- M&TA MONTHLY REPORTS -

1. ACIS
   1. DOSE
   2. CTI
   3. Focal Plane Temperature
   4. Bad Pixels
   5. Background
   6. FEP - Operational change
2. HRC -DOSE
3. GRATINGS - FOCUS
4. ACA
5. Spacecraft Motions
6. Radiation Report

• ACIS
  • ACIS DOSE registered-photon-map
    • NOV registered-photon-map in fits
      

      Statistics:
      #                IMAGE        NPIX      MEAN          RMS              MIN    MAX
        ACIS_nov01_total.fits     6004901    5.905         14.294            0.0    14331.0
      
       ACIS_nov01_total I2 Node 0  262654  5.332285        4.630499           0.0   175.0
       ACIS_nov01_total I2 Node 1  262654  6.409459        8.562094           0.0   303.0
       ACIS_nov01_total I2 Node 2  262654  7.448263        13.059591          0.0   404.0
       ACIS_nov01_total I2 Node 3  262654  8.156453        17.050854          0.0   506.0
      
       ACIS_nov01_total I3 Node 0  262654  8.495412        17.983638          0.0   502.0
       ACIS_nov01_total I3 Node 1  262654  7.650540        13.657848          0.0   545.0
       ACIS_nov01_total I3 Node 2  262654  6.488144        9.005573           0.0   312.0
       ACIS_nov01_total I3 Node 3  262654  5.238881        4.496267           0.0   174.0
      
       ACIS_nov01_total S2 Node 0  262397  6.106297        51.337795          0.0  14331.0
       ACIS_nov01_total S2 Node 1  262397  6.899862        14.868258          0.0   303.0
       ACIS_nov01_total S2 Node 2  262397  6.112642        7.455193           0.0  3469.0
       ACIS_nov01_total S2 Node 3  262397  5.837445        2.702221           0.0    37.0
      
       ACIS_nov01_total S3 Node 0  262397  10.835135       3.859614           0.0    82.0
       ACIS_nov01_total S3 Node 1  262397  12.967328       6.325135           0.0    69.0
       ACIS_nov01_total S3 Node 2  262397  13.115421       5.178487           0.0    79.0
       ACIS_nov01_total S3 Node 3  262397  10.972130       4.054595           0.0   180.0
      
      

    • Jul 1999 - Nov 2001 registered-photon-map in fits
      

      
      Statistics:
      #                IMAGE        NPIX      MEAN          RMS              MIN    MAX
       ACIS_total.fits            6004901   255.59         474.17            0.0   404123.0
      
       ACIS_total       I2 node 0  262654  152.545234      122.420427        40.0  9330.0
       ACIS_total       I2 node 1  262654  182.112490      256.131781       100.0  8275.0
       ACIS_total       I2 node 2  262654  207.903596      394.983931       108.0  11559.0
       ACIS_total       I2 node 3  262654  224.642678      523.162252         0.0  14302.0
      
       ACIS_total       I3 node 0  262654  241.704063      517.203810       125.0  13943.0
       ACIS_total       I3 node 1  262654  221.836682      385.335458       123.0  11030.0
       ACIS_total       I3 node 2  262654  186.509469      249.251098        46.0  8038.0
       ACIS_total       I3 node 3  262654  150.166622      109.904024         0.0  4453.0
      
       ACIS_total       S2 node 0  262397  306.411102      335.725447       104.0  51434.0
       ACIS_total       S2 node 1  262397  387.438473      986.476460       114.0  19302.0
       ACIS_total       S2 node 2  262397  349.740957      257.077932       139.0  126052.0
       ACIS_total       S2 node 3  262397  341.492361      75.415179          0.0   757.0
      
       ACIS_total       S3 node 0  262397  689.531062      613.759180       174.0  4575.0
       ACIS_total       S3 node 1  262397  826.884080      673.787660         0.0  69416.0
       ACIS_total       S3 node 2  262397  560.522685      139.472073       170.0  3212.0
       ACIS_total       S3 node 3  262397  495.080557      134.206874         0.0  2968.0
      
      

    • NOV 2001 dose GIF image
      
    • NOV I3 dose GIF image
      
    • NOV S3 dose GIF image
      
    • TOTAL JUL 1999 - NOV 2001 dose GIF image
      
    • TOTAL I3 dose GIF image
      
    • TOTAL S3 dose GIF image
      
    
    
  • The Mean CTI

    Observations with cold radiator temperature deviation larger than 0.5 C
    from the nominal value of -127.92905 C are dropped (after DOM 200).
    
    
    Mean CTI observed when FPT~ -119 C and no testing modes (Squeegy, cuckoo, etc.) (average of 4 nodes per chip).
    CTI's are computed for Mn K alpha, and defined as slope/intercept x10^4 of row # vs ADU.
    Data file here
    

    
    
    CTI Slope (after DOM 200)

    
    CTI slopes were computed for data point after DOM 200 and inside of 1 sigma deviation.
    Using only data point in 1 sigma range, we drop high temperature observations, squeegy
    observations, and other outliers. A independent variable is date, and a dependent 
    variable is CTI.
    
    Note: Unit is cti/day from this month report. 
    
    Front Side Illuminated S Array
    
    	Node 0		Node 1		Node 2		Node 3
    
    CCD4	1.415e-8        1.797e-8        1.848e-8        1.645e-8
    CCD6	1.406e-8        1.700e-8        1.607e-8        1.498e-8
    CCD8	1.257e-8        1.306e-8        1.273e-8        1.171e-8
    CCD9	1.298e-8        1.632e-8        1.496e-8        1.102e-8
    
    AVG	1.264e-8
    
    
    Front Side Illuminated I Array
    
    	Node 0		Node 1		Node 2		Node 3
    
    CCD0	1.288e-8        1.724e-8        1.706e-8        1.451e-8
    CCD1	1.367e-8        1.570e-8        1.620e-8        1.245e-8
    CCD2	1.406e-8        1.643e-8        1.630e-8        1.269e-8
    CCD3	1.299e-8        1.536e-8        1.484e-8        1.373e-8
    
    AVG	1.336e-8
    Detrended AVG 1.246e-8
    
    Back Side Illuminated S Array
    
    	Node 0		Node 1		Node 2		Node 3
    
    CCD5	5.414e-9      6.310e-9        6.508e-9         2.852e-9
    AVG:	4.930e-9
    
    CCD7	3.138e-9       4.633e-9        4.813e-9        3.075e-9
    AVG	3.979e-9
    
    

  • Focal Plane Temperature

      
           The Mean (max) FPT: -118.06      std dev: 1.22
                   mean width:    0.32      std dev: 0.11 
    

    DOY	Focal Temp	S.D.
    306.92	-118.58	0.32
    309.49	-118.41	0.24
    312.02	-118.90	0.23
    314.41	-119.22	0.16
    314.86	-117.93	0.48
    317.48	-117.61	0.38
    320.09	-118.25	0.31
    325.39	-114.86	0.51
    328.05	-118.74	0.26

    
    

    New Plots!

    From this month, 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.
    

  • Bad Pixel Candidates

    The following pixels consistently showed a bias level more than 5 sigma away the chip's mean level during this period.

    	CCD0	CCD2	CCD3	CCD4	CCD5	CCD6	CCD7	CCD8
    New for This Month			(811,637)
    Previously Reported Warm Pixels		(526,66)		(247,364)	(1-3,775-1022) (226,565) (232-245,313) (510-511,775-1022) (512,775) (513,776-1024) (607,281) (1022,166)	(360,249) (766,501)	(1-3, 1-1024) (510-515,775-1024) (1022,775)	(64,482) (587,544)
    Previously Reported - Healed ?		(483,816)						(453,1)
    Flickering ?	(995,200)				(509,spurious rows)	(360,249)	(4,spurious rows) (509,spurious rows) (516,spurious rows)

    Hot Pixels - No new hot pixels observed this month.
    Previously reported:
    Pixel 1022,166 of Quad 4 CCD 5. We define a hot pixel as a pixel with the count rate 1000 counts above the average

    Bad Pixel Report Page
    

  • Acis Count Rate Plot
    This monitors the ACIS count Rate vs. EPHIN count Rate.
    No sources are removed. For daily updates see: Ephin/Acis Info
  
  
  • FEP operational Change

    From: Royce Buehler 
    Subject: FEP Power cycling commands
    
    Here are the specifics on the changes we've just made to add FEP power 
    cycling to the ACIS tables. Dan, let me know who else to forward this
    to.
    
    What was changed:
      Every science run which actually calls for a bias, and which
      previously called out a WSVIDALLDN command.
    
    What was not changed:
      Science runs which do not actually call for a bias. (This includes
      configurations like TN_00156B, which do not call for a bias although
      the offline system thinks they do.  Such exceptional simodes all begin with
      TN or CN.)
    
      Science runs which did not previously call out a WSVIDALLDN command.
      There were around 150 of these, all archaic. The parameter
      generation system can no longer assign any of these to an observation.
    
    What exactly changed:
    
      The command WSVIDALLDN, followed by a delay of 18 seconds on orbit,
      was replaced by the 3 commands
    
      AA00000000  (stop science) followed by 4 second delay
      AA00000000     "     "      "          "
      WSPOW00000 (power down all feps and video boards) 
    		followed by a 24 second delay.
    
    The next command in all of these science runs is a WSPOW
    which tells the BEP to power up all FEPs and the specific video 
    boards needed for the run. We had a premonition long ago that we wouldn't
    always be certain of having juice to the FEPs at the start of a
    science runt, so we decided to explicitly power on the FEPs and to
    provide sufficient following delay (63 seconds) to power up six video
    boards, and six FEPs, and to load all the FEPs.  Consequently, there
    was no need to adjust this or any of the remaining commands.
    
    Next week, we'll be saving ourselves 27 seconds of science on each
    bias run by moving the two dump commands (dump sys config and dump 
    Huffman tables) to run after the start science command.
    

    
    
• HRC
  DOSE of central 4K pore-pairs
  DOSE is now calculated in RAW coordinates instead of DET.
  • NOV HRC-I dose fits image
    

            IMAGE                NPIX      MEAN    STDDEV      MIN       MAX
    HRCI_11_2001.fits          16777216  0.01685   0.13099     0.0       6.0 
    

    
    
  • SEP 1999 - NOV 2001 HRC-I dose fits image
    

            IMAGE                NPIX      MEAN    STDDEV      MIN       MAX
    HRCI_08_1999_11_2001.fits  16777216  1.22396   3.18807     0.0        462.0
    

    
    
  • :NOV HRC-S dose fits image
    

            IMAGE                NPIX      MEAN    STDDEV      MIN       MAX
    HRCS_11_2001.fits          16777216  0.05182   0.31624     0.0        37.0
    

    
    
  • AUG 1999 - NOV 2001 HRC-S dose fits image
    

            IMAGE                NPIX      MEAN     STDDEV      MIN      MAX
    HRCS_08_1999_11_2001.fits  16777216  4.10397   10.34303     0.0      1815.0
    
    

  • NOV HRC-I dose PNG image
    
  • AUG 1999 - NOV 2001 HRC-I dose PNG image
    
  • NOV HRC-S dose PNG image
    
  • AUG 1999 - NOV 2001 HRC-S dose PNG image
    
  
  
• 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.
  
  

  
  
  
  
• ACA

  ACA Trending
  

  
  
• Spacecraft Motions

  NOV01

  Motion	Monthly total	Annual Total	Mission Total	Monthly Delta
  		Nov00 thru Nov01	Jul99 thru Nov01	current - previous
  SIM
  SIM FA (STEPS)	8488.00	63806.0	229239.	4848.00
  SIM TSC (STEPS)	5.43387e+06	5.91151e+07	1.32925e+08	1.42224e+06
  SIM TSC (# Moves)	46	484	1185	19
  mean SIM TSC at ACIS-I/sdev/# obs	92903.0/ 0.00000/ 7	92903.0/ 0.00000/ 77	92968.4/ 266.077/ 203	0.00000/ 3
  mean SIM TSC at ACIS-S/sdev/# obs	75473.4/ 409.854/ 16	75413.3/ 476.600/ 160	75427.6/ 457.953/ 405	-150.117/ 7
  mean SIM TSC at HRC-I/sdev/# obs	-50504.0/ 0.00000/ 1	-50504.3/ 0.690410/ 25	-50504.5/ 0.621535/ 75	0.500000/ -1
  mean SIM TSC at HRC-S/sdev/# obs	-99615.9/ 0.363137/ 14	-99621.2/ 45.2743/ 149	-99614.3/ 58.6464/ 328	0.0312500/ 5
  GRATINGS
  No. HETG insertions	2.00000	35.0000	100.000	0.00000
  No. LETG insertions	4.00000	21.0000	65.0000	2.00000
  mean HETG inserted angles/sdev (A)	6.33750/ 0.00000	6.34821/ 0.00401785	6.71250/ 0.428978	0.00000
  mean HETG inserted angles/sdev (B)	6.33750/ 0.00000	6.33750/ 0.00000	6.48230/ 0.143354	0.00000
  mean LETG inserted angles/sdev (A)	7.08750/ 0.00000	7.18125/ 0.0277549	8.67841/ 6.56852	0.00000
  mean LETG inserted angles/sdev (B)	4.46250/ 0.00000	5.19464/ 11.2567	4.57383/ 0.0566057	0.00000
  mean HETG retracted angles/sdev (A)	79.8375/ 0.00000	79.8482/ 0.00401786	80.5237/ 0.687656	0.00000
  mean HETG retracted angles/sdev (B)	80.5875/ 0.00000	80.6089/ 0.00779937	81.1407/ 0.589484	0.00000
  mean LETG retracted angles/sdev (A)	79.0875/ 0.00000	79.2482/ 0.0361607	80.3624/ 2.44248	0.00000
  mean LETG retracted angles/sdev (B)	78.3375/ 0.00000	78.4268/ 0.0267857	79.1048/ 0.753359	0.00000
  Reaction Wheel Rotations		Past 12 Months	Jan00 thru current
  AORWDAY1	6.50341e+07	9.65357e+08	1.83934e+09	-1.73500e+07
  AORWDAY2	7.60810e+07	9.53524e+08	1.80955e+09	-1.27631e+07
  AORWDAY3	5.79744e+07	1.03597e+09	1.96097e+09	-4.40048e+07
  AORWDAY4	7.00865e+07	9.72498e+08	1.85409e+09	-8.72968e+06
  AORWDAY5	7.10277e+07	9.46432e+08	1.79712e+09	-2.13856e+07
  AORWDAY6	6.29508e+07	1.04169e+09	1.96460e+09	-3.53428e+07

  
  

  Radiation Report.

  Since September 24, space weather forced 7 radiation-protection actions --- 4 autonomous and 3 commanded. All recoveries proceeded nominally. A total of about 1106 Ksec of scheduled science observing time has been lost due to radiation triggered (autonomous or manual) activations of SCS 107.

  • Auto-SCS107 @ 267 (Sep24); resume @ 273 (Sep30). [X2.5, S4]
  • Auto-SCS107 @ 275 (Oct02); resume @ 276 (Oct03). [M8, S3]
  • Com-SCS107 @ 294 (Oct21); resume @ 296 (Oct23). [X1.6 & X1.6, S1]
  • Com-SCS107 @ 298 (Oct25); resume @ 300 (Oct27). [X1.4, S0]
  • Auto-SCS107 @ 308 (Nov04); resume @ 312 (Nov08). [X1.0, S4]
  • Com-SCS107 @ 324 (Nov20); resume @ 325 (Nov21). [M2.8, S1]
  • Auto-SCS107 @ 327 (Nov23); resume @ 329 (Nov25). [X1.0, S4]

  The most recent solar-proton storm reached severe (S4) levels. This is the 7th >=S3 event of this solar cycle and the 4th since September 24, of 7 expected for the solar cycle.

  Rate of increase of the ACIS CCD CTI continues to fall within allocation. MIT/ Catherine Grant's most recent analysis (data through Nov 18 and consistent with SOT analysis through Nov 29) gives the following:

  • FI: 4.7*10^-6 dCTI/y (3.7%/y)
  • BI: 1.45*10^-6 dCTI/y (9.9%/y)

  There is a natural desire to reduce this rate, especially to minimize the amount of gain re-calibration. After some initial discussions, the CXC SOT is examining quantitatively the potential benefits of scheduling the HRC or gratings during periods of high geomagnetic vulnerability.

  SvT has completed software for generating the next Chandra Radiation Model database. This version incorporates Polar data with the Geotail data, to interpolate better the proton fluxes at high GSM latitudes, where Chandra spends much of its time. The database will be interchangeable with the existing one and contains version identifiers for CXC configuration management. SvT is currently exercising software to generate CRM database. We expect that SvT will complete populating the database by the end of 2002 January.

  * This memo was originally sent out on Fri, 30 Nov 2001 16:43:18 by Steve O'Dell

  ---

  Previous Months

  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

Back to SOT page