The MIRI Medium-Resolution Spectrometer (MRS) is the only mid-IR Integral Filed Spectrograph on board the James Webb Space Telescope. It offers integral field spectroscopy at resolutions up to ~4000, between 4.9 and 28.8 μm using four different nested Integral Field Units up to 7.2″ × 7.9″ in size. This workshop is part of a series of conferences of meetings of the international MRS testing and calibration working group. With these periodic workshops we define commissioning activities and calibration products to deliver to guarantee the best scientific return of MRS. Continue reading →