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Proceedings Paper

Wide-field imaging interferometry spatial-spectral image synthesis algorithms
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Paper Abstract

The Wide-Field Imaging Interferometry Testbed (WIIT) is a wide-field spectral imaging Michelson interferometer developed at the NASA/Goddard Space Flight Center. WIIT is operational and effectively demonstrates imaging and spectroscopy over fields-of-view larger than the narrow primary beam footprint of a conventional Michelson interferometer. At the heart of this technique is the "double-Fourier" approach whereby the apertures and a delay line are both moved to collect interferograms over a 2D wide field detector grid simultaneously; one interferogram per detector pixel. This aggregate set of interferograms, as a function of baseline and delay line, is algorithmically processed to construct a single spatial-spectral cube with angular resolution approaching the ratio of the wavelength to the longest baseline. Herein we develop the mathematical spatial-spectral imaging model and the baseline processing algorithm and show results using simulated data and using WIIT testbed data.

Paper Details

Date Published: 12 September 2012
PDF: 11 pages
Proc. SPIE 8445, Optical and Infrared Interferometry III, 84450B (12 September 2012); doi: 10.1117/12.926920
Show Author Affiliations
R. G. Lyon, NASA Goddard Space Flight Ctr. (United States)
D. T. Leisawitz, NASA Goddard Space Flight Ctr. (United States)
S. A. Rinehart, NASA Goddard Space Flight Ctr. (United States)
N. Memarsadeghi, NASA Goddard Space Flight Ctr. (United States)
E. Sinukoff, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 8445:
Optical and Infrared Interferometry III
Françoise Delplancke; Jayadev K. Rajagopal; Fabien Malbet, Editor(s)

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