4 August 2016 Recent experiments conducted with the Wide-field imaging interferometry testbed (WIIT)
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Abstract
The Wide-field Imaging Interferometry Testbed (WIIT) was developed at NASA’s Goddard Space Flight Center to demonstrate and explore the practical limitations inherent in wide field-of-view “double Fourier” (spatio-spectral) interferometry. The testbed delivers high-quality interferometric data and is capable of observing spatially and spectrally complex hyperspectral test scenes. Although WIIT operates at visible wavelengths, by design the data are representative of those from a space-based far-infrared observatory. We used WIIT to observe a calibrated, independently characterized test scene of modest spatial and spectral complexity, and an astronomically realistic test scene of much greater spatial and spectral complexity. This paper describes the experimental setup, summarizes the performance of the testbed, and presents representative data.
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David T. Leisawitz, Roser Juanola-Parramon, Matthew Bolcar, James R. Fienup, Alexander S. Iacchetta, Stephen F. Maher, Stephen A. Rinehart, "Recent experiments conducted with the Wide-field imaging interferometry testbed (WIIT)", Proc. SPIE 9907, Optical and Infrared Interferometry and Imaging V, 99070U (4 August 2016); doi: 10.1117/12.2231789; https://doi.org/10.1117/12.2231789
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