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We describe the optical and mechanical design of a simple hand-held near infrared spectrograph constructed
to produce observations of the spectrum of scrambled light from the Earth from aboard the International Space
Station. Observing the Earth in this manner simulates the changing perspective on an extra-solar terrestrial
planet observed as a point source by the Terrestrial Planet Finder. A Sensors Unlimited, Inc. SU320-M
InGaAs(0.86 - 1.72μm) camera detects the dispersed spectrum and outputs NTSC video to be recorded and
also permits frame grabbing. One of the three copies of the instrument is currently aboard the International
Space Station. The optical and mechanical design was conceived and executed by graduate and undergraduate
students at the University of Virginia.
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Srikrishna Kanneganti, Chan Park, Heather Hershley, Aaron Smith, Michael Skrutskie, John Wilson, Wes Traub, Charles Lam, Matthew Nelson, "A hand-held near-infrared slit spectrograph for Earth observations," Proc. SPIE 6265, Space Telescopes and Instrumentation I: Optical, Infrared, and Millimeter, 62653W (15 June 2006); https://doi.org/10.1117/12.672294