Correction procedure of Eros NIS spectra. Left: NIS Eros spectra used in this study before correction (black) and their mean (blue-red curve). Middle: Ground-based Eros spectrum. Right: Corrected NIS spectra (black) with their mean (blue-red curve). The blue curve corresponds to wavelengths where no correction was applied while the red curve is in the corrected InGaAs spectral part.