MTA Monitoring Report 08/21/20 - 08/27/20

Archive of all weekly reports
Archive of monthly reports

Chandra is in SCS-107 mode since Aug 24 due to the HRC power supply voltages are out of state.

Although we prefer to quote CTI values of the cleanest data (FT <= -119.7 C, int time > 7000sec), the data that fulfills these conditions are getting rare. We now quote CTI based on temperature corrected data for Focal plane temperature <= -118.5 C).

The unit is now CTI/year not CTI/day.

Average of ACIS-I CCDs (MnKa) slope:	5.725e-02 CTI/year	(1.568e-04 CTI/day)
Detrended slope:	6.236e-02 CTI/year	(1.708e-04 CTI/day)

ACIS Warm Pixels

We display all bad pixels that have showed up in past, and, if any, previously unknown bad pixels appeared in the last 14 days. We also list hot pixels (defined as 1000 above the average of bias background). Warm columns 509-514 are probably due to boundaries.

New definitions of warm pixels and flickering pixels (May 15, 2014). If a pixel displays the level beyond a threshold for more than 70% of the time in the past two weeks, the pixel is categorized as a "warm" pixel. If a pixel is above the threshold more than 30% of time but less than 70% of the time in the past two weeks, the pixel is categorized as a "flickering" pixel.

	CCD0	CCD1	CCD2	CCD3	CCD5	CCD6	CCD7	CCD8
Previously Unknown Bad Pixels
Current Warm Pixels							(335,412)
Flickering Warm Pixels	(154,9) (143,700) (692,141)	(802,665) (787,181) (910,239)	(526,66) (726,537) (178,149) (665,25)	(753,344) (21,95) (811,637) (144,50)		(670,387) (287,164) (1000,214)		(675,304) (139,109) (881,53) (197,241)
Current Hot Pixels
Flickering Hot Pixels
Warm column candidates					512 1022 510		512 1022
Flickering Warm column candidates

ACIS Focal Plane Temperature

For this period, 8 peaks are observed.

Day (DOY)	Temp (C)	Width (Days)
233.00	-116.25	0.33
233.78	-114.38	0.54
234.84	-112.61	0.56
235.39	-110.00	0.72
236.37	-112.27	0.97
237.14	-114.84	0.47
238.34	-116.00	0.44
239.93	-115.87	0.53

Weekly focal plane temperature with sun angle, earth angle, and altitude overplotted. Sun angle is the solar array angle, that is the angle between the sun and the optical axis (+X axis). The earth angle is the angle between earth and the ACIS radiator (+Z axis). Altitude varies from 34 kkm to 128 kkm.

SIM Movements

10 TSC moves this period

weekly average time/step	0.00128 s
mission average time/step	0.00136 s

Telemetry

New violations or new extrema are shown in blue cells.

MSID	08/21/20	08/22/20	08/23/20	08/24/20	08/25/20	08/26/20	08/27/20	yellow limits (lower) upper	red limits (lower) upper	Units	Description
TCM_PA2			(260.05)					(269.15) 348.15	(260.15) 413.15	K	RF POWER AMP-2 EXT BPL TEMP
ELBI					66.62	66.35		(20.0) 60.0	(13.0) 66.0	AMP	LOAD BUS CURRENT (HIGH RANGE)
2CHTRPZT				311.02				(273.15) 308.15	(235.65) 310.65	K	CENTRAL ELECTRONICS BOX TEMP
OBACONEAVG	303.83	302.39		301.96	304.56	304.80	305.22	(282.5) 300.0	(281.8) 301.0	K	OBA CONE AVG TEMP
TCM_TX1	(267.33)	(268.79)	(266.97)	(268.06)	(268.79)		(268.43)	(283.15) 348.15	(269.15) 404.15	K	TRANSPONDER-1 EXT BPL TEMP
TSCTSF3		(267.70)	(266.61)	(266.61)	(267.33)	(267.33)	(268.06)	(278.15) 359.15	(269.15) 483.15	K	SC-TS FITTING -3 TEMP
OBADIAGRAD					4.05			(-1.11) 3.5	(-2.78) 3.9	K	OBA DIAM GRAD
OBAAVG						301.19	301.49	(282.5) 300.0	(281.4) 301.0	K	OBA/TFTE TEMP
TPCP_RW3			(277.17)	(277.89)				(288.15) 363.15	(278.15) 404.15	K	RWA -3 TEMP (+Z PCAD COMP)
TCM_PA1	(259.69)		(258.96)	(260.05)				(269.15) 348.15	(260.15) 413.15	K	RF POWER AMP-1 EXT BPL TEMP

IRUs

Gyro Bias Drift	Gyro Bias Drift Histogram

Recent Observations

OBSID	DETECTOR	GRATING	TARGET	ANALYSIS	ACA
21713	ACIS-01236	NONE	RXC J1313.1+4616	OK	OK
24616	ACIS-678	NONE	TXS 2116-077	OK	OK
22937	ACIS-0123	NONE	Sgr A*	OK	OK
22329	ACIS-7	NONE	GJ 358	OK	OK
22718	ACIS-01236	NONE	J1315+516	OK	OK
23053	ACIS-7	NONE	H1821+643	OK	OK
24617	ACIS-23678	NONE	TXS 2116-077	OK	OK
22670	ACIS-7	NONE	Swift J1858.6-0814	OK	OK
22534	ACIS-678	NONE	SDSS J1407+2418	OK	OK
24618	ACIS-23678	NONE	TXS 2116-077	OK	OK
22652	ACIS-5678	NONE	COBRA141155.2+341510	OK	OK

MSID	Mean	RMS	Delta/Yr	Delta/Yr/Yr	Unit	Description
5eiot	0.960	0.028	(3.39+/-0.16)e2	-0.36 +/- 0.42	K	EIO TEMP
5ephint	2.493	0.012	(3.15+/-0.17)e2	-0.30 +/- 0.18	K	EPHIN TEMP
teio	1.690	0.025	(3.14+/-0.17)e2	-0.67 +/- 0.47	K	EPHIN ELECTRONICS HOUSING TEMP
tephin	2.497	0.013	(3.15+/-0.17)e2	-0.21 +/- 0.19	K	EPHIN SENSOR HOUSING TEMP

If you have any questions, please contact: swolk@head.cfa.harvard.edu

MTA Monitoring Report 08/21/20 - 08/27/20

Chandra is in SCS-107 mode since Aug 24 due to the HRC power supply voltages are out of state.

Radiation

Detrended CTI