MTA Monitoring Report 09/21/01 - 09/27/01

A powerful X-class solar flare erupted Monday morning, Sept. 24th, EPHIN triggered almost immediatly. Observations were suspended at: TIME=2001:269:22:30. The environment has yet to clear on day 271. Current restart projected for day 230 at 1 a.m.

ACIS/Radiation Environment correlations
Note the background rise, just before the observation cut-off, on DOM 795.

CTI Trend

Average of ACIS-I CCDs (MnKa) slope 1.419e-8 CTI/day
Detrended slope 1.324e-8 CTI/day

ACIS Warm Pixels

The following pixels consistently showed a bias level more than 5 sigma away the chip's mean level during this period.
For more information see the link above and MTA monthly reports.

	CCD2	CCD4	CCD5	CCD6	CCD7	CCD8
New this week
Previously reported - still observed	(526,66)		(1-3,775-1024) (226,565) (232-245, 313) (509, spurious rows) (510-511,775-1024) (512,775) (513,776-1024) (607,281) (1022,166)	(766,501)	(1-3,1-1024) (4,spurious rows) (509, spurious rows) (510-515,775-1024) (516,spurious rows) (1022,775)	(62,482) (587,544)
Previously reported - not observed during this period		(247,364)		(360,249)

ACIS Focal Temperature

For this period, 2 peaks were observed.

Day (DOY)	Temp (C)	Width (Days)
264.54	-117.12	0.29
267.14	-117.61	0.25

MTA Problem Tracking

Note: Problem Tracking system is currently not working properly. Many problems reported are not listed on the table.

SIM Movements

7 TSC moves this period
weekly average time/step 0.00151 s
mission average time/step 0.00136 s

Telemetry

9/21

FAMTRTEMP

yellow

TSCIUSF1

red

TSCIUSF8

yellow

9/22
This morning (22 Sept) Chandra entered a bright star hold at 7:48am (265/11+48) following a 2.5 hour observation of the dark moon performed on gyro-hold. Analysis of the dump data indicates that a gyro bias error of ~170 arcsec accumulated during the gyro hold and subsequent maneuver. The error exceeded the size of the aspect camera search box during the next star acquisition and resulted in the bright star hold. Data indicates that the gyro performance is consistent with past performance, however some further data analysis will be performed by the gyro vendor.

1DPPWRB

red

FAMTRTEMP

yellow

9/23

1DPPWRB

red

FAMTRTEMP

yellow

TSCIUSF1

red

TSCIUSF8

red

9/24

1DPPWRB

red

FAMTRTEMP

yellow

TSCIUSF1

red

TSCIUSF8

red

TPZLGABM

yellow

9/25

1DPPWRB

red

FAMTRTEMP

yellow

TSCIUSF1

red

TSCIUSF8

red

TPZLGABM

yellow

9/26

1DPPWRB

red

FAMTRTEMP

yellow

TSCIUSF1

red

TSCIUSF8

red

TPZLGABM

yellow

9/27

1DPPWRB

red

FAMTRTEMP

yellow

TSCIUSF1

red

TSCIUSF8

red

TPZLGABM

yellow

Recent Observations

The ACA Problem is in the specified handling of guide star positional errors.
This issue in not significant to the final product and so is being worked at low priority.

OBSID	DETECTOR	GRATING	TARGET	ANALYSIS	ACA
1890	ACIS-S	HETG	HD93497	OK /NOT AVIL	PROBLEM
1883	ACIS-I	NONE	MWC297	OK	OK
1914	ACIS-S	NONE	SAXJ1752.3-3138	OK	OK
2119	ACIS-S	NONE	1WGA_J1233.3+6910	OK	MISSING

MSID	DESCRIPTION	COMMENTS
HCAPGRD1	RT100-RT101: HRMA CAP circum	flat @ 0.1
HCAPGRD2	RT100-RT104: HRMA CAP ridial	flat around 0.05
HCAPGRD3	RT101-RT102: HRMA CAP circum	flat around -0.05
HCAPGRD4	RT101-RT104: HRMA CAP ridial	flat around -0.05
HCAPGRD5	RT102-RT103: HRMA CAP circum	flat @ 0.12
HCAPGRD6	RT102-RT105: HRMA CAP ridial	flat @ -0.11
HCAPGRD7	RT103-RT101: HRMA CAP circum	flat around -0.05
HCAPGRD8	RT103-RT106: HRMA CAP ridial	flat around -0.10

HRMA Fap

MSID	DESCRIPTION	COMMENTS
HFAPGRD1	RT1-RT2: HRMA Forward Aperture Plate	flat around -0.02
HFAPGRD2	RT1-RT4: HRMA Forward Aperture Plate	flat around 0.05
HFAPGRD3	RT2-RT3: HRMA Forward Aperture Plate	flat around 0.05
HFAPGRD4	RT2-RT5: HRMA Forward Aperture Plate	flat around 0.08
HFAPGRD5	RT3-RT1: HRMA Forward Aperture Plate	flat around -0.04
HFAPGRD6	RT3-RT6: HRMA Forward Aperture Plate	flat around 0.01
HFAPGRD7	RT4-RT5: HRMA Forward Aperture Plate	flat around 0.02
HFAPGRD8	RT5-RT6: HRMA Forward Aperture Plate	flat around -0.03
HFAPGRD9	RT6-RT4: HRMA Forward Aperture Plate	flat around 0.0

HRMA Aft Heater Plate

MSID	DESCRIPTION	COMMENTS
HAHEATGRD1	RT11-RT12: HRMA Aft Heater Plate circum	flat around -0.02
HAHEATGRD2	RT12-RT13: HRMA Aft Heater Plate circum	flat around 0.02
HAHEATGRD3	RT13-RT11: HRMA Aft Heater Plate circum	flat around -0.02

HRMA H-Flexure

MSID	DESCRIPTION	COMMENTS
HHFLXGRD1	RT113-RT114: HRMA H-Flexure circum	flat around -0.11
HHFLXGRD2	RT113-RT115: HRMA H-Flexure ridial	flat around -0.04
HHFLXGRD3	RT114-RT116: HRMA H-Flexure circum	flat around -0.04
HHFLXGRD4	RT115-RT116: HRMA H-Flexure circum	flat around -0.14
HHFLXGRD5	RT115-RT117: HRMA H-Flexure ridial	flat around -0.01 to -0.02
HHFLXGRD6	RT116-RT117: HRMA H-Flexure circum	flat around 0.11 to to 0.12
HHFLXGRD7	RT117-RT118: HRMA H-Flexure circum	flat around -0.11
HHFLXGRD8	RT117-RT113: HRMA H-Flexure ridial	flat around 0.04
HHFLXGRD9	RT118-Rt114: HRMA H-Flexure circum	flat around 0.03

HRMA P-Flexure

MSID	DESCRIPTION	COMMENTS
HPFLXGRD1	RT107-RT108: HRMA P-Flexure circum	flat around -0.04
HPFLXGRD2	RT107-RT109: HRMA P-Flexure ridial	flat around -0.04
HPFLXGRD3	RT108-RT110: HRMA P-Flexure circum	flat around 0.09
HPFLXGRD4	RT109-RT110: HRMA P-Flexure circum	flat around 0.08
HPFLXGRD5	RT109-RT111: HRMA P-Flexure circum	flat around -0.05
HPFLXGRD6	RT110-Rt112: HRMA P-Flexure ridial	flat around -0.08
HPFLXGRD7	RT111-RT112: HRMA P-Flexure circum	flat around 0.06, small scattering
HPFLXGRD8	RT111-RT107: HRMA P-Flexure ridial	flat around 0.07
HPFLXGRD9	RT112-RT108: HRMA P-Flexure circum	flat around -0.01

HRMA PreCol Baffle Plate

MSID DESCRIPTION COMMENTS

HPCOLBGRD1 RT8-RT9: HRMA Precollimator Baffle flat around -0.05
HPCOLBGRD2 RT9-RT10: HRMA Precollimator Baffle flat around 0.0

MSID	DESCRIPTION	COMMENTS
HPCOLBGRD1	RT8-RT9: HRMA Precollimator Baffle	flat around -0.05
HPCOLBGRD2	RT9-RT10: HRMA Precollimator Baffle	flat around 0.0

HRMA Struts

MSID	DESCRIPTION	COMMENTS
*HSTRTGRD1	RT25-RT26: HRMA STRUTS	downward trend until ~DOM 540, flatter now around -2.40, large dispersion ~DOM 700
*HSTRTGRD2	RT26-RT27: HRMA STRUTS	downward trend, -1.0 to -1.6, scattering back down to -1.2
*HSTRTGRD3	RT27-RT28: HRMA STRUTS	scattered between -0.4 and -0.2, slight upward trend since ~DOM 575
*HSTRTGRD4	RT28-RT29: HRMA STRUTS	upward trend, 0.6 to 1.4,stopped, but scattering wider
*HSTRTGRD5	RT29-RT30: HRMA STRUTS	upward trend, 1.6 to 1.75, slight downward trend since ~DOM 575
HSTRTGRD6	RT30-RT25: HRMA STRUTS	scattered between 1.1 and 1.2

HSA Outer Cylinder

MSID	DESCRIPTION	COMMENTS
HOCYLGRD1	RT14-RT19: HSA Outer Cylinder	flat around 0.07
HOCYLGRD2	RT19-RT16: HSA Outer Cylinder	flat around -0.01
HOCYLGRD3	RT16-RT18: HSA Outer Cylinder	flat around -0.04
HOCYLGRD4	RT18-RT15: HSA Outer Cylinder	flat around 0.02
HOCYLGRD5	RT15-RT17: HSA Outer Cylinder	flat around 0.02
HOCYLGRD6	RT17-RT14: HSA Outer Cylinder	flat around -0.05

OBA AFT Inner Cylinder

MSID DESCRIPTION COMMENTS

HAICYLGRD RT23-RT24: HSA Aft Inner Cylinder flat around -0.01

MSID	DESCRIPTION	COMMENTS
HAICYLGRD	RT23-RT24: HSA Aft Inner Cylinder	flat around -0.01

OBA AFT Bulkhead

MSID	DESCRIPTION	COMMENTS
HAFTBGRD1	RT53-RT54: OBA AFT Bulkhead	scattered between 0 and 4, slight upward trend
HAFTBGRD2	RT54-RT55: OBA AFT Bulkhead	scattered between -0.2 and 0.7
HAFTBGRD3	RT55-RT53: OBA AFT Bulkhead	scattered between -3.5 and 0.0, slight down ward trend

OBA Cone

MSID	DESCRIPTION	COMMENTS
HCONEGRD1	RT31-RT32: OBA Cone Panel	scattered between 0.0 and 0.1
HCONEGRD2	RT31-RT41: OBA Cone Panel	scattered between 0.5 and 0.7
HCONEGRD3	RT32-RT33: OBA Cone Panel	scattered between 0.3 and 0.65
*HCONEGRD4	RT32-RT42: OBA Cone Panel	scattered betwe en 0.5 and 0.8, slight upward trend, slightly downward since ~DOM 550
HCONEGRD5	RT33-RT34: OBA Cone Panel	scattered between 0.4 and 0.65, slight upward trend
HCONEGRD6	RT33-RT43: OBA Cone Panel	scattered between 0.5 and 0.8, slightly upward trend
*HCONEGRD7	RT34-RT35: OBA Cone Panel	scattered between -0.6 and -0.3, slightly upward trend then downward trend since ~DOM 550
HCONEGRD8	RT34-RT43: OBA Cone Panel	scattered between 0.1 and 0.3
HCONEGRD9	RT35-RT36: OBA Cone Panel	scattered between 0.6 and 0.7
HCONEGRD10	RT35-RT44: OBA Cone Panel	scattered between 0.65 and 0.85
HCONEGRD11	RT36-RT37: OBA Cone Panel	scattered between -0.70 and -0.60
HCONEGRD12	RT36-RT45: OBA Cone Panel	around 0.05
*HCONEGRD13	RT37-RT38: OBA Cone Panel	scattered betwe en 0.0 and 0.4, slightly downward trend
HCONEGRD14	RT37-RT45: OBA Cone Panel	scattered between 0.70 and 0.75
HCONEGRD15	RT38-RT39: OBA Cone Panel	scattered between -0.30 and -0.10
HCONEGRD16	RT38-RT46: OBA Cone Panel	scattered between 0.4 and 0.8
HCONDGRD17	RT39-RT40: OBA Cone Panel	scattered between -0.5 and -0.2
HCONEGRD18	RT39-RT46: OBA Cone Panel	scattered between 0.6 and 1.0
HCONEGRD19	RT40-RT31: OBA Cone Panel	scattered between -0.15 and -0.06
*HCONEGRD20	RT40-RT47: OBA Cone Panel	scattered betwe en 0.4 and 0.7, slightly upward trend
HCONEGRD21	RT41-RT42: OBA Cone Panel	scattered between 0.05 and 0.20
HCONEGRD22	RT41-RT48: OBA Cone Panel	scattered between -0.2 and 0.1
HCONEGRD23	RT42-RT43: OBA Cone Panel	scattered between 0.4 and 0.6
HCONEGRD24	RT42-RT49: OBA Cone Panel	scattered between -0.1 and 0.2
HCONEGRD25	RT43-RT44: OBA Cone Panel	scattered between 0.0 and 0.2
HCONEGRD26	RT43-RT49: OBA Cone Panel	scattered between -0.7 and -0.10
HCONEGRD27	RT44-RT45: OBA Cone Panel	scattered between -0.1 and 0.0
HCONEGRD28	RT44-RT50: OBA Cone Panel	scattered between -0.15 and 0.05
HCONEGRD29	RT45-RT46: OBA Cone Panel	scattered between 0.0 and 0.1
HCONEGRD30	RT45-RT51: OBA Cone Panel	around -0.02
HCONEGRD31	RT46-RT47: OBA Cone Panel	scattered between -1.0 and -0.2
HCONEGRD32	RT46-RT52: OBA Cone Panel	scattered between -0.8 and -0.2
HCONEGRD33	RT47-RT41: OBA Cone Panel	scattered between -0.08 and 0.03
HCONEGRD34	RT47-RT52: OBA Cone Panel	scattered between 0.0 and 0.3
HCONEGRD35	RT48-RT49: OBA Cone Panel	scattered between 0.1 and 0.4
HCONEGRD36	RT48-RT53: OBA Cone Panel	scattered between -3 and 1
HCONEGRD37	RT49-RT50: OBA Cone Panel	scattered between 0.1 and 0.7
HCONEGRD38	RT49-RT55: OBA Cone Panel	scattered between 0.4 and 1.2
HCONEGRD39	RT50-RT51: OBA Cone Panel	scattered between -0.1 and 0.15
HCONEGRD40	RT50-RT55: OBA Cone Panel	scattered between 0.0 and 0.8
HCONEGRD41	RT51-RT52: OBA Cone Panel	scattered between -0.7 and -0.2
HCONEGRD42	RT51-RT54: OBA Cone Panel	scattered between -0.05 and 0.10
HCONEGRD43	RT52-RT48: OBA Cone Panel	scattered between -0.40 and 0.0
HCONEGRD44	RT52-RT53: OBA Cone Panel	scattered between -2.5 and 0.5

OBA Fwd Bulkhead

MSID	DESCRIPTION	COMMENTS
HFRDBGRD1	RT700-RT701: OBA Forward Bulkhead	scattered between 0.9 and 1.3
HFRDBGRD2	RT701-RT702: OBA Forward Bulkhead	scattered between 0.0 and 0.3
HFRDBGRD3	RT702-RT703: OBA Forward Bulkhead	scattered between 0.0 and 0.3
HFRDBGRD4	RT703-RT704: OBA Forward Bulkhead	scattered between -0.3 and 0.0
HFRDBGRD5	RT704-RT156: OBA Forward Bulkhead	scattered between 3.7 and 4.1
HFRDBGRD7	RT705-RT706: OBA Forward Bulkhead	around 1.3, with some scatter
HFRDBGRD8	RT706-RT155: OBA Forward Bulkhead	around -3.53
HFRDBGRD10	RT707-RT708: OBA Forward Bulkhead	scattered between -0.3 and 0.0
HFRDBGRD11	RT708-RT709: OBA Forward Bulkhead	scattered between -1.3 and -0.9
HFRDBGRD12	RT709-RT710: OBA Forward Bulkhead	scattered between -0.6 and -0.3
HFRDBGRD13	RT710-RT711: OBA Forward Bulkhead	scattered between -0.3 and 0.0
HFRDBGRD14	RT711-RT700: OBA Forward Bulkhead	scattered between -1.25 and -0.90

Periscope

MSID DESCRIPTION COMMENTS

HPRIGRD RT133-RT134: Periscope scattered 0.98 and 1.05

MSID	DESCRIPTION	COMMENTS
HPRIGRD	RT133-RT134: Periscope	scattered 0.98 and 1.05

Spacecraft Struts

MSID	DESCRIPTION	COMMENTS
HSSTRTGRD1	RT75-RT76: Spacecraft Struts	around -0.9/-1.0
HSSTRTGRD2	RT76-RT77: Spacecraft Struts	scattered between -2.0 and 0.0
HSSTRTGRD3	RT77-RT78: Spacecraft Struts	scattered between -0.8 and 0.15
HSSTRTGRD4	RT78-RT79: Spacecraft Struts	scattered between 0.0 and 2.5, upward trend
HSSTRTGRD5	RT79-RT80: Spacecraft Struts	around 0.11
HSSTRTGRD6	RT80-RT75: Spacecraft Struts	around 0.0

TFTE

MSID	DESCRIPTION	COMMENTS
HTFTEGRD1	RT58-RT59: TFTE Forward Cylinder	around 0.14
HTFTEGRD2	RT59-RT60: TFTE Forward Cylinder	around -0.03
HTFTEGRD3	RT60-RT58: TFTE Forward Cylinder	around -0.15
*HTFTEGRD4	RT61-RT62: TFTE Cone	upward trend, between 0.6 and 1.2
*HTFTEGRD5	RT62-RT63: TFTE Cone	upward trend, between 0.5 and 0.9
*HTFFEGRD6	RT63-RT61: TFTE Cone	downward trend, between -2.0 and -1.0
*HTFFEGRD7	RT64-RT65: TFTE Cover	around 5.8
*HTFTEGRD8	RT65-RT66: TFTE Cover	downward trend, between -26.8 and -25.6
HTFTEGRD9	RT66-RT67: TFTE Cover	scattered between -2.4 and -1.6
*HTFTEGRD10	RT67-RT68: TFTE Cover	scattered between 1.8 and 2.4 upward trend
*HTFTEGRD11	RT68-RT69: TFTE Cover	scattered between 25.8 and 26.8, upward trend
HTFTEGRD12	RT69-RT64: TFTE Cover	scattered between -5.9 and -5.65