Simulation and image reconstruction of IFU-spectrometer data from JWST-MIRI
2010
The Mid Infrared Instrument of the James Webb Space Telescope is equipped with an integral field unit (IFU)
spectrometer. The optical distortion in the image slicing and dispersive optics leads to non-uniform sampling
and a catenation of the spatial and spectral information on the detector plane. To enable the translation of
detector data to the three-dimensional data cube representing the two spatial and the spectral sky dimension,
we have built two software tools: The first is miri cube, an image reconstruction programme which translates
the detector data back into the sky cube. The second is an extended version of SpecSim, an IFU simulator which
simulates the image slicing and dispersion based on optical models of the instrument. With these tools we are
able to determine and implement the correct strategy for the end-to-end calibration of spectroscopy data during
the on-ground cryogenic test campaign.
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