- M&TA MONTHLY REPORT -

OUTLINE

1. Configuration
2. ACIS
• Dose
• CTI
• Focal Plane Temperature
• Bad Pixels
3. HRC - Dose
4. Gratings - Focus
5. PCAD
• ACA Trending
• Gyro bias drift
• Science Instrument Positional Change Monitoring
6. Radiation History
7. Quarterly Trending
8. Spacecraft Motions
9. Past Monthly Report

Configuration/Radiation Overview for Feb 2012

ACIS

ACIS DOSE Registered-Photon-Map

The steps we took to compute the dose map are;

• Level 1 Event files for a specified month are obtained from archive.
• Image data including I2, I3, S2, S3 CCDs are extracted from all event files.
• All the extracted image data were merged to create a month long exposure map for the month.
• The exposure map is opened with ds9, and check a distribution of count rates against energy. From this, estimate the upper threshold value. Any events beyond this upper threshold are assumed erroneous events such as bad pixels.
• Using this upper threshold, the data is filtered, and create a cleaned exposure map for the month.
• The exposure map from each month from the Sep 1999 is added up to create a cumulative exposure map for each month.
• Using fimgstatistic, we compute count rate statistics for each CCDs.
• For observations with high data drop rates (e.g., Crab nebula, Cas A), we corrected the
observations by adding events.

Note: Counts and RMS's of Cumulative maps are lower than the previous months. This is because we excluded extreme outliers.

Please check more detail plots at Telemetered Photon Dose Trend page.

Feb Dose Map

TOTAL

CCD I3

CCD S3

Statistics:
# IMAGE     NPIX        MEAN           RMS              MIN     MAX
ACIS_jan12 6004901       7.105          9.979           0.0     480 

 I2 node 0  262654      6.156525        2.830235        0.0      52.0
 I2 node 1  262654      6.439131        3.260210        0.0     172.0
 I2 node 2  262654      6.268764        2.823398        0.0      46.0
 I2 node 3  262654      6.233135        3.011559        0.0      35.0

 I3 node 0  262654      6.131596        2.810484        0.0      29.0
 I3 node 1  262654      6.726669        5.952808        0.0     400.0
 I3 node 2  262654      6.139745        2.797797        0.0      45.0
 I3 node 3  262654      6.099098        2.755044        0.0      99.0

 S2 node 0  262654      9.466923        3.907459        0.0     403.0
 S2 node 1  262654      9.809096        4.393136        0.0      85.0
 S2 node 2  262654      10.374341       4.650428        0.0     117.0
 S2 node 3  262654      10.180826       4.470108        0.0     446.0

 S3 node 0  262654      17.222970       17.777268       0.0     155.0
 S3 node 1  262654      15.409535       11.243775       0.0     132.0
 S3 node 2  262654      12.774862       4.253203        0.0      45.0
 S3 node 3  262654      12.035053       3.860302        1.0      41.0

Cumulative Dose Map

TOTAL

CCD I3

CCD S3

Statistics:
 IMAGE        NPIX      MEAN             RMS            MIN    MAX
ACIS_total  6004901    1579.17          2114.57        0.0    95047

 I2 node 0  262654      1306.346520     252.934040      0.0     6644.0
 I2 node 1  262654      1379.003360     340.289915      0.0     27941.0
 I2 node 2  262654      1412.852432     305.722644      0.0     8916.0
 I2 node 3  262654      1408.254263     359.829614      0.0     27692.0

 I3 node 0  262654      1475.586817     359.695111      0.0     6525.0
 I3 node 1  262654      1549.006340     1171.748728     0.0     30132.0
 I3 node 2  262654      1347.254987     245.186401      0.0     6448.0
 I3 node 3  262654      1333.062298     260.880264      0.0     23752.0

 S2 node 0  262654      1887.729714     263.186701      981.0   20167.0
 S2 node 1  262654      2007.915784     433.504314      1014.0  11064.0
 S2 node 2  262654      2228.930185     421.904660      1321.0  16072.0
 S2 node 3  262654      2159.581193     314.008434      1260.0  34243.0

 S3 node 0  262654      3289.066728     1649.202701     1366.0  13069.0
 S3 node 1  262654      4467.348354     1958.965175     0.0     13570.0
 S3 node 2  262654      3387.604469     908.785464      1289.0  8464.0
 S3 node 3  262654      2612.827412     418.196332      1460.0  9480.0

Nov 2011	Aug 2011	May 2011	Feb 2011

The Mean Detrended CTI

We report CTIs with a refined data definition. CTIs were computed for the temperature dependency corrected data. Please see CTI page for detailed explanation. CTI's are computed for Mn K alpha, and defined as slope/intercept x10^4 of row # vs ADU. Data file: here

Focal Plane Temperature

Feb 2012 Focal Temperature

Averaged Focal Plane Temperature

We are using 10 period moving averages to show trends of peak temperatures and peak widths. Note, the gaps in the width plot are due to missing/corrupted data.

Focal Plane Temperature, Sun Angle and Altitude

Bad Pixels

The plots below were generated with a new warm pixel finding script. Please see Acis Bad Pixel Page for details.

Front Side CCDs

Back Side CCD (CCD5)

Science Instrument Background Rates

TOP

HRC

DOSE of Central 4K Pore-Pairs

Please refer to Maximum Dose Trends for more details.

 
        IMAGE                NPIX      MEAN    STDDEV      MIN       MAX 
HRCI_02_2012.fits          16777216   0.139    1.329       0.0       94.0 

        IMAGE                NPIX      MEAN    STDDEV      MIN       MAX
HRCI_08_1999_02_2012.fits  16777216   3.745    4.609       0.0       292.0                                

        IMAGE                NPIX      MEAN    STDDEV      MIN       MAX 
HRCS_02_2012.fits          16777216   0.070    0.285       0.0       6.0                                

        IMAGE                NPIX     MEAN      STDDEV      MIN      MAX
HRCS_08_1999_02_2012.fits  16777216  13.896      23.053      0.0      1629.0                                

Max dose trend plots corrected for events that "pile-up" in the center of the taps due to bad position information.

Nov 2011	Aug 2011	May 2011	Feb 2011

Nov 2011	Aug 2011	May 2011	Feb 2011

TOP

Gratings

Focus

We plot the width of the zero order streak of ACIS/HETG observations and the width of the zero order image for HRC/LETG observations of point sources. No significant defocusing trend is seen at this time. See Gratings Focus pages.

TOP

PCAD

ACA Trending

ACA Trending - Entire Period

ACA Trending - FEB 2012

Gyro Bias Drift

ACIS-S and HRC Celestial Location Monitoring

Science Instrument Positional Change Monitoring

The following plots are the difference between coordinates obtained from Chandra observations and those obtained from existing catalogs vs time in day of mission.

The following steps are taken to generate these plots.

• all observations with grating are selected
• even if the observation is not grating one, if it is a known point source, it is added to the list.
• observed ra, jan, target ra, jan, nominal ra, jan and a ratio of a target elliptical to psf (psfratio are extracted from src fits files.
• the observations with psfratio smaller than 4 are selected
• the differences between observed coordinates and targeted coordinates (if not available nominal coordinates) are computed
• if the differences are larger than 6 arcsec, the points are dropped

The large dispersion around DOM ~ 2400 (Jan 2005) are all due to none grating Capella observations. Many observations are off-axis observations (e.g., obsid 6558).

TOP

Radiation History

Radiation Zone Timing

Plotted below are radiation zone timing plots based on the following definitions of radiation zone:

• RADZONE - Ephin levels (in any of the E1300,P4GM,P41GM channels) are more than 1/3 of RADMON safing thresholds.
• RADMON - Radmon is disabled for radiation zone (as commanded based on OFLS model, for comparison with actual radiation levels).
• PERIGEE - Time of closest earth approach (for comparison)

• Feb 2012 Timing Plots
• Entire Mission Timing Plots

Radiation Count Rates of Feb 2012

Sun Spot History

TOP

Trending

Quarterly Trends

• DEA/DPA Thermal

Previous Quarter
MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
DEAHK1	18.47	6.56	-4.264e+00	2.566e+02	C	DPA Thermistor 1 - BEP PC Board
DEAHK2	16.68	6.75	-4.682e+00	2.592e+02	C	DPA Thermistor 2 - BEP Oscillator
DEAHK3	16.65	8.09	-2.841e+00	2.771e+02	C	DPA Thermistor 3 - FEP 0 Mongoose
DEAHK4	15.96	7.56	-3.576e+00	2.855e+02	C	DPA Thermistor 4 - FEP 0 PC Board
DEAHK5	17.11	8.01	-4.163e+00	2.863e+02	C	DPA Thermistor 5 - FEP 0 ACTEL
DEAHK6	17.15	7.89	-4.327e+00	2.851e+02	C	DPA Thermistor 6 - FEP 0 RAM
DEAHK7	14.67	7.56	-4.917e+00	2.919e+02	C	DPA Thermistor 7 - FEP 0 Frame Buf.
DEAHK8	22.49	8.45	-7.596e+00	3.944e+02	C	DPA Thermistor 8 - FEP 1 Mongoose
DEAHK9	19.71	7.97	-6.334e+00	3.281e+02	C	DPA Thermistor 9 - FEP 1 PC Board
DEAHK10	21.90	8.53	-7.840e+00	4.038e+02	C	DPA Thermistor 10- FEP 1 ACTEL
DEAHK11	20.89	8.37	-7.189e+00	3.324e+02	C	DPA Thermistor 11- FEP 1 RAM
DEAHK12	16.33	7.93	-6.168e+00	3.164e+02	C	DPA Thermistor 12- FEP 1 Frame Buf.
DEAHK15	-248.61	0.18	-1.350e-01	-9.175e+00	C	Focal Plane Temp. Board 12
DEAHK16	-119.17	1.77	-2.187e+00	6.105e+01	C	Focal Plane Temp. Board 11



• HRC Thermal

Previous Quarter
MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
2CEAHVPT	297.51	2.64	-7.707e+00	-1.106e+02	K	CEA RADIATOR TEMPERATURE AT CENTER
2CHTRPZT	293.91	2.62	-7.797e+00	-7.129e+01	K	CENTRAL ELECTRONICS BOX TEMP
2CONDMXT	290.22	2.47	-7.847e+00	1.268e+02	K	CONDUIT -X FACE TEMPERATURE
2DCENTRT	290.02	2.67	-7.175e+00	-8.612e+01	K	DETECTOR HOUSING TEMP 2
2DTSTATT	290.73	2.34	-7.275e+00	7.426e+01	K	DETECTOR HOUSING TEMP 1
2FHTRMZT	292.80	2.30	-7.685e+00	2.152e+02	K	FRONT END ELECTRONICS BOX TEMPERATURE
2FRADPYT	288.58	2.24	-7.464e+00	2.784e+02	K	FRONT END ASSEMBLY +Y AT RADIATOR CENTER TEMP
2PMT1T	291.53	3.58	-8.773e+00	-1.186e+02	K	PMT 1 TEMPERATURE
2PMT2T	294.11	3.98	-1.022e+01	-8.026e+01	K	PMT 2 TEMPERATURE
2UVLSPXT	286.37	3.48	-7.258e+00	-2.161e+02	K	UV LIGHT SHIELD NEXT TO SNOUT TEMP



• SIM Thermal

Previous Quarter
MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
3TSMXCET	224.98	31.42	1.262e-01	-1.284e-13	K	-X TURTLE SHELL NR HRC CEA
3TSMXSPT	265.84	29.90	2.369e+00	-2.485e-13	K	-X TURTLE SHELL NR ACIS SS
3TTHRC1T	270.64	15.22	-2.893e+01	1.772e-12	K	TT AT HRC BIPOD ATTACH #1
3TTHRC2T	275.59	14.69	-3.022e+01	1.529e-11	K	TT AT HRC BIPOD ATTACH #2



• OBA Heaters

Previous Quarter
MSID	MEAN	RMS	DELTA/YR	DELTA/YR/YR	UNITS	DESCRIPTION
OOBTHR08	290.58	1.12	1.049e+00	-5.078e+01	K	RT 31: OBA CONE
OOBTHR18	289.82	1.09	1.084e+00	-4.766e+01	K	RT 40: OBA CONE
OOBTHR22	289.04	1.69	2.083e+00	-4.559e+01	K	RT 44: OBA CONE
OOBTHR24	288.95	1.68	2.074e+00	-4.489e+01	K	RT 46: OBA CONE
OOBTHR56	296.86	1.41	-9.794e-01	-5.897e+01	K	RT 158: OBA CONE
OOBTHR60	290.66	1.83	2.268e+00	-5.007e+01	K	RT 153: OBA CONE

TOP

Spacecraft Motions

Reaction Wheel Rotations

Note: From Feb 2010, the computation of reaction wheel rotations are slightly modified.

TOP

Links to Past Monthly Reports

Year	Month
1999							Jul	Aug	Sep	Oct	Nov	Dec
2000	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2001	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2002	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2003	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2004	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2005	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2006	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2007	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2008	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2009	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2010	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2011	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
2012	Jan

Back to SOT page