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24 February 2003 The SPEAR science payload
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The SPEAR micro-satellite payload consists of dual imaging spectrographs optimized for detection of the faint, diffuse FUV (900-1750 Å) radiation emitted from interstellar gas. The instrument provides spectral resolution, R~750, and long slit imaging of <10' over a large (8°x5') field of view. We enhance the sensitivity by using shutters and filters for removal of background noise. Each spectrograph channel uses identically figured optics: a parabolic-cylinder entrance mirror and a constant-ruled ellipsoidal grating. Two microchannel plate photon-counting detectors share a single delay-line encoding system. A payload electronics system conditions data and controls the instrument. We will describe the design and predicted performance of the SPEAR instrument system and its elements.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Eric J. Korpela, Jerry Edelstein, Peter Berg, Mark Shane Bowen, Raymond Chung, Michael Feuerstein, Wonyong Han, Jeffrey S. Hull, Ho Jin, Dae-hee Lee, Kyung-wook Min, Uk-won Nam, Kaori Nishikida, Jin-geun Rhee, Kwangsun Ryu, Kwangil Seon, Barry Y. Welsh, and Insoo Yuk "The SPEAR science payload", Proc. SPIE 4854, Future EUV/UV and Visible Space Astrophysics Missions and Instrumentation, (24 February 2003);


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