== P2.6 Tip-Tilt internal fast loop test with ASM turbulence == 

- **Phase**		:	2  
- **Status**		: 	Draft	 
- **Category**	: 	Daytime testing (functionality and operability) (C3)
- **Recurrence**	: 	after instrument installation at telescope platform
- **Duration**	: 	0.5 day

**Description**
- To verify the SHARK-NIR internal fast tip-tilt loop (using CRED1 and SHARK-NIR ALPAO DM) using the ARGOS light source (only at zenith) for various seeing conditions simulated at the ASM.

**Prerequisites**
- Knowledge of Argos light source magnitude and the possibility to tune its brightness.

**Procedure**
- Use ARGOS light source (to be used only at zenith) and direct light towards SHARK-NIR.
- Close the SOUL AO loop to have the best ASM shape. Keep the ASM static with the best shape.
- Close the SHARK-NIR internal tip-tilt loop.
- Take 10mins of data at the CRED2 and SCICAM.
- Introduce 0.5" seeing at the ASM and close the loop.
- Close the SHARK-NIR internal tip-tilt loop.
- Take 10mins of data at the CRED2 and SCICAM.
- Introduce 0.8" seeing at the ASM and close the loop.
- Close the SHARK-NIR internal tip-tilt loop.
- Take 10mins of data at the CRED2 and SCICAM.
- Repeat the above steps for the selected brightness of the Argos light source

**Templates**

**Success criteria**
- SHARK-NIR fast tip-tilt loop working efficiently within the requirements in all the seeing conditions.

**Notes**
- For the SN team: know in advance how many minutes of data can be downloaded from CRED2 or the ring-buffer size.

**LBTO support**
- Authorize SHARK-NIR
- Permission to use SX-ASM and LBTI-AO
- AO support

**Date performed and by whom**