== P3.12	Astrometry plate scale and orientation == 

- **Phase**		:	3  
- **Status**		: 	Draft	 
- **Category**	: 	Nighttime testing (functionality and operability) (C5) + Nighttime calibration (C6)
- **Recurrence**	: 	every night starting from commissioning
- **Duration**	: 	2 hours

**Description**
- Determine the astrometry of the science frame. Deduce detector on sky coordinates & plate scale from RA & DEC of known multiple stellar systems. This calibration is to be done for a reference setup. 

**Prerequisites**
- Authorize SHARK-NIR on the SX side.
- Atmospheric conditions: AO working conditions.
- Bad pixel map, Background or Dark, Flat-field, distortion map 

**Procedure**
- Observe multiple systems with known characteristics without the coronagraph 

**Templates**
- SHARKNIR_cal_Astrometry (not released)

**Success criteria**
- Image scale better than 5 mas (goal 0.5 mas) over FoV, image orientation better than 3 arcmins (goal 18 arcsec) 

**Notes**
- Same as activity 7.1 in AD4

**LBTO support**
- AO support

**Date performed and by whom**