chandra users’ committee cxc manager’s status report for the period may 2010 – october 2010...

Chandra Users’ Committee

CXC Manager’s Status ReportFor the period May 2010 – October 2010

Roger BrissendenCXC Manager

25 October 2010

25 October 2010 CXC Status Report/CUC

Topics

• Program Level Status– Program Management

– Spacecraft

– Science Instruments and Calibration

– Mission Planning

– OCC

– Data Processing

– CXCDS

– Chandra Director’s Office

– Education and Public Outreach

• Mission Metrics

• Chandra Grant Awards


Top Level Summary

• Spacecraft and instruments are performing superbly

• NASA Senior Review selected Chandra proposal second of 11 operating missions with a score of 9.5 out of 10

“After a decade in operation, Chandra remains an immensely powerful observatory in its prime, and it is well managed.”

“The SRC recommends that Chandra be extended with an augmentation with respect to the FY2011 President’s budget and at the in-guide level for FY2012 and beyond. A planned tool for subpixel resolution in standard pipeline processing, user analysis tools, and full archive reprocessing planned for FY2012 should be completed. The SRC recommends restoration of funds sufficient for that purpose in FY2011, recognizing that the recommended level falls short of the in-guide numbers.”


Program Level Status – CXC Organization

Education & OutreachLestition

Director's OfficeWilkes

Grants Award SectionSozanski

Online OperationsMission Planning & TestingSpacecraft EngineeringFlight SoftwareFactory Support Team

Flight Operations TeamHurley

Facility Systems TeamIntegration & Ground

S/W MaintenanceGround Ops Team

OCC OperationsEagan

Ops. Science SupportCalibrationMission PlanningSci. Data Sys. PlanningIPI Teams

ScienceTananbaum

Hardware & SystemsSoftware DevelopmentTestArchive OperationsData Processing Operations

Science Data SystemFabbiano

Systems EngineeringHolmes

Chandra X-ray Center Program OfficeTananbaum

Canizares (MIT)Brissenden

MSFC Space Systems Programs & Projects OfficeHefner


Program Level Status – Program Management

• Budget– The CXC’s budget is on track with the FY10 Operating Plan

– Funded through December 31

• CXC contract– Extension provides for a base extension to 9/30/13 with two three-

year options to 9/30/16 and 9/30/19

– Period of performance has been modified to allow administration of grants beyond the end of operations

• NASA Senior Review – Submitted proposal 2/9/10, presentation 4/6/10

– Chandra rated 9.5/10, second of 11 missions

– Education and Public Outreach proposal requested for submission 1/24/11


Program Level Status – Program Management

• Reviews and Conferences– Peer Review of Chandra proposals, 21-25 June

– Workshop on Accretion Processes in X-rays: From White Dwarfs to Quasars, 13-15 July

– Einstein Fellows Symposium, 10 October

• Awards– Harvey Tananbaum was awarded the 2010 Massey Award for his career

accomplishments in high-energy astrophysics


Program Level Status – Operations

• Spacecraft– Continues to operate extremely well overall

– Nominal passages through summer eclipse season

– We are modifying flight software and ground systems to allow selected spacecraft operations to continue during heightened solar activity while safing science instruments.

Operations include eclipse handling, momentum unloading and maneuvers to ensure planned thermal profile. Increases spacecraft safety margins.

In many cases it will speed up the return to observing following periods of solar activity.

• Science Instruments– Instruments are operating extremely well

• Operations Control Center– NASA approved renewal of Authority to Operate the

operations ground system 7/23


Version Date Main contentsD

S 8.2.2

May 4

Web Reports/TOO Manager

DS 8.3

Jun 29

Pipeline Intrument tools upgrade - full rebuild

DS 8.3.1

Jul 15

Web service patch -- Web only

DS 8.3.2

Jul 27

V&V Error response

DS 8.3.2.1

Sep 14

SDP Error Response patch

DS 8.3.3

~Oct 27

Instrument tool/archive OTS upgrade

CIAO 2.1

Jul 19

Sherpa CIAO patch


• Mission Planning: Load-interrupting TOOs– 3 load-interrupting TOOs during this period

• Data Processing– Automatic processing is current; mean time from

end of observation to delivery to user remains at about one day

• CXC Data System Releases



• Chandra Source Catalog releases

• Calibration Database (CalDB) ReleasesContents include two ACIS T_GAIN upgrades, HRC-I BKGRND

and background spectra files, and one HRC-I SAMP gain upgrade.

– CalDB 4.3.0 06/11/10

– CalDB 4.3.1 09/22/10

• GO and Fellows Program, CXC Director’s Office– Einstein Fellows Symposium held 19-20 Oct

– Cycle 11 grant issuance is current; average time to award < 3 weeks

– Developing process to fast-track grants for observations made before official start of observing cycle

Version Date Main contentsCAT 3.2.5 Aug 10 CSCview v1.1CSC Rel 1.1 Aug 10 CSC Release 1.1CAT 3.2.6 ~Nov 8 Crossmatch release



• Education and Public Outreach– 6 press releases and 8 image releases since last

meeting– Working on a televised NASA Science Update for

November– Started two new blog series: Women in the High

Energy Universe and Chandra Going Toward Solar Maximum

– Chandra blogs are being featured by on-line Christian Science Monitor

– Created tutorials on public web site to make Chandra archive data more readily usable by the general public (“citizen scientists”)

– Participated in USA Science & Engineering Fair on the Mall in DC (Oct. 23-24)

– Article on From Earth to the Universe in Spark, the AAS education newsletter


Mission MetricsMUPS Fuel Usage


Mission MetricsThruster Warm Starts


Mission MetricsObserving Efficiency

0.4

0.45

0.5

0.55

0.6

0.65

0.7

0.75

0.8

0.85

0.9

Oct-09 Nov-09 Dec-09 Jan-10 Feb-10 Mar-10 Apr-10 May-10 Jun-10 Jul-10 Aug-10 Sep-10

Processed Observing Efficiency

Observing efficiency had been limited to ~65-70% byradiation belt passages. Available observing time is increasinggradually as Chandra’s evolving orbit reduces time in the belts.


Data Delivery Effectiveness

As of middle of following month As of 10/7/10

Days to Data Delivery Month

Number of Obs Min Avg Max

Number Delivered

Number Outstanding

Number Delivered

Number Outstanding

Oct-09 67 0 2 14 66 1 67 0

Nov-09 68 0 3 15 68 0 68 0

Dec-09 84 0 2 11 84 0 84 0

Jan-10 97 0 2 22 97 0 97 0

Feb-10 79 0 1 5 79 0 79 0 Mar-10 64 0 2 13 64 0 64 0 Apr-10 69 0 1 7 69 0 69 0

May-10 74 0 1 3 74 0 74 0

Jun-10 69 0 1 9 69 0 69 0

Jul-10 77 0 1 7 77 0 77 0

Aug-10 63 0 1 7 62 1 63 0

Sep-10 67 0 1 8 67 0 67 0


Grant Award Effectiveness

SAO Grants (2)

As of middle of following month As of 10/12/10

Month of Data

Delivery

Federal Grants

(1,3) Non-Federal Grants (3)

No. Grants Awarded

No. Outstanding

Avg days to award (4)

No. Grants Awarded

No. Outstanding

Outstanding Awa rds Proposal no, Comments

Oct-09 0 1 1 0 13 1 0 Nov-09 0 5 5 0 16 5 0 Dec-09 1 29 29 0 42 29 0 Jan-10 5 60 60 0 32 60 0 Feb-10 1 5 5 0 23 5 0 Mar-10 1 17 17 0 24 17 0 Apr-10 0 7 7 0 22 7 0 May-10 0 9 9 0 16 9 0 Jun-10 0 13 13 0 11 13 0 Jul-10 1 8 7 1 11 7 0 11400637 -PI moved to a foreign

institution, award has been cancelled. Number of grants awarded updated from 8 in mid-August to 7.

In addition to these awards, 14 fellowship awards were issued in July.

Aug-10 1 3 3 0 7 3 0 In addition to these awards, 9 fellowship awards were issued in August.

Sep-10 0 4 4 0 9 4 0 (1) Grants awarded to scientists at Federal institutions as interagency transfers through MSFC. (2) Grants awarded to scientists at non-Federal institutions through SAO Contracts and Grants Department. (3) Number of grants eligible for award, for which data were delivered to the observer in the month. (4) Average days from data delivery to grant award to observer.

Chandra State of Health Overview

• Overall health of the Chandra vehicle remains outstanding

• All subsystems operating on their primary side equipment with only two exceptions– Inertial Reference Units (IRUs) and the Mechanism Controller Electronics

(MCEs)– In both cases, the units were swapped to their redundant side for

operational considerations and not due to unit failures• To date, Chandra has experienced few operationally impacting anomalies; all have

been either fully resolved or are being effectively mitigated– Thermal issues have been challenging, but they are well characterized and

manageable while maintaining a full and efficient observing program – IEPHIN performance issues being mitigated through use of High Resolution

Camera data as alternative source of radiation data for autonomous safing• Subsystem performance and operating environment assessed on daily, weekly,

monthly, and biannual bases to quickly identify and respond to adverse trends

• The flight team has spent considerable efforts investigating and preparing for possible future mission impacting events, including development of products for quick response

• Routine maintenance activities continue to ensure desired performance levels

• Effects of orbit evolution well understood and being addressed

16

Chandra Major Subsystem State of Health

17

Color Key:blue – no known issuesgreen – minor issue but meeting all requirementsyellow – moderate issue that minimally affects performancered – major issue affecting performance

Overall vehicle health remains excellent

Subsystem Lifetime Issues

• Analyses associated with extending vehicle life include periodic life limiting factors studies which analyze all mission consumables and life-limited items

Static hardware items: Dynamic hardware items:

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Subsystem Life Limited Items Propulsion Tanks, Thrusters, Isolation Valves,

Lines Thermal Heaters, MLI, Mirrors PCAD Sun Sensors CCDM OBC EMI Gasket, SSRs OBC Flight Software Free Memory

Subsystem Life Limited Item

Fuel Propulsion Thruster Warm Starts IRU Spin Bearing Solar Array Drive Reaction Wheel Bearings

PCAD

Star Camera CCD Dark Current Solar Array Output Battery Charge / Discharge Cycles

EPS

Power Control Unit Relays SIM Focus Assembly

MECH

SIM Translation Table

OTG Objective Transmission Grating Actuators

• Of primary interest are fuel remaining and budgeted allocations for items such as thruster warm starts and mechanism moves

Consumables Status

Consumables are in good shape!19

TSC Lifetime Translation Steps

• All three batteries healthy, solar array capability remains above the pre-launch predicted worse case estimates

Power Status

Plenty of power for the extended mission!20

CHANDRA SOLAR ARRAY DEGRADATION (20 YEARS)

1000

1100

1200

1300

1400

1500

1600

1700

1800

1900

2000

2100

2200

2300

2400

2500

2600

2700

2800

2900

07/0

1/9

9

07/0

1/0

0

07/0

1/0

1

07/0

1/0

2

07/0

1/0

3

07/0

1/0

4

07/0

1/0

5

07/0

1/0

6

07/0

1/0

7

07/0

1/0

8

07/0

1/0

9

07/0

1/1

0

07/0

1/1

1

07/0

1/1

2

07/0

1/1

3

07/0

1/1

4

07/0

1/1

5

07/0

1/1

6

07/0

1/1

7

07/0

1/1

8

07/0

1/1

9Date

Wat

ts

Last Updated: 7/31/2010

Measured Max Bus Power

Future Estimated Max Bus Power

Exponential Trend Fit

CHANDRA DAILY AVERAGE LOAD BUS VOLTAGE

(Twenty Years)

27.00

27.50

28.00

28.50

29.00

29.50

30.00

30.50

31.00

31.50

32.00

7/2

4/1

99

9

7/2

4/2

00

0

7/2

4/2

00

1

7/2

4/2

00

2

7/2

4/2

00

3

7/2

4/2

00

4

7/2

4/2

00

5

7/2

4/2

00

6

7/2

4/2

00

7

7/2

4/2

00

8

7/2

4/2

00

9

7/2

4/2

01

0

7/2

4/2

01

1

7/2

4/2

01

2

7/2

4/2

01

3

7/2

4/2

01

4

7/2

4/2

01

5

7/2

4/2

01

6

7/2

4/2

01

7

7/2

4/2

01

8

7/2

4/2

01

9

7/2

4/2

02

0

Date

Vo

lts


Coarse Estimate Based on Solar Array Degradation Trend

DAILY AVERAGE LOAD BUS POWER

650.00670.00690.00710.00730.00750.00770.00790.00810.00830.00850.00870.00890.00910.00930.00950.00970.00

7/24

/199

9

1/24

/200

0

7/24

/200

0

1/24

/200

1

7/24

/200

1

1/24

/200

2

7/24

/200

2

1/24

/200

3

7/24

/200

3

1/24

/200

4

7/24

/200

4

1/24

/200

5

7/24

/200

5

1/24

/200

6

7/24

/200

6

1/24

/200

7

7/24

/200

7

1/24

/200

8

7/24

/200

8

1/24

/200

9

7/24

/200

9

1/24

/201

0

7/24

/201

0

DateW

atts


DAILY AVERAGE LOAD BUS POWER DRAW

State of Health Summary

• Overall, Chandra vehicle health remains excellent

• Although minor issues have surfaced, the operations team has ensured that these issues are non-impacting and do not threaten an extended Chandra mission

• Continued diligence being applied to trending, monitoring, managing thermal challenges, and preparing for anomalies

• At this time there are no known limitations due to degradation, consumables, aging, or obsolescence that would prevent our meeting Level 1 requirements over the course of a 20-year mission

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chandra users’ committee cxc manager’s status report for the period may 2010 – october 2010...

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