19 July 2016 Preparing for JWST wavefront sensing and control operations
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Abstract
The James Webb Space Telescopes segmented primary and deployable secondary mirrors will be actively con- trolled to achieve optical alignment through a complex series of steps that will extend across several months during the observatory's commissioning. This process will require an intricate interplay between individual wavefront sensing and control tasks, instrument-level checkout and commissioning, and observatory-level calibrations, which involves many subsystems across both the observatory and the ground system. Furthermore, commissioning will often exercise observatory capabilities under atypical circumstances, such as fine guiding with unstacked or defocused images, or planning targeted observations in the presence of substantial time-variable offsets to the telescope line of sight. Coordination for this process across the JWST partnership has been conducted through the Wavefront Sensing and Control Operations Working Group. We describe at a high level the activities of this group and the resulting detailed commissioning operations plans, supporting software tools development, and ongoing preparations activities at the Science and Operations Center. For each major step in JWST's wavefront sensing and control, we also explain the changes and additions that were needed to turn an initial operations concept into a flight-ready plan with proven tools. These efforts are leading to a robust and well-tested process and preparing the team for an efficient and successful commissioning of JWSTs active telescope.
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Marshall D. Perrin, Marshall D. Perrin, D. Scott Acton, D. Scott Acton, Charles-Philippe Lajoie, Charles-Philippe Lajoie, J. Scott Knight, J. Scott Knight, Matthew D. Lallo, Matthew D. Lallo, Marsha Allen, Marsha Allen, Wayne Baggett, Wayne Baggett, Elizabeth Barker, Elizabeth Barker, Thomas Comeau, Thomas Comeau, Eric Coppock, Eric Coppock, Bruce H. Dean, Bruce H. Dean, George Hartig, George Hartig, William L. Hayden, William L. Hayden, Margaret Jordan, Margaret Jordan, Alden Jurling, Alden Jurling, Trey Kulp, Trey Kulp, Joseph Long, Joseph Long, Michael W. McElwain, Michael W. McElwain, Luis Meza, Luis Meza, Edmund P. Nelan, Edmund P. Nelan, Remi Soummer, Remi Soummer, John Stansberry, John Stansberry, Christopher Stark, Christopher Stark, Randal Telfer, Randal Telfer, Andria L. Welsh, Andria L. Welsh, Thomas P. Zielinski, Thomas P. Zielinski, Neil T. Zimmerman, Neil T. Zimmerman, "Preparing for JWST wavefront sensing and control operations", Proc. SPIE 9904, Space Telescopes and Instrumentation 2016: Optical, Infrared, and Millimeter Wave, 99040F (19 July 2016); doi: 10.1117/12.2233104; https://doi.org/10.1117/12.2233104
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