2018 Nov 26 - Dec 14

GNIRS was removed from the telescope to work on filter wheel #2 which had been showing increasing instances of not going into position reliably. The filter wheel datum switches were replaced on both filter mechanisms, a temporary light baffle was removed from wheel #1, and dust was removed from the filters using CO2 snow.

2018 Jun 20-25

Re-seated the detector controller boards, replaced the sequencer board, and replaced a voltage regulator. The read noise levels are now back to normal.

2018 Jun 5