James Webb Space Telescope optical performance predictions post cryogenic vacuum tests

Lightsey, Paul A.; Knight, J. Scott; Barto, Allison; Smith, Koby; Chonis, Taylor S.; Coyle, Laura; Acton, Scott T.; Rohrbach, Scott; Mehalick, Kim; Feinberg, Lee; Hayden, William L.; Atkinson, Charles B.; Wells, Conrad; Hadaway, James B.

doi:10.1117/12.2312276

Cited by 7 publications

(6 citation statements)

References 6 publications

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“…(2018) 33 also provide quantitative performance summaries for tests whose results are discussed more qualitatively below.…”

Section: Optical Test Resultsmentioning

confidence: 99%

“…All major objectives of the test program were accomplished, including the full prioritized matrix of optical requirement verifications, cross-checks, and demonstrations (see Lightsey et al [2018] 33 for additional quantitative details). The expectation, based on OTIS testing, is that the JWST payload will meet its specifications and deliver the revolutionary science it has been designed for (see e.g.…”

Section: Discussionmentioning

confidence: 99%

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James Webb Space Telescope (JWST) optical telescope element and integrated science instrument module (OTIS) cryogenic test program and results

Kimble

Feinberg

Voyton

et al. 2018

Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave

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“…(2018) 33 also provide quantitative performance summaries for tests whose results are discussed more qualitatively below.…”

Section: Optical Test Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

James Webb Space Telescope (JWST) optical telescope element and integrated science instrument module (OTIS) cryogenic test program and results

Kimble

Feinberg

Voyton

et al. 2018

Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave

Self Cite

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“…26 Like the other tests in the verification chain, the test criteria were established well ahead of the test so that the outcome of the test as a pass or fail was quickly and unambiguously established. 27,28 The specifics of how to verify the optical performance and wavefront was an intense area of effort culminating in large part at the time around MCDR. There was a small set (11) of so-called complex requirements which drive the critical performance parameters and cannot be tested end to end on the ground.…”

Section: Confidence In the Performace Of The Design: Verificationmentioning

confidence: 99%

Designing a new, large, complex observatory: learning the strategic lesson of newness from our experience on the James Webb Space Telescope

Arenberg,

Glassman,

Starr

et al. 2024

J. Astron. Telesc. Instrum. Syst.

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We formulate the lessons Northrop Grumman personnel have learned from their work on development of the James Webb Space Telescope. These lessons are strategic in nature and bear on the common behavior during development of all large complex systems, such as astrophysics missions, also known colloquially as Flagships. To justify the expense, a Flagship must be a large leap in scientific capability, demanding new architectures and technologies coupled with an intolerance to risk. We define "The Problem of Newness" based on our experience and data from Webb's development. This unseen hand was present during Webb, and it is only in retrospect that we have been able to define it and present it as a lesson for the future. Future missions, Flagships in particular, should recognize the challenge of newness as a natural consequence of development and take steps to minimize its impact.

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“…We also have more mature tools for integrated modeling of observatory performance. 9 Therefore we can revisit earlier assumptions about wavefront stability for coronagraphic observations in order to derive our best estimates for JWST high contrast based on our current knowledge of the observatory's expected properties.…”

Section: Imaging Psfmentioning

confidence: 99%

Updated optical modeling of JWST coronagraph performance contrast, stability, and strategies

Perrin

Pueyo

Gorkom

et al. 2018

Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave

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We update performance simulations and contrast predictions for JWST's coronagraphs based on the latest information on the as-built telescope and instrument properties, including both static and dynamic contributions to wavefront error. By combining optical modeling of the telescope, instruments and coronagraph optics along with STScI's rigorously-validated exposure time calculation engine, we develop updated contrast models including contributions from effects such as target acquisition residuals, stellar color differences, etc. We present assessments of the impact of wavefront error changes over time between science and PSF reference stars, using modeled wavefront drifts on various timescales based on available observatory structural/thermal/optical modeling and tested performance during the OTIS cryo test, extrapolated to on-orbit conditions. For NIRCam we explore tradeoffs between different occulting masks at a given wavelength. Between now and the start of Cycle 1 science, these and other updated simulations will enable the science community to prepare analysis tools and PSF subtraction software to hit the ground running with JWST coronagraphic observations.

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James Webb Space Telescope optical performance predictions post cryogenic vacuum tests

Cited by 7 publications

References 6 publications

James Webb Space Telescope (JWST) optical telescope element and integrated science instrument module (OTIS) cryogenic test program and results

James Webb Space Telescope (JWST) optical telescope element and integrated science instrument module (OTIS) cryogenic test program and results

Designing a new, large, complex observatory: learning the strategic lesson of newness from our experience on the James Webb Space Telescope

Updated optical modeling of JWST coronagraph performance contrast, stability, and strategies

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