James Webb Space Telescope (JWST) NAC Science Committee Rick ...

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Nov 1, 2011 - Flight backplane structure under development, center section nearing completion. Science Instruments. •.
James Webb Space Telescope (JWST) NAC Science Committee Rick Howard November 1, 2011 1!

JWST on a new path! !  NASA has made significant changes in the management of JWST! " 

Response to ICRP report ( http://www.ngst.nasa.gov/resources/ JamesWebbSpaceTelescopeIndependentComprehensiveReviewPanelReport.pdf)"

!  Communications have greatly improved between HQ, Centers and contractors, especially at senior management levels! " 

Open and honest dialogue, quick identification of issues and agreement on fixes"

!  Assessment of alternatives completed! " 

JWST still the best value to achieve Level 1 performance"

!  Completed a replan (9/23/2011) with an October 2018 launch date! " 

Plan has adequate cost and schedule reserves consistent with ICRP recommendation"

" 

Additional $44M in FY11 was approved by Congress"

" 

Replan is on track to support the FY13 budget process"

" 

Discussions between the Administration and Congress continue on FY12 budget"


 !

JWST made great progress in FY2011, achieving! milestones within cost and schedule and is now executing to the new plan! 2!

JWST Status! Telescope! #  ! # 

! 18 flight (plus 1 spare) primary mirror segments are fully assembled! All flight optics completed coating and vibration testing!

Science Instruments! •  ! • 

!

#  # 

Final cryo testing of first 12 primary mirror segments has completed! Final 6 primary segments begin last cryo test 10/24!

!

# 

•  ! • 

ISIM Integration and Test underway, harness and ISIM command and data handling computer #1 also delivered to ISIM I&T! Instrument deliveries to GSFC begin Spring 2012! NIRSpec optical bench cracks delaying that instrument!

Flight backplane structure under development, center section nearing completion!

Spacecraft! !

Sunshield! ! • 

1/3rd-Scale Sunshield testing successfully complete (flight Sunshield verification test)!

• 

Engineering Development Unit for layer #3 in test now in AL. Initial shape-under-tension measurements are good.!

• 

! MIRI completed all pre-ship tests!

All sunshield material for test units and flight layers in house.!

• 

Spacecraft design continues to mature!

• 

Many components have completed Critical Design Reviews!

• 

Engineering Model development underway/completed!

• 

Flight solid state recorder complete!

• 

Flight Software development underway! 3!

Family Portrait C1

B2

B7

A3

C2

Secondary

B2

A6

B8 C2

C1

!!

!!

B7 C6

A3 !!

!!

! A6

A5

A2

!!

! A2

A4

!!

!!

! B5

A1

! C5

B5

Tertiary

C4

!!

!!

A5 !!

SM

C6

B8

!! !!

!!

C4

B3

Fine Steering

!

!!

C3

B3

! B6 !!

C5

A4

B6

A1

C3

Mirror segment has completed all thermal testing

4!

Mirror Cryo-Optical Testing! "   XRCF testing of the second batch of 6 PMSAs is complete! "   Overall surface figure error (SFE) with 12 segments is 24.2 nm RMS ! "  Primary Mirror (18 segment) SFE requirement is = 25.8 nm RMS" "  Projected SFE for 18 segment primary Mirror is ≤ 24.6 nm" "  A6 and C4 PMSA segments do not meet their individual SFE specification, but that is accommodated by allocated margin at the primary mirror level. "

Simulated 2 μm image: Strehl > 0.8

XRCF cryo-test results! 5!

Sunshield! "   Template membrane build to flight-like requirements for verification of:! " 

Shape under tension to verify gradients and light line locations"

" 

Hole punching & hole alignment for membrane restraint devices (MRD)"

" 

Verification of folding/packing concept on full scale mockup"

" 

Layer 3 shape measurements completed" $Layer-3 template membrane under tension for 3-D shape measurements at Mantech ! Full-scale JWST mockup with sunshield pallette % &!

6!

Completion of Ambient Optical Alignment Stand

•  Media event held at manufacturer in Syracuse, NY. •  Hardware now being shipped to NASA Goddard Space Flight Center test facility, Greenbelt, MD.

7!

Integration and Testing at GSFC! Building 29 Clean Room

Flight Integrated Science Instrument Module (ISIM) Ambient Optical Assembly Stand Under construction 8!

OTE Testing – Chamber A at JSC!

Notice people for scale

Will be the largest cryo vacuum test chamber in the world 9!

JSC Chamber A! Modifications to Johnson Space Center Chamber are progressing! "  Distribution system for LN2 and GHe system under way" " 

GHe refrigeration system installation completed"

" 

Installation of ceiling shroud completed"

" 

Floor shroud fabrication completed with installation under way"

" 

Wall shroud fabrication completed with installation beginning after the floor installation"

" 

Make-up air units for airflow management systems installed"

GHe Ceiling on the lifting cradle

GHe Shroud Floor – Side A

10!

JWST FY11 Milestones (as of 9/30/11)! Month!

Milestone!

Comment!

Jan ʼ11"

Ship Mid-Infrared Instrument (MIRI) Focal Plane Electronics to ESA (Rutherford Appleton Lab.)
 Ball's Flight Actuator Drive Unit Software Test Review"

Successfully Completed - 1/24" " Successfully Completed – 1/20"

Feb ʼ11"

Deliver Near-Infrared Spectrograph flight spare detector to GSFC
 Pathfinder Primary Mirror Backplane Support Structure delivered to NorthropGrumman Aerospace Sys." " Establish No-Earlier-Than Launch Readiness Date (LRD) as part of replan
 " Establish Work Breakdown Structure for new GSFC responsibilities"

Successfully Completed – 1/29" Pathfinder delivered to NGAS on 3/25" Based on current funding constraints a NET LRD of Oct. 2018 established, FY11 and FY12 schedule does not preclude an earlier date if deemed possible in the future – Completed 2/25" " Successfully Completed – 2/28"

Mar ʼ11"

Complete flight ISIM Remote Services Unit Thermal Vacuum testing
 Deliver Fine Guidance Sensor (FGS) test unit electronics to ISIM Integration & Test (I&T)
 Complete 2018 LRD budget details"

Successfully Completed – 2/19" Successfully Completed – 2/24" Preliminary Budget was presented to Program Office and Center Management on 4/7 "

Apr ʼ11"

Pathfinder Primary Mirror Segment Assemblies complete
 Deliver ISIM Command & Data Handling test unit to ISIM I&T
 Complete 2018 LRD project lead Joint cost & schedule Confidence Limit (JCL)"

Successfully Completed - 4/25" Successfully Completed – 4/22" Initial JCL run completed – 4/28"

May ʻʼ11"

Start flight FGS environmental testing (instrument level)
 Complete Spacecraft Secondary Mirror Segment Cone Structure internal Design Rreview 3/4"

Successfully Completed - 5/4" Successfully completed – 4/20"

Jun ʼ11"

Complete Common Command & Telemetry System Build 2.3 " Start ISIM level I&T"

Successfully completed – 4/13" Successfully Completed - 6/24 Began the ISIM Flight I&T with the integration  of the Spacecraft Simulator 2A (SCSIM-2A) into the Flight Electrical Environment. "

Jul ʼ11"

Deliver ISIM Region 1 Wiring Harnesses
 Deliver ISIM Structure to ISIM I&T"

Successfully completed – 7/22" Successfully completed – 7/28"

Aug ʼ11"

Spacecraft Flight Software Build 1 Technical Readiness Review"

Successfully Completed – 6/30"

Sept ʻ11"

Deliver Flight ISIM Electronics Compartment to ISIM I&T
 Deliver flight ISIM Command & Data Handling unit #1 to ISIM I&T"

Delayed due to design changes" Completed – 9/27" 11!

Hardware Fabrication Completion Percentages! Primary Mirror Support Structure!

Primary Mirror Segments!

100%"

Aft Optics System Bench!

75%"

100%" 100%"

Tertiary Mirror!

100%" Fine Steering Mirror!

Science Instrument Module! & Science Instruments!

90%"

95%" Secondary Mirror !

Green borders denote actual spaceflight hardware images, red borders are test equipment!

Secondary Mirror Supports!

25%"

40%"

90%"

Spacecraft Bus!

As of 10/10/2011!

Sunshield Membranes!

12!

JWST Master Schedule! 2010

JWST Overview Schedule

2011

FY10 2

3

2012

FY11 4

1

2

2013

FY12

3

4

1

2

3

2014

FY13 4

1

2

2015

FY14

3

4

1

2

2016

FY15

3

4

1

2

2017

FY16

3

4

1

2

3

4

1

2

CDR CCA, SC Panel Prop SS Integ Integ Integ

4

Integration & Test

JSC CH A PF Install/ GSE Install Test

OTE

Start EDU 3rd Cryo Test

Del PF PMSA

1st Batch

Primary Mirrors 8

4

9

2 4 PF Optics Integ 3 2

PF SMSS/Strut Integ

Last Batch

10

41

2

8

11

7

11

8 10

4

2 12

4

MOR

OTIS I&T

1

2

FY19

3

4

SIR KDP-III

4

9

SC Test

7

Flt Optics Integ

7 Flight OTE Structure PMBSS Assy/Test

BSF Assy Start

Wing Assy Start

4

3

2019

FY18

3

TRR

Major Mission Milestones

2018

FY17

2 7

12

PSR 8 FRR/KDP-IV

SC/OTE I&T 9

4 5

1

LRD 10

2

3

ORR 4

9 Launch Site 9 10

2 7

3 4

Flight Structure (PMBSS) 1

12 Flt Membrane MRR

TemplateMembrane Fab

2

6

Flt Membrane Fab

Sunshield 10

Astro Tube Fab 2

4

4

GSE Design/Fab Structure Mfg & Test

9 11

4

6

12

12

Spacecraft ISIM

SC Panel & SC Structure

CDR Start I&T

I &T ETU Del

7

NIRSpec 1

6 Del Flt ISIM to OTIS

PER 11 Flt Del

2

STM Del

11

2

4

3

13 Months of Funded Critical Path Slack 6 Months at Observatory I&T 3 Months at OTE I&T 4 Months of Embeded Slack in OTE Activities

Decreased from 31 to 26 months

4

ETU Del

NIRCam

Flt Del 5 ETU Del 5

4

8

26

5

Flt Del

FGS

4 SC Structure

8

MIRI 3

Integ Skeleton & Membrane

4

8 Flt Del 6 Flt CHA

Fit Check CHA

ETU CCA CCES/CELS Mock-up Flt CTA

Flt Flt CCA/CCE CCA/CCE (Spares)

Cryo Cooler System CCTS Build 2.3

4

8 CCTS Build 2.4

10

10

2 CCTS Build 2.5

1

7 Begin End-to-End Grnd/Flt Seg Testing

4

1

9

10

Comissioning

Ground Segment Launch Segment

Safety Submittal 2 MGSE Test Adapter & Clampband System

LV Lift Performance Verified

8 Flight Adapter Fit Check

8

12

10

CLA6 4

7

10 4 Safety Submittal 3 RAMF Ariane Adapter DCI Release 2 (Final) Flight Adapter & 11 5 67 Shogun Equip CLA7 CLA8 LV Readiness Review (RAV) 3 9 12 4 7 9

13!

JWST Budget Profile (July 2011) 700,000 " 600,000 " 500,000 " 400,000 " JWST Replan"

300,000 " 200,000 " 100,000 " - " 2010"

2011"

2012"

2013"

2014"

2015"

2016"

2017"

2018"

2019"

!  The replan addresses the findings of the SRB and the ICRP report! " 

Avoids making the mistakes identified by ICRP by providing adequate funding in early years"

" 

Provides a profile that can retire risk earlier by accelerating critical activities"

14!

Summary of JWST Breach Report (1 of 3)! Provided Report to Congress under Sec 103(d)(2) of PL 109-155 (“Breach Report”) on October 24, 2011!

! 

! 

" 

Projected cost and schedule for completing the program"

" 

Assessment of broad range of alternatives to the program"

New baseline supports an October 2018 LRD for a total LCC of $8.8B! " 

Includes 13 months of funded schedule reserve"

" 

Includes funding in base to cover all high probability threats"

" 

Cost reserves are consistent with ICRP recommendation (80% cost confidence)"

New baseline will require approximately $1.2B in additional funding in FY12-FY16! " 

This is above the FY12 Presidentʼs Budget Request ($375M per year)"

" 

NASA proposes to redirect funds from within its budget" •  Half from the Science Mission Directorate programs (none from Earth Science)" –  would delay some future missions that are currently planned for launch beyond 2015" •  Half from Cross-Agency Support account" –  would leave that account at about the FY10 level" •  NASA and the Administration continue to discuss the budget adjustments (will be finalized in the FY13 Presidentʼs budget request)" 15!

Summary of JWST Breach Report (2 of 3)! Provided Report to Congress under Sec 103(d)(2) of PL 109-155 (“Breach Report”) on October 24, 2011! " 

Projected cost and schedule for completing the program"

" 

Assessment of broad range of alternatives to the program"

!

!

• 

Cost through FY11 - $3,536M

• 

Phase A/B (Formulation) Cost: $1,800M!

• 

Phase C/D (Development) Cost: $6,198M!

• 

Phase E (5 years ops plus 2 years data analysis): $837M!

Cost to Go (FY12 through on-orbit commissioning) - $4,462M!

16!

Summary of JWST Breach Report (3 of 3)! !  Assessment of Alternatives! " 

Analysis done by independent group (Aerospace Corp)"

" 

Detailed study performed to ensure that the broadest possible set of options considered" •  Four broad categories (airborne, ground, space, variants to the JWST baseline) and hybrid combinations were considered" •  Performance measured against JWST Level 1 science requirements" –  Baseline Science Requirements are in Section 1 or Breach Report"

•  Total of 12 alternatives used in study including three variants to the baseline JWST and two hybrids"

!

" 

NASA agrees with the results of the Aerospace analysis"

" 

The JWST baseline is the best value, even at the higher cost to go. "

17!

JWST Near Term Program/Project Office Efforts! !  Provided Report to Congress under Sec 103(d)(2) of PL 109-155 (“Breach Report”) on October 24, 2011! " 

Projected cost and schedule for completing the program"

" 

Assessment of broad range of alternatives to the program"

!  Capitalize on new plan as we transition from re-planning to building! " 

Already have accelerated final tests of 6 remaining Primary Mirror Segment Arrays at the XRCF. Will start 10/24 and complete before year end."

" 

Letter sent to Northrop-Grumman instructing them to pull in schedule on Primary Mirror Backplane Assembly by ~6-8 months."

" 

Discussions underway to accelerate spacecraft Critical Design Review [CDR] (last remaining major element not past itʼs CDR) by 4-6 months."

18!

BACKUP!

19!

4. Cost Breakdown by Element through FY11 ($3.5B total)!

20!

JWST Program Budget! As of July 2011

Total JWST (A-D)

PBR*

Delta to PBR **

Prior

FY10

FY11

FY12

FY13

FY14

FY15

FY16

FY17

FY18

FY19

2552

460

515

531

630

662

650

625

575

524

224

471

375

375

375

375

375

44

156

255

287

275

250

FY20 TOTAL A-D

50

7998

1267

* PBR is FY12 President's Budget Request for FY12-FY16 plus FY11 approved budget. ** An FY11 operating plan update requesting the additional $44M was sent to Congress on August 16, 2011

As in Breach Report (October 2011)

21!