== P3.28	 Ghost calibration == 
•	**Phase**		:	3  
•	**Status**		: 	Draft	 
•	**Category**		: 	Daytime calibration (C3)
•	**Recurrence**	: 	once every 6 months, starting from commissioning.
•	**Duration**		: 	20 minutes per configurations x 2 derotator positions.
**Description**
•	Recording the ghost positions at contrast of <5x10^-7
**Prerequisites**
•	Bad pixel map, Background 
**Procedure**
•	Insert the point source lamp and acquires 2 exposures: the first one is a non-saturated exposure (DET.DIT and DET.NDIT), the second one is a saturated exposure.
**Success criteria**
•	Accuracy: Position: 0.5 pixel; Contrast: 5.10^-7.
**Notes**
•	Same as activity 9.5 in AD4
**LBTO support**
•	Support from LBTI/LBTO?
**Associated SHARK-NIR personnel**
•	JF, LM, MdP
**Date performed and by whom**