MTA Monitoring Report 12/22/17 - 12/28/17

Archive of all weekly reports
Archive of monthly reports

Radiation

Quiet

Detrended CTI

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.

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.

ACIS Focal Plane Temperature

For this period, 9 peaks are observed.

Day (DOY)	Temp (C)	Width (Days)
356.12	-113.16	1.17
356.95	-113.89	0.57
357.15	-113.82	0.38
357.58	-117.29	0.41
358.67	-112.86	1.13
359.57	-113.35	0.75
359.89	-108.94	0.93
361.06	-114.27	0.72
362.24	-113.56	0.71

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

8 TSC moves this period

weekly average time/step	0.00125 s
mission average time/step	0.00136 s

Telemetry

New violations or new extrema are shown in blue cells.

IRUs

• Gyro Bias Drift
• Gyro Bias Drift Histogram

Recent Observations

Trending

This week's focus is Sun Angle Correlations

Last reported on Oct 05.

Only the most interesting or representative msids are shown below. For a full listing choose the bulletted link.

Min/max envelopes in dark blue appear on the trending plots. The envelopes are 4th degree fits to the monthly minimum and maximum values for each MSID. The final polynomial form and binning are still being experimented with. We will soon add to the trending pages a report of the fits and predictions they give on future limit violations. The light blue curve is our original smoothing of all the data over 30 day moving boxcars. The green/yellow line is a linear fit to all the data; the break occurs at a limit change.

• ACIS Thermal

vs. Sun Angle
MSID	MEAN	RMS	DELTA/DEG	DELTA/DEG/DEG	UNITS	DESCRIPTION
1CBAT	208.51	3.15	0.01	-0.00	K	CAMERA BODY TEMP. A
1CBBT	209.96	3.88	8.277e-03	-1.220e-03	K	CAMERA BODY TEMP. B
1CRAT	146.42	1.89	0.01	0.00	K	COLD RADIATOR TEMP. A
1CRBT	147.08	2.16	0.02	0.00	K	COLD RADIATOR TEMP. B
1DACTBT	257.53	2.20	-7.742e-04	-8.947e-04	K	DA COLLIMATOR TEMP. B
1DEAMZT	285.71	6.26	0.09	-0.00	K	DEA -Z PANEL TEMP
1DPAMYT	287.06	6.49	0.10	-0.00	K	DPA -Y PANEL TEMP
1DPAMZT	290.28	6.22	0.09	-0.00	K	DPA -Z PANEL TEMP
1OAHAT	243.95	2.11	6.784e-03	-7.507e-04	K	OPEN ACTUATOR HOUSING TEMP. A
1OAHBT	240.39	2.04	3.935e-03	-6.519e-04	K	OPEN ACTUATOR HOUSING TEMP. B
1PDEAAT	304.39	7.81	-0.07	0.00	K	PSMC DEA PS A TEMP
1PDEABT	295.79	7.63	-0.07	0.00	K	PSMC DEA PS B TEMP
1PIN1AT	293.79	12.87	-0.03	0.00	K	PSMC TEMP 1A
1WRAT	190.38	2.36	0.02	-0.00	K	WARM RADIATOR TEMP. A
1WRBT	190.14	2.33	0.02	-0.00	K	WARM RADIATOR TEMP. B

• PCAD Thermal

vs. Sun Angle
MSID	MEAN	RMS	DELTA/DEG	DELTA/DEG/DEG	UNITS	DESCRIPTION
AACBPPT	296.01	2.74	0.01	NaN	K	AC BASEPLATE TEMP (PRIME)
AACBPRT	291.98	2.18	7.712e-03	NaN	K	AC BASEPLATE TEMP (RDNT)
AACCCDPT	258.42	3.74	-0.02	NaN	K	AC CCD TEMP (PRI)
AACCCDRT	291.39	2.36	8.439e-03	NaN	K	AC CCD TEMP (RDNT)
AACH1T	289.41	1.83	6.450e-03	NaN	K	AC HOUSING TEMP (ACH1)
AACH2T	289.47	1.83	6.493e-03	NaN	K	AC HOUSING TEMP (ACH2)
AAOTALT	289.17	1.78	6.479e-03	NaN	K	AC OPT TEL ASSY LENS TEMP
AAOTAPMT	288.66	1.74	6.214e-03	NaN	K	AC OPT TEL ASSY PRIMARY MIRROR TEMP
AAOTASMT	288.78	1.73	6.290e-03	NaN	K	AC OPT TEL ASSY SECONDARY MIRROR TEMP
AAOTH2MT	289.09	1.79	6.187e-03	NaN	K	AC OPT TEL ASSY SECONDARY MIRROR TEMP (HRMA)

• OBA Heaters

vs. Sun Angle
MSID	MEAN	RMS	DELTA/DEG	DELTA/DEG/DEG	UNITS	DESCRIPTION
OOBTHR01	509.36	28.87	0.01	0.00	CNT	IP INTERNAL CALIBRATION OBA CH. 0
OOBTHR02	284.28	1.03	-1.566e-04	4.808e-05	K	RT 25: HRMA STRUT
OOBTHR03	287.41	1.70	7.387e-04	7.917e-05	K	RT 26: HRMA STRUT
OOBTHR04	289.80	2.38	5.907e-04	6.766e-05	K	RT 27: HRMA STRUT
OOBTHR05	290.07	2.32	4.628e-04	5.101e-05	K	RT 28: HRMA STRUT
OOBTHR06	288.19	1.75	7.729e-04	7.672e-05	K	RT 29: HRMA STRUT
OOBTHR07	285.06	1.05	-4.643e-04	1.101e-05	K	RT 30: HRMA STRUT
OOBTHR08	287.67	3.40	-4.998e-03	-2.440e-04	K	RT 31: OBA CONE
OOBTHR09	287.32	3.13	-4.516e-03	-1.830e-04	K	RT 32: OBA CONE
OOBTHR10	286.50	2.88	-3.113e-03	-9.318e-05	K	RT 33: OBA CONE
OOBTHR11	285.93	2.86	-2.830e-03	4.809e-05	K	RT 34: OBA CONE
OOBTHR12	286.10	2.79	-3.326e-03	5.296e-05	K	RT 35: OBA CONE
OOBTHR13	284.57	2.31	-3.628e-03	7.498e-05	K	RT 36: OBA CONE
OOBTHR14	286.07	2.79	-3.876e-03	1.154e-05	K	RT 37: OBA CONE
OOBTHR15	286.37	2.90	-3.746e-03	3.585e-06	K	RT 38: OBA CONE

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