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Paper: The Balloon Experimental Twin Telescope for Infrared Interferometry
Volume: 430, Pathways Towards Habitable Planets
Page: 524
Authors: Rinehart, S. A.; The BETTII Team
Abstract: Astronomical studies at infrared wavelengths have dramatically improved our understanding of the universe, and Herschel and SOFIA will continue to provide exciting new discoveries. However, the relatively low angular resolution of these missions limits our ability to answer key science questions. Interferometry enables high angular resolution at long wavelengths - a powerful tool for scientific discovery. We will build the Balloon Experimental Twin Telescope for Infrared Interferometry (BETTII), and eight-meter baseline Michelson stellar interferometer to fly on a high-altitude balloon. BETTII, using a double-Fourier technique, will simultaneously obtain spatial and spectral information. Further, BETTII will serve as a technological pathfinder for future space-based interferometers such as FKSI, TPF-I, and Darwin.
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