== P3.23	Wavelength calibration == 
•	**Phase**		:	3  
•	**Status**		: 	Draft	 
•	**Category**		: 	Daytime calibration (C3)
•	**Recurrence**	: 	every night when LSS observing mode is used.
•	**Duration**		: 	10 minutes
**Description**
•	Determine the central wavelength of each pixel for the long split spectroscopy observing mode.
**Prerequisites**
•	Authorize SHARK-NIR on the SX side.
•	Atmospheric conditions: AO working conditions.
•	Bad pixel map, Background or Dark, Flat-field, distortion map 
**Procedure**
•	This calibration is performed illuminating the slit with the spectral calibration lamps with at least 5 known emission lines; background exposures with lamps switched off required.
**Success criteria**
•	LRS: 10 nm (goal 5 nm), MRS: 1 nm. 
**Notes**
•	Same as activity 7.10 in AD4
**LBTO support**
•	Support from LBTI/LBTO?
**Associated SHARK-NIR personnel**
•	JF, LM, MdP
**Date performed and by whom**