MTA Monitoring Report 09/28/12 - 10/04/12

Archive of all weekly reports
Archive of monthly reports

Radiation

Oct 02, 16:00 EST, the ACE P3 fluence monitor registered 1.0e9 four the fluence during this orbit. Most of the accumulated flux was from early in the orbit. Current rates in the P3 channel are low, under 1000, close to 700-600.

Detrended CTI

Although we have quoted CTI values of the cleanest data (FT <= -119.7 C, int time > 7000sec), the data fills these conditions are getting rare. We quote CTI temperature factor corrected ones. The values in the parentheses are CTI based on the cleanest data.

ACIS Warm Pixels

We display all bad pixels 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 a computational artificial effect due to boundaries.

ACIS Focal Plane Temperature

For this period, 3 peaks are observed.

Day (DOY)	Temp (C)	Width (Days)
272.10	-108.48	0.27
274.74	-111.10	0.17
277.38	-111.77	0.16

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

11 TSC moves this period

weekly average time/step	0.00134 s
mission average time/step	0.00133 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 Ephin.

Last reported on Jul 12.

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.

• EPHIN Temperatures and Voltages

MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
335.06	15.84	1.849e+00	-2.737e-02	K	EIO TEMP
5EPHINT	311.10	8.64	2.613e+00	4.728e-01	K	EPHIN TEMP
HKP5I	41.38	2.70	-1.195e-01	-2.326e-02	AMP	HK 5 Volts Rail - Current
TEPHIN	311.19	8.71	2.585e+00	9.051e-01	K	EPHIN SENSOR HOUSING TEMP

• EPHIN Temperatures and Voltages

Previous Quarter
MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
5EIOT	347.56	16.93	1.028e+02	1.491e+02	K	EIO TEMP
5EPHINT	322.08	5.54	2.823e+01	-4.963e+02	K	EPHIN TEMP
HKP5I	40.48	1.89	4.092e+00	-5.535e+01	AMP	HK 5 Volts Rail - Current
TEPHIN	322.29	5.72	3.438e+01	-4.287e+02	K	EPHIN SENSOR HOUSING TEMP

• EPHIN Rates vs. Temperature

Count rates vs. Temperature
MSID	MEAN	RMS	DELTA/K	DELTA/K/K	UNITS	DESCRIPTION
SCE1300	1.238e+03	1.017e+04	-29.10	7.43	E1300	sci coincidence counter
SCE150	1.052e+05	4.458e+05	3.825e+03	2.069e+01	E150	sci coincidence counter
SCINTL1	1.32	1.87	0.04	-0.00		SCINTL1
Electronics vs. Temperature

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