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Proceedings Paper

Optical testing and verification methods for the James Webb Space Telescope Integrated Science Instrument Module element
Author(s): Scott R. Antonille; Cherie L. Miskey; Raymond G. Ohl; Scott O. Rohrbach; David L. Aronstein; Andrew E. Bartoszyk; Charles W. Bowers; Emmanuel Cofie; Nicholas R. Collins; Brian J. Comber; William L. Eichhorn; Alistair C. Glasse; Renee Gracey; George F. Hartig; Joseph M. Howard; Douglas M. Kelly; Randy A. Kimble; Jeffrey R. Kirk; David A. Kubalak; Wayne B. Landsman; Don J. Lindler; Eliot M. Malumuth; Michael Maszkiewicz; Marcia J. Rieke; Neil Rowlands; Derek S. Sabatke; Corbett T. Smith; J. Scott Smith; Joseph F. Sullivan; Randal C. Telfer; Maurice Te Plate; M. Begoña Vila; Gerry D. Warner; David Wright; Raymond H. Wright; Julia Zhou; Thomas P. Zielinski
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Paper Abstract

NASA’s James Webb Space Telescope (JWST) is a 6.5m diameter, segmented, deployable telescope for cryogenic IR space astronomy. The JWST Observatory includes the Optical Telescope Element (OTE) and the Integrated Science Instrument Module (ISIM), that contains four science instruments (SI) and the Fine Guidance Sensor (FGS). The SIs are mounted to a composite metering structure. The SIs and FGS were integrated to the ISIM structure and optically tested at NASA's Goddard Space Flight Center using the Optical Telescope Element SIMulator (OSIM). OSIM is a full-field, cryogenic JWST telescope simulator. SI performance, including alignment and wavefront error, was evaluated using OSIM. We describe test and analysis methods for optical performance verification of the ISIM Element, with an emphasis on the processes used to plan and execute the test. The complexity of ISIM and OSIM drove us to develop a software tool for test planning that allows for configuration control of observations, implementation of associated scripts, and management of hardware and software limits and constraints, as well as tools for rapid data evaluation, and flexible re-planning in response to the unexpected. As examples of our test and analysis approach, we discuss how factors such as the ground test thermal environment are compensated in alignment. We describe how these innovative methods for test planning and execution and post-test analysis were instrumental in the verification program for the ISIM element, with enough information to allow the reader to consider these innovations and lessons learned in this successful effort in their future testing for other programs.

Paper Details

Date Published: 27 September 2016
PDF: 24 pages
Proc. SPIE 9951, Optical System Alignment, Tolerancing, and Verification X, 995105 (27 September 2016); doi: 10.1117/12.2238838
Show Author Affiliations
Scott R. Antonille, NASA Goddard Space Flight Ctr. (United States)
Cherie L. Miskey, Stinger Ghaffarian Technologies (United States)
NASA Goddard Space Flight Ctr. (United States)
Raymond G. Ohl, NASA Goddard Space Flight Ctr. (United States)
Scott O. Rohrbach, NASA Goddard Space Flight Ctr. (United States)
David L. Aronstein, NASA Goddard Space Flight Ctr. (United States)
Andrew E. Bartoszyk, NASA Goddard Space Flight Ctr. (United States)
Charles W. Bowers, NASA Goddard Space Flight Ctr. (United States)
Emmanuel Cofie, Stinger Ghaffarian Technologies (United States)
NASA Goddard Space Flight Ctr. (United States)
Nicholas R. Collins, KBRwyle (United States)
NASA Goddard Space Flight Ctr. (United States)
Brian J. Comber, Comber Thermal Solutions (United States)
NASA Goddard Space Flight Ctr. (United States)
William L. Eichhorn, Genesis Engineering Solutions, Inc. (United States)
NASA Goddard Space Flight Ctr. (United States)
Alistair C. Glasse, UK Astronomy Technology Ctr. (United Kingdom)
Renee Gracey, Ball Aerospace & Technologies Corp. (United States)
George F. Hartig, Space Telescope Science Institute (United States)
Joseph M. Howard, NASA Goddard Space Flight Ctr. (United States)
Douglas M. Kelly, Steward Observatory, Univ. of Arizona (United States)
Randy A. Kimble, NASA Goddard Space Flight Ctr. (United States)
Jeffrey R. Kirk, Genesis Engineering Solutions, Inc. (United States)
NASA Goddard Space Flight Ctr. (United States)
David A. Kubalak, NASA Goddard Space Flight Ctr. (United States)
Wayne B. Landsman, ADNET Systems, Inc. (United States)
NASA Goddard Space Flight Ctr. (United States)
Don J. Lindler, Sigma Space Corp. (United States)
NASA Goddard Space Flight Ctr. (United States)
Eliot M. Malumuth, KBRwyle (United States)
NASA Goddard Space Flight Ctr. (United States)
Michael Maszkiewicz, Canadian Space Agency (Canada)
Marcia J. Rieke, Steward Observatory, Univ. of Arizona (United States)
Neil Rowlands, Honeywell Aerospace (Canada)
Derek S. Sabatke, Ball Aerospace & Technologies Corp. (United States)
Corbett T. Smith, Orbital ATK (United States)
J. Scott Smith, NASA Goddard Space Flight Ctr. (United States)
Joseph F. Sullivan, Ball Aerospace & Technologies Corp. (United States)
Randal C. Telfer, Space Telescope Science Institute (United States)
Maurice Te Plate, European Space Agency (Netherlands)
M. Begoña Vila, Stinger Ghaffarian Technologies (United States)
NASA Goddard Space Flight Ctr. (United States)
Gerry D. Warner, Honeywell Aerospace (Canada)
David Wright, Stinger Ghaffarian Technologies (United States)
NASA Goddard Space Flight Ctr. (United States)
Raymond H. Wright, AK Aerospace Technology Corp. (United States)
NASA Goddard Space Flight Ctr. (United States)
Julia Zhou, Honeywell Aerospace (Canada)
Thomas P. Zielinski, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 9951:
Optical System Alignment, Tolerancing, and Verification X
José Sasián; Richard N. Youngworth, Editor(s)

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