Recent progress in the simulation and synthesis of Wide Field Imaging Interferometry Testbed (WIIT) data
Abstract
The Wide-field Imaging Interferometry Testbed (WIIT) is a double Fourier interferometer (DF) operating at optical wavelengths, and provides data that are highly representative of those from a space-based far-infrared interferometer like the Space Infrared Interferometric Telescope (SPIRIT). Developed at NASA’s Goddard Space Flight Center, this testbed produces high-quality interferometric data and is capable of observing spatially and spectrally complex hyperspectral test scenes, from geometrically simple to astronomically representative test scenes.Here we present the simulation of recent WIIT measurements using the Far-infrared Interferometer Instrument Simulator (FIInS). This simulation enables us to compare a synthesized spatial-spectral data cube based on FIInS-generated DF data with the input hyperspectral test scene. FIInS has been modified to perform the calculations at optical wavelengths and to include an extended field of view due to the presence of a detector array. The results from FIInS are compared with the results obtained from recent measurements with WIIT. For this current study, the test scene under consideration spatially consists of four reference point sources intended for spectral and spatial calibration, and six science sources, comprised of binary systems. Each binary pair member has a unique spectrum. Our results demonstrate that FIInS accurately describes the performance of a real double Fourier interferometer, and that the expected hyperspectral data cube can be reconstructed from synthetic or real interferometric data.
- Publication:
-
American Astronomical Society Meeting Abstracts #228
- Pub Date:
- June 2016
- Bibcode:
- 2016AAS...22812008J