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The pre-launch characterization of SIMBIO-SYS/VIHI imaging spectrometer for the BepiColombo mission to Mercury. II. Spectral calibrations

2017; American Institute of Physics; Volume: 88; Issue: 9 Linguagem: Inglês

10.1063/1.4996857

1527-2400

F. Altieri, G. Filacchione, F. Capaccioni, Cristian Carli, Michele Dami, Leonardo Tommasi, Gianluca Aroldi, Donato Borrelli, Alessandra Barbis, Marco Baroni, Guia Pastorini, Iacopo Ficai Veltroni, R. Mugnuolo,

Infrared Target Detection Methodologies

The Visible and near Infrared Hyperspectral Imager (VIHI) is the VIS-IR spectrometer with imaging capabilities aboard the ESA BepiColombo mission to Mercury. In this second paper, we report the instrument spectral characterization derived by the calibration campaign carried out before spacecraft integration. Complementary measurements concerning radiometric and linearity responses, as well as geometric performances, are described in Paper I [G. Filacchione et al., Rev. Sci. Instrum. 88, 094502 (2017)]. We have verified the VIHI spectral range, spectral dispersion, spectral response function, and spectral uniformity along the whole slit. Instrumental defects and optical aberrations due to smiling and keystone effects have been evaluated, and they are lower than the design requirement (<1/3 pixel). The instrumental response is uniform along the whole slit, while spectral dispersion is well represented by a second order curve, rather than to be constant along the spectral dimension.