From within the UltraDAS system (the console with the OBS> prompt), you can select different observing modes for LIRIS. These save time, since the various LIRIS wheels are moved simultaneously. Besides, the best configurations for imaging, spectroscopy etc. are chosen automatically, thus significantly reducing the number of possible error sources during night time operation. An overview of the currently available, predefined modes is given below.

NOTE: For all LIRIS observations North is up and East is left for PA=0°.

		Imaging mode:   limage <option>
		Option	Slit wheel	Filter wheel 1	Filter wheel 2	Pupil wheel	Grism wheel
		y	clear	clear	y	pshortbr	clear
		z	clear	clear	z	pshortbr	clear
		j	clear	clear	j	pshortbr	clear
		h	clear	clear	h	pshortbr	clear
		ks	clear	clear	ks	pcblnkxl	clear
		brg	clear	clear	brg	pcblnkxl	clear
		kc	clear	clear	kc	pcblnkxl	clear
		h2_10	clear	h2v10	clear	pcblnkxl	clear
		h2_10_ks	clear	h2v10	ks	pcblnkxl	clear
		h2_21	clear	h2v21	clear	pcblnkxl	clear
		h2_21_ks	clear	h2v21	ks	pcblnkxl	clear
		he1	clear	clear	he1	pcblnkxl	clear
		hc	clear	hc	clear	plongmidu	clear
		jc	clear	jc	clear	pcentnr	clear
		hc_h	clear	hc	h	plongmidu	clear
		fe2	clear	fe2	clear	plongmidu	clear
		fe2_h	clear	fe2	h	plongmidu	clear
		ch4	clear	ch4	clear	plongmidu	clear
		pab	clear	pabeta	clear	pcentnr	clear
		Spectroscopic mode:   lspec <option> <option: slit>
		Option	Slit wheel	Filter wheel 1	Filter wheel 2	Pupil wheel	Grism wheel
		lr_zj	slit?	clear	clear	pshortbr	rzj
		lr_hk	slit?	clear	hkspec	pcblnkxl	rhk
		hr_j	slit?	clear	clear	pshortbr	hrj
		hr_h	slit?	clear	hkspec	pshortbr	hrh
		hr_k	slit?	clear	hkspec	pcblnkxl	hrk
		The slit wheel is not moved unless you give the name of the slit mask as an additional, second argument. Alternatively, the desired slit mask can be inserted separately with lslit <slit mask name> Available slit masks
		Coronographic mode:   lcor <option>
		Option	Slit wheel	Filter wheel 1	Filter wheel 2	Pupil wheel	Grism wheel
		y	cor	clear	y	pcoron	clear
		z	cor	clear	z	pcoron	clear
		j	cor	clear	j	pcoron	clear
		h	cor	clear	h	pcoron	clear
		ks	cor	clear	ks	pcoron	clear
		brg	cor	clear	brg	pcoron	clear
		kc	cor	clear	kc	pcoron	clear
		h2_10	cor	h2v10	clear	pcoron	clear
		h2_10_ks	cor	h2v10	ks	pcoron	clear
		h2_21	cor	h2v21	clear	pcoron	clear
		h2_21_ks	cor	h2v21	ks	pcoron	clear
		he1	cor	clear	he1	pcoron	clear
		hc	cor	hc	clear	pcoron	clear
		hc_h	cor	hc	h	pcoron	clear
		fe2	cor	fe2	clear	pcoron	clear
		fe2_h	cor	fe2	h	pcoron	clear
		ch4	cor	ch4	clear	pcoron	clear
		jc	cor	jc	clear	pcoron	clear
		pab	cor	pab	clear	pcoron	clear
		Polarimetry mode:   lipol
		Option	Slit wheel	Filter wheel 1	Filter wheel 2	Pupil wheel	Grism wheel
		y	clear	clear	y	pshortbr	wdw_image
		z	clear	clear	z	pshortbr	wdw_image
		j	clear	clear	j	pshortbr	wdw_image
		h	clear	clear	h	pshortbr	wdw_image
		ks	clear	clear	ks	pcblnkxl	wdw_image
		kc	clear	clear	kc	pcblnkxl	wdw_image
		hc	clear	hc	clear	plongmidu	wdw_image
		jc	clear	jc	clear	pcentnr	wdw_image
		Calibration / other:   lblanks
		wheel:	Slit wheel	Filter wheel 1	Filter wheel 2	Pupil wheel	Grism wheel
		value:	blank	hc	kc	blank	rzj