00	297.96	(260.8) 294.1	(227.4) 349.7	K	CNT CYL TEMP:16-IN FWD OF SC-TS FIT-1
TCYLAFT6	296.42	297.45	296.42	297.45	295.90	297.96	296.42	(260.8) 294.1	(227.4) 349.7	K	CNT CYL TEMP:16-IN FWD OF SC-TS FIT-6
TMZP_CNT	327.66	332.41	327.66	329.78	328.72	330.84		(237.4) 327.4	(227.4) 349.7	K	-Z PNL TEMP:CENTER
TFSSBKT1	333.98	338.70	333.98	335.56	335.56	337.13		(237.4) 333.0	(223.0) 348.0	K	FSS BRACKET-1 TEMP (+Y)
TFSSBKT2	333.98	338.70	333.98	335.56	335.56	335.56		(237.4) 333.0	(223.0) 348.0	K	FSS BRACKET-2 TEMP (-Y)
TSCTSF1				295.00		294.55	294.55	(260.8) 294.1	(253.0) 303.0	K	SC-TS FITTING -1 TEMP
TB1T3							(270.09)	(270.2) 298.0	(268.0) 300.8	K	BATT 1 TEMP 3
TRSPMTPC	295.00	295.45	295.00	295.00	294.55	295.00		(260.8) 294.1	(216.3) 349.7	K	RAD SHR PNL TEMP:TTWN MUPS AND PCAD
TMZLGABM							323.42	(244.1) 321.9	(208.0) 388.0	K	-Z LOW-GAIN ANTENNA BOOM TEMP
TPZLGABM	(207.85)	(207.85)	(207.85)	(207.85)	(207.85)	(207.85)	(207.85)	(208.0) 321.9	(206.0) 388.0	K	+Z LOW-GAIN ANTENNA BOOM TEMP
OOBTHR31	289.72		289.77	289.77				(281.9) 289.7	(250.2) 308.0	K	RT 53: OBA AFT BULKHEAD
OOBTHR56		288.65		288.65		288.74	288.83	(281.9) 288.6	(250.2) 308.0	K	RT 158: OBA CONE
OOBTHR57	289.28	289.19	289.28	289.28	289.28	289.37		(281.9) 288.6	(250.2) 308.0	K	RT 150: OBA CONE
4RT591T				289.00		288.75	289.00	(281.9) 288.6	(250.2) 308.0	K	RT 591 - STRUT TEMP
Gratings					HETG Insert
Nominal SCS-107 related limit trips
1DPICACU						(0.39)	(0.40)	(0.90) 1.75	(-1000) 1000	AMP	DPA INPUT CURRENT A
1DPICBCU						(0.24)	(0.25)	(0.70) 1.75	(-1000) 1000	AMP	DPA INPUT CURRENT B
1DPPWRA						(11.74)	(11.74)	(23.4) 59.5	(-999) 999	W	DPA POWER A
1DPPWRB						(7.61)	(7.61)	(18.2) 59.5	(-999) 999	W	DPA POWER B

IRUs

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. The procedure and products to perform a swap to IRU-2 were approved last week by the Flight Director Board and are available in the event they are needed.

Reaction wheel speeds have occasionally dropped below the limit of 52.4 rad/s due to our increased momentum envelope.

Recent Observations

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

OBSID	DETECTOR	GRATING	TARGET	ANALYSIS	ACA
3997	ACIS-S	NONE	NGC 4450	Partial?	Prob
4014	ACIS-S	NONE	NGC4102	OK	OK
4138	ACIS-S	NONE	FIRST J122749+321459	OK	OK
3837	ACIS-I	NONE	TYCHO'S SNR	1/2.Dith.Off	OK
4384	ACIS-I	NONE	PSR B1509-58	Dith.Off	OK
4106	ACIS-S	NONE	F04103-2838	Dith.Off	OK
3832	ACIS-S	NONE	3C58	Dith.Off	OK
4382	ACIS-S	NONE	3C58	OK	OK


MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
4RT590T	2.845e+02	1.174e+00	6.522e-01	-3.417e-01	K	RT 590 - STRUT TEMP
4RT591T	2.850e+02	1.266e+00	7.264e-01	-2.913e-01	K	RT 591 - STRUT TEMP
4RT597T	2.844e+02	8.544e-01	5.421e-01	-7.074e-01	K	RT 597 - TFTE TEMP
4RT598T	2.842e+02	9.231e-01	5.924e-01	-4.231e-01	K	RT 598 - TFTE TEMP

OB Forward Bulkhead


MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
4RT700T	2.857e+02	4.048e-01	2.431e-01	-2.644e-01	K	RT 700 - OB BULKHEAD TEMP

Pre-collimator


MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
4PRT4AT	2.148e+02	6.981e-01	1.233e-01	-1.542e-01	K	IP A: PRE-COLLIMATOR PRT 4 TEMPERATURE


MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
4RT575T	2.853e+02	3.474e-01	2.040e-01	-2.876e-01	K	RT 575 - OB CONE TEMP
4RT577T	2.841e+02	3.762e-01	1.546e-01	-3.723e-01	K	RT 577 - OB CONE TEMP