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Proceedings Paper

Next-Generation Space Telescope (NGST) system engineering trades
Author(s): Michael J. Wehner; Stewart L. Moses; Charles F. Lillie; Elizabeth D. Johnson
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Paper Abstract

The Next Generation Space Telescope is intended to extend man's ability to observe the history of the universe to the time when galaxies were first forming. TRW is being funded by NASA to develop mission architectures that can achieve this and other science goals, while still remaining within a rigid cost cap. This paper presents the trade considerations for selecting the optimum NGST architecture. Mission architectures consist of combinations of technologies and mission design elements including different orbits and launch vehicles, aperture sizes, the wavelength bands, thermal control approaches, and observatory configurations. The systems engineering analyses involve defining and assessing the trade spaces for each possible architecture. For example, primary mirror approaches include single-piece, monolithic mirrors of about four meters diameter to much larger segmented mirrors employing advanced deployable technology. The performance of different configurations and mission architectures will be evaluated via end-to-end modeling, so that science utility will be balanced against system cost and risk for each technology. The trades presented suggest optimum directions for further NGST system studies.

Paper Details

Date Published: 28 August 1998
PDF: 5 pages
Proc. SPIE 3356, Space Telescopes and Instruments V, (28 August 1998); doi: 10.1117/12.324504
Show Author Affiliations
Michael J. Wehner, TRW, Inc. (United States)
Stewart L. Moses, TRW, Inc. (United States)
Charles F. Lillie, TRW, Inc. (United States)
Elizabeth D. Johnson, TRW, Inc. (United States)

Published in SPIE Proceedings Vol. 3356:
Space Telescopes and Instruments V
Pierre Y. Bely; James B. Breckinridge, Editor(s)

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