MTA Monitoring Report 05/22/15 - 05/28/15

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.

Average of ACIS-I CCDs (MnKa) slope: 1,577e-6 CTI/year (4.321e-9 CTI/day)
Detrended slope: 1.572e-6 CTI/year (4.307e-9 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.

 CCD0CCD1CCD2CCD3CCD4CCD5CCD6CCD7CCD8CCD9
Previously Unknown Bad Pixels                    
Current Warm Pixels (153,205) (143,700) (910,239) (802,665) (726,537) (21,95)            
Flickering Warm Pixels (692,141) (427,125)   (811,637)   (607,281) (357,303) (369,376) (233,314) (280,313) (161,206) (341,427) (1000,214) (335,412)    
Current Hot Pixels                    
Flickering Hot Pixels                    
Warm column candidates         884 510 512 1022   512 1022    
Flickering Warm Column Candidates                    

ACIS Focal Plane Temperature

For this period, 5 peaks are observed.

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

Telemetry

New violations or new extrema are shown in blue cells.

MSID 05/22/15 05/23/15 05/24/15 05/25/15 05/26/15 05/27/15 05/28/15 yellow limits
(lower)
upper 		red limits
(lower)
upper 		Units Description
OHRTHR27 297.34 297.31 297.33 297.34 297.34 297.34 297.34 (295.48)
297.15		(279.37)
307.15		 K #RT 20 : PERISCOPE
OHRTHR42 294.59 294.43 294.51 294.51 294.51 294.66 294.65 (292.15)
294.37		(279.37)
307.15		 K #RT 133: PERISCOPE
OHRTHR43 294.54 294.11 294.35 294.35 294.33 294.75 294.74 (291.59)
293.26		(279.37)
307.15		 K #RT 134: PERISCOPE
3TSMXCET 270.79 270.79 268.30 268.30 273.29 265.81 268.30 (153.15)
263.15		(148.15)
353.15		 K #-X TURTLE SHELL NR HRC CEA
3TSMXSPT 310.70 313.19 308.21 308.21 310.70 305.71 308.21 (203.15)
294.15		(148.15)
354.15		 K #-X TURTLE SHELL NR ACIS SS


IRUs

Recent Observations

OBSID DETECTOR GRATING TARGET ANALYSIS ACA
16461 ACIS-0123 NONE Chandra Deep Field-South OK OK
16949 ACIS-2367 NONE G1.9+0.3 OK OK
16723 ACIS-7 NONE GRO J1750-27 OK OK
17662 ACIS-01236 NONE 2S1553-542 OK OK
17031 ACIS-678 NONE NGC5643 OK OK
16694 ACIS-56789 HETG MXB 1730-335 CC OK
17470 ACIS-678 NONE LBQS 2201-1834 OK OK
16990 ACIS-23678 NONE NGC3949 OK OK
17150 ACIS-0123 NONE Abell1882 - Filament #2 OK OK
17396 HRC-I NONE Coma Cluster CAL OK
17000 ACIS-23678 NONE IC5052 OK OK
16191 ACIS-0123 NONE Chandra Deep Field-South OK OK
17443 ACIS-01237 NONE M31 bulge OK OK
16445 ACIS-012367 NONE 30 Doradus OK OK

Trending

This week's focus is Spacecraft Bus and Subsystem Trends.

Last reported on Mar 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.



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