Share Email Print
cover

Proceedings Paper

Verification of the James Webb Space Telescope (JWST) wavefront sensing and control system
Author(s): Adam R. Contos; D. Scott Acton; Allison A. Barto; Laura A. Burns; James Contreras; Bruce Dean; Erin Elliott; Lee Feinberg; Karl Hansen; Bruce Hardy; William Hayden; J. Scott Knight; Paul A. Lightsey; Carl Starr; Joseph Sullivan
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

From its orbit around the Earth-Sun second Lagrange point some million miles from Earth, the James Webb Space Telescope (JWST) will be uniquely suited to study early galaxy and star formation with its suite of infrared instruments.[1] To maintain exceptional image quality using its 6.6 meter segmented primary mirror, wavefront sensing and control (WFS&C) is vital to ensure the optical alignment of the telescope throughout the mission. After deployment of the observatory structure and mirrors from the "folded" launch configuration, WFS&C is used to align the telescope[2], as well as maintain that alignment. WFS&C verification includes the verification of the software and its incorporated algorithms, along with the supporting aspects of the integrated ground segment, instrumentation, and telescope through increasing levels of assembly. The software and process are verified with the Integrated Telescope Model (ITM), which is a Matlab/Simulink integrated observatory model which interfaces to CodeV/OSLO/IDL. In addition to lower level testing, the Near-Infrared Camera[3] (NIRCam) with its wavefront sensing optical components is verified with the other instruments with a cryogenic optical telescope simulator (OSIM) before moving on to the final WFS&C testing in Chamber A at the Johnson Space Center (JSC) where additional observatory verification occurs.

Paper Details

Date Published: 12 July 2008
PDF: 13 pages
Proc. SPIE 7010, Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter, 70100S (12 July 2008); doi: 10.1117/12.786984
Show Author Affiliations
Adam R. Contos, Ball Aerospace & Technologies Corp. (United States)
D. Scott Acton, Ball Aerospace & Technologies Corp. (United States)
Allison A. Barto, Ball Aerospace & Technologies Corp. (United States)
Laura A. Burns, Space Telescope Science Institute (United States)
James Contreras, Ball Aerospace & Technologies Corp. (United States)
Bruce Dean, NASA Goddard Space Flight Ctr. (United States)
Erin Elliott, Ball Aerospace & Technologies Corp. (United States)
Lee Feinberg, NASA Goddard Space Flight Ctr. (United States)
Karl Hansen, Ball Aerospace & Technologies Corp. (United States)
Bruce Hardy, Ball Aerospace & Technologies Corp. (United States)
William Hayden, NASA Goddard Space Flight Ctr. (United States)
J. Scott Knight, Ball Aerospace & Technologies Corp. (United States)
Paul A. Lightsey, Ball Aerospace & Technologies Corp. (United States)
Carl Starr, Northrop Grumman Space Technologies (United States)
Joseph Sullivan, Ball Aerospace & Technologies Corp. (United States)


Published in SPIE Proceedings Vol. 7010:
Space Telescopes and Instrumentation 2008: Optical, Infrared, and Millimeter
Jacobus M. Oschmann; Mattheus W. M. de Graauw; Howard A. MacEwen, Editor(s)

© SPIE. Terms of Use
Back to Top