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Fast steering mirror disturbance effects on overall system optical performance for the Large Ultraviolet/Optical/Infrared Surveyor (LUVOIR) concept using a non-contact vibration isolation and precision pointing system
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Paper Abstract

As the optical performance requirements of space telescopes get more stringent, the need to analyze all possible error sources early in the mission design becomes critical. One large telescope with tight performance requirements is the Large Ultraviolet / Optical / Infrared Surveyor (LUVOIR) concept. The LUVOIR concept includes a 15-meter-diameter segmented-aperture telescope with a suite of serviceable instruments operating over a range of wavelengths between 100nm to 2.5um. Using an isolation architecture that involves no mechanical contact between the telescope and the host spacecraft structure allows for tighter performance metrics than current space-based telescopes being flown. Because of this separation, the spacecraft disturbances can be greatly reduced and disturbances on the telescope payload contribute more to the optical performance error. A portion of the optical performance error comes from the disturbances generated from the motion of the Fast Steering Mirror (FSM) on the payload. Characterizing the effects of this disturbance gives insight into FSM specifications needed to achieve the tight optical performance requirements of the overall system. Through analysis of the LUVOIR finite element model and linear optical model given a range of input disturbances at the FSM, the optical performance of the telescope and recommendations for FSM specifications can be determined. The LUVOIR observatory control strategy consists of a multi-loop control architecture including the spacecraft Attitude Control System (ACS), Vibration Isolation and Precision Pointing System (VIPPS), and FSM. This paper focuses on the control loop containing the FSM disturbances and their effects on the telescope optical performance.

Paper Details

Date Published: 9 September 2019
PDF: 9 pages
Proc. SPIE 11115, UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX, 1111512 (9 September 2019); doi: 10.1117/12.2530647
Show Author Affiliations
Lia W. Sacks, NASA Goddard Space Flight Ctr. (United States)
Christine Collins, NASA Goddard Space Flight Ctr. (United States)
Gregory Walsh, NASA Goddard Space Flight Ctr. (United States)
Michael Eisenhower, Smithsonian Astrophysical Observatory (United States)
James Corsetti, NASA Goddard Space Flight Ctr. (United States)
Garrett West, Ball Aerospace (United States)
Joseph Howard, NASA Goddard Space Flight Ctr. (United States)
Sang Park, Smithsonian Astrophysical Observatory (United States)
Matthew R. Bolcar, NASA Goddard Space Flight Ctr. (United States)
Jason E. Hylan, NASA Goddard Space Flight Ctr. (United States)
Julie A. Crooke, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 11115:
UV/Optical/IR Space Telescopes and Instruments: Innovative Technologies and Concepts IX
Allison A. Barto; James B. Breckinridge; H. Philip Stahl, Editor(s)

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