Diagram of Filter Wheel 1 Layout
Nirspec-1 (Y) 0.947-1.121
Nirspec-3 (J) 1.143-1.375
Nirspec-5 (H) 1.413-1.808
Nirspec-7 (K) 1.839-2.630
Diagram of Filter Wheel 2 Layout
Download spreadsheet of SPEC filter transmissions
Following the NIRSPEC Upgrade in Dec. 2018, filters are moved in four ways:
(1) Using the NIRSPEC Format Simulator (EFS) by selecting the desired filter and clicking "go" in setup mode.
(2) Using the NIRSPEC Mechanism GUI, by clicking on the Filter pull down and selecting a filter and stop.
(3) Using the command line to call a filter by name that gets paired to a 2nd default filter automatically. E.g. "filt m-wide", (sets m-wide and open, when not in AO), or "filt kl" (sets kl and ao-stop, if NIRSPAO)
(4) Using the command line to call a specific filter combination from each of the 2 science filter wheels. E.g "modify -s nsmotor scifilt1nam=open" & "scifilt2nam=nirspec-1"As part of the Fiber Extraction Unit capability, new pupil stops were added to each of the two science filters which now accompany the smaller apperture AO-stops: named feu-stop.
|Position||Motor Steps||Filter 1||Motor Steps||Filter 2|