SDN0011

SYSTEM DESIGN NOTE

SDN0011 - Instrument Configuration Summary

Prepared by	Date	Approved by	Date	Rev.	Rev Date
Jay Elias	4/23/99	N. Gaughan	4/23/99	a	4/29/99

This document is intended to provide a summary listing of possible configurations of GNIRS. It also provides a unique identifier for each configuration. In using the listing below, it is important to note that different filters, slit settings and grating tilts are not assigned unique identifiers. The configurations listed below are those which are considered to be scientifically most useful, and therefore those for which the instrument is required to operate without degraded performance. Other configurations that are possible might have use for diagnostics or for unusual science programs, but loss of performance (e.g., vignetting or reduced image quality) is acceptable.

Instrument Configurations 1

Acquisition Configurations

ID #	Name	Filter	Slit	Decker	Bypass	Prism	Grating	Camera
1	SBAcq	sorter 3-7	acquisition	acquisition	in	any	any	short blue
2	SRAcq	sorter 1-3^a						short red
3	LBAcq	sorter 3-7						long blue
4	LRAcq	sorter 1-3^a						long red

Notes:

^aAbility to read array with sorter #1 uncertain, not a requirement

Instrument Configurations 2

Spectroscopic Configurations

ID #	Name	Filter	Slit	Decker	Bypass	Prism	Grating	Camera
5	SB10	sorter 3-7	0.3 arcsec^b	100 arcsec	out	mirror	10.44^c	short blue
6	SB31						31.7
7	SB111						110.5
8	SBXD	broad-band		6 arcsec		short prism	31.7^d
9	SB10P	sorter 3-7		14.4 arcsec		Wollaston	10.44^c
10	SB31P						31.7
11	SB111P						110.5
12	SB10IFU		coarse IFU	6 arcsec IFU		mirror	10.44^c
13	SB31IFU						31.7
14	SB111IFU						110.5
15	SR10	sorter 1 & 2	0.3 arcsec	100 arcsec			10.44^c	short red
16	SR31						31.7
17	SR111						110.5
18	SR10P			14.4 arcsec		Wollaston	10.44^c
19	SR31P						31.7
20	SR111P						110.5
21	SR10IFU		coarse IFU	6 arcsec IFU		mirror	10.44^c
22	SR31IFU						31.7
23	SR111IFU						110.5
24	LB10	sorters 3-7	0.1 arcsec^b	50 arcsec			10.44	long blue
25	LB31						31.7
26	LB111						110.5
27	LB10XD	broad-band		3 arcsec		long prism	10.44^d
28	LB10P	sorters 3-7		14.4 arcsec		Wollaston	10.44
29	LB31P						31.7
30	LB111P						110.5
31	LB10IFU		fine IFU	1.1 arcsec IFU		mirror	10.44
32	LB31IFU						31.7
33	LB111IFU						110.5
34	LR10	sorters 1 & 2	0.1 arcsec^b	50 arcsec			10.44	long red
35	LR31						31.7
36	LR111						110.5
37	LR10P			14.4 arcsec		Wollaston	10.44
38	LR31P						31.7
39	LR111P						110.5
40	LR10IFU		fine IFU^e	1.1 arcsec IFU		mirror	10.44
41	LR31IFU						31.7
42	LR111						110.5

Notes:

^bSlit listed is width optimally sampled at detector; other widths can be used

^cSpectrum doe not fill entire detector width

^dGrating listed provides complete 0.9-2,5 m m spectrum; other gratings can be used

^eLong wavelength performance of fine IFU uncertain

In principle, any configuration can be used for diagnostic purposes. However, the two main optical diagnostics contemplated for the instrument are pupil viewing and focus tests. Note that, unlike the configurations listed in the two preceding tables, there are more variables in entries below.

Instrument Configurations 3

Regular Diagnostic Configurations

ID #

Name

Filter

Slit

Decker

Bypass

Prism

Grating

Camera

Pupil View