== SDC3	Wavelength calibration == 

- **Phase**		:	Any  
- **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 are required.

** Templates**

**Success criteria**
- LRS: 10 nm (goal 5 nm), MRS: 1 nm. 

**Notes**
- Same as activity 7.10 in AD4

**LBTO support**

**Date performed and by whom**