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JWST Status

JWST Status. Eric P. Smith JWST Program Scientist. Topics. JWST Cost Growth Science Assessment Team Findings and Program Response JWST Plans. Recent Programmatic Changes. ~$1B net cost growth ~$180M at NGST and ~$35M at subs Reevaluation of I&T effort (metrology, GSE)

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JWST Status

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  1. JWST Status Eric P. SmithJWST Program Scientist

  2. Topics • JWST Cost Growth • Science Assessment Team Findings and Program Response • JWST Plans

  3. Recent Programmatic Changes ~$1B net cost growth • ~$180M at NGST and ~$35M at subs • Reevaluation of I&T effort (metrology, GSE) • Additional launcher-related testing requirements • Reallocation of technical resources (e.g., mass and power budgets) among observatory elements • ~$85M in instruments and related elements • ~$160M of recommended added contingency funding • ~$600M for 22 month launch slip to 6/2013 • Launch vehicle uncertainty and lack of TAA • Budget profile limitations in FY06 and 07 • Schedule risk reduction (negotiated w/ NGST) • Technology maturation efforts remain on schedule

  4. Science Assessment Team (SAT) Findings • “… the scientific case for the JWST mission has become even stronger since its highest ranking by the Decadal report in 2000.” • Retain current 6.5 meter primary aperture • Retain current instrument complement • Priority on unique capabilities, i.e., performance longward of 1.7 microns, given the limitations of other future ground and space-based assets • Use prioritization as a guide to reduce cost and risk

  5. SAT-Endorsed Changes

  6. SAT-Endorsed Changes:Science Instruments

  7. Moving Forward NASA’s Independent Program Analysis Office (IPAO) Independent Assessment Consult scientists regarding JWST’s scientific significance, prioritize JWST’s capabilities Revise mission development plan Preliminary Final Science Assessment Team (SAT) Formulate budget May’05 Apr’06

  8. JWST Replan • It’s not over… • Additional study of I&T and verification plan forecast with ultimate conclusion around April 06 • Will this happen again? • History of replans • 8m  6m diameter requirement, Fall 2000 • Replan I, Fall 2002 • Replan II, Summer 2005 • (see chart 9) • Will the science change? • No, first light goal combined with NAS decadal position prohibits significant changes in observatory

  9. HST (no servicing costs) JWST HST Spending History (Projection)

  10. today ... Concept Development Design, Fabrication, Assembly and Test science operations Phase E Phase C/D Phase A Phase B Formulation Initial Confirmation Review (ICR) Non-Advocate Review (NAR) -Program Commitment- Launch Authorization … Formulation Implementation JWST Program Today • Early emphasis on vigorous technology development to retire risk • Pacing items (primary mirror, detectors) already in Phase C/D and flight production • ~$820M (~20% of Phase A through D total) invested so far

  11. Summary Actions being taken to address JWST cost and schedule changes • Current estimated cost, inception through launch $3.7B • Current estimated cost, Oct’06 through launch $2.9B • Science assessment complete • JWST reconfirmed as mission of paramount significance and priority • Scientific capabilities prioritized • Recommendations provide some cost savings and significant risk reduction; added flexibility for program management • Preliminary replanning complete, FY07 budget adjusted and submitted • Science assessment recommendations embraced, being implemented • Launch in June 2013 • Preliminary stage of independent assessment found program work plan fundamentally sound, but likely to need more time and money Detailed replanning will be complete by April 2006 • Fully implement embraced SAT changes • Follow-up independent review and assessment • Forms basis for FY08 budget development

  12. Instrument module James Webb Space Telescope (JWST) Telescope Mission Objective • Study the origin and evolution of galaxies, stars and planetary systems • Optimized for infrared observations (0.6 – 28 m) Organization • Mission Lead: Goddard Space Flight Center • International collaboration with ESA & CSA • Prime Contractor: Northrop Grumman Space Technology • Instruments: • Near Infrared Camera (NIRCam) – Univ. of Arizona • Near Infrared Spectrograph (NIRSpec) – ESA • Mid-Infrared Instrument (MIRI) – JPL/ESA • Fine Guidance Sensor (FGS) – CSA Primary Mirror (PM) scale: 1 meter Cold, space-facing side Warm, Sun-facing side Spacecraft Bus Sunshield Description • Deployable telescope w/ 6.5m diameter segmented adjustable primary mirror • Cryogenic temperature telescope and instruments for infrared performance • Launch NET June 2013 on an ESA-supplied Ariane 5 rocket to Sun-Earth L2 • 5-year science mission (10-year goal) www.JWST.nasa.gov Phase C/D Phase E Phase A Phase B

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