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The wide field infrared survey telescope (WFIRST) observatory: design formulation (phase-A) overview (Conference Presentation)
Author(s): Thomas M. Casey; Nerses V Armani; Wes L Alexander; Lisa M Bartusek; Carl A Blaurock; David F Braun; Alexander J Carra; David A Content; Yves Conturie; Christine E Cottingham; Richard T Demers; Michael J Dipirro; Robert T Effinger; Robert M Egerman; Frank Forkl; Guangjun Gao; John D Gygax; John G Hagopian; Timothy Hahm; John P Hawk; Gurnie C Hobbs; Clifton E Jackson; Alden S Jurling; Brian D Kern; Jeffrey W Kruk; Xiaoyi Li; Kuo-chia Liu; Catherine T Marx; Marzouk Marzouk; Carson S McDonald; Seke G Godo; Mark E Melton; James Mondello; M. Charley Noecker; Bert A Pasquale; Hume L Peabody; Ilya Y Poberezhskiy; Cory A Powell; Giulio G Rosanova; John A Ruffa; Jeffrey S Smith; Hong Tang; Christopher S Tolman; Arthur L Whipple; Timothy J Wilson; Melissa F Vess; Perry Voyer
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Paper Abstract

NASA’s Wide Field Infrared Survey Telescope (WFIRST) is being designed to deliver unprecedented capability in dark energy and exoplanet science, and to host a technology demonstration coronagraph for exoplanet imaging and spectroscopy. The observatory design has matured since 2013 [“WFIRST 2.4m Mission Study”, D. Content, SPIE Proc Vol 8860, 2013] and we present a comprehensive description of the WFIRST observatory configuration as refined during formulation phase (AKA the phase-A study). The WFIRST observatory is based on an existing, repurposed 2.4m space telescope coupled with a 288 megapixel near-infrared (0.6 to 2 microns) HgCdTe focal plane array with multiple imaging and spectrographic modes. Together they deliver a 0.28 square degree field of view, which is approximately 100 times larger than the Hubble Space Telescope, and a sensitivity that enables rapid science surveys. In addition, the technology demonstration coronagraph will prove the feasibility of new techniques for exoplanet discovery, imaging, and spectral analysis. A composite truss structure meters both instruments to the telescope assembly, and the instruments and the spacecraft are on-orbit serviceable. We present the current design and summarize key Phase-A trade studies and configuration changes that improved interfaces, improved testability, and reduced technical risk. We provide an overview of our Integrated Modeling results, performed at an unprecedented level for a phase-A study, to illustrate performance margins with respect to static wavefront error, jitter, and thermal drift. Finally, we summarize the results of technology development and peer reviews, demonstrating our progress towards a low-risk flight development and a launch in the middle of the next decade.

Paper Details

Date Published: 10 July 2018
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Proc. SPIE 10698, Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave, 106982C (10 July 2018); doi: 10.1117/12.2313748
Show Author Affiliations
Thomas M. Casey, ASRC Federal Holding Co. (United States)
Nerses V Armani, Stinger Ghaffarian Technologies Inc. (United States)
Wes L Alexander, NASA Goddard Space Flight Center (United States)
Lisa M Bartusek, NASA Goddard Space Flight Center (United States)
Carl A Blaurock, Trident Vantage Systems, Inc. (United States)
David F Braun, Jet Propulsion Laboratory, California Institute of Technology (United States)
Alexander J Carra, Genesis Engineering Solutions, Inc. (United States)
David A Content, NASA Goddard Space Flight Center (United States)
Yves Conturie, Harris Corp., Space and Intelligence Systems (United States)
Christine E Cottingham, NASA Goddard Space Flight Center (United States)
Richard T Demers, Jet Propulsion Laboratory, California Institute of Technology (United States)
Michael J Dipirro, NASA Goddard Space Flight Center (United States)
Robert T Effinger, Jet Propulsion Laboratory, California Institute of Technology (United States)
Robert M Egerman, Harris Corp., Space and Intelligence Systems (United States)
Frank Forkl, Harris Corp., Space and Intelligence Systems (United States)
Guangjun Gao, Sigma Space Corporation (United States)
John D Gygax, NASA Goddard Space Flight Center (United States)
John G Hagopian, Sigma Space Corporation (United States)
Timothy Hahm, Harris Corp., Space and Intelligence Systems (United States)
John P Hawk, NASA Goddard Space Flight Center (United States)
Gurnie C Hobbs, NASA Goddard Space Flight Center (United States)
Clifton E Jackson, Stinger Ghaffarian Technologies Inc. (United States)
Alden S Jurling, NASA Goddard Space Flight Center (United States)
Brian D Kern, Jet Propulsion Laboratory, California Institute of Technology (United States)
Jeffrey W Kruk, NASA Goddard Space Flight Center (United States)
Xiaoyi Li, NASA Goddard Space Flight Center (United States)
Kuo-chia Liu, NASA Goddard Space Flight Center (United States)
Catherine T Marx, NASA Goddard Space Flight Center (United States)
Marzouk Marzouk, Sigma Space Corporation (United States)
Carson S McDonald, Edge Space Systems, Inc (United States)
Seke G Godo, NASA Goddard Space Flight Center (United States)
Mark E Melton, NASA Goddard Space Flight Center (United States)
James Mondello, Harris Corp., Space and Intelligence Systems (United States)
M. Charley Noecker, Jet Propulsion Laboratory, California Institute of Technology (United States)
Bert A Pasquale, NASA Goddard Space Flight Center (United States)
Hume L Peabody, NASA Goddard Space Flight Center (United States)
Ilya Y Poberezhskiy, Jet Propulsion Laboratory, California Institute of Technology (United States)
Cory A Powell, NASA Goddard Space Flight Center (United States)
Giulio G Rosanova, ATA Aerospace, Inc. (United States)
John A Ruffa, NASA Goddard Space Flight Center (United States)
Jeffrey S Smith, NASA Goddard Space Flight Center (United States)
Hong Tang, Jet Propulsion Laboratory, California Institute of Technology (United States)
Christopher S Tolman, Genesis Engineering Solutions (United States)
Arthur L Whipple, Conceptual Analytics, Inc. (United States)
Timothy J Wilson, Harris Corp., Space and Intelligence Systems (United States)
Melissa F Vess, NASA Goddard Space Flight Center (United States)
Perry Voyer, Harris Corp., Space and Intelligence Systems (United States)


Published in SPIE Proceedings Vol. 10698:
Space Telescopes and Instrumentation 2018: Optical, Infrared, and Millimeter Wave
Makenzie Lystrup; Howard A. MacEwen; Giovanni G. Fazio; Natalie Batalha; Nicholas Siegler; Edward C. Tong, Editor(s)

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