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       - Darks are manually taken with the instrument cube closed, the IGRINS fold mirror out of the beam, and the mirror cover closed. All lights in the dome must be off.

       - 'FlatOFFFlat OFF' frames are taken with the telescope pointed at the flat screen in the dome, the mirror cover open, the instrument cube open, and the IGRINS fold mirror in the beam.

       - 'FlatONFlat ON' frames are taken in the same orientation as the 'FlatOFFFlat OFF' but with the two 600 W flat lamps and all other lamps upstairsturned on. Do not use the LMI lamps.