Summary of NGS AO engineering requests to the ETAC:

We had a meeting on Friday April 16, 2004

Attendees:

-        Erik J., Randy C., Marcos v. D., Antonin B. and David L.M.

-        DLM and Peter W. had a discussion following the meeting.

Priority 1 requests below are in support of NIRC2 performance documentation.

Priority 2 requests below are in support of AO/NIRC2 performance documentation for the AO handover.

Priority 3 requests support some of the aspects of AO performance. Below follow some notes about those:

-        The emissivity study does not require a well-phased telescope and could be done on PCS night (when/if eng. time is available)

-        The coronagraphy project has been stopped because of the AO rotator pupil alignment problem. We want to resume it. See dlm’s web page for coronagraphy results to date.

-        The impact of atmospheric dispersion for shorter wavelength has never been measured and was included in our list after discussion with Peter.

Priority 4 requests are in support of LGS integration. Those are NGS tasks that do not require the Laser. If engineering time is available, we would be happy to perform these tests. 

Priority	In support of	Test Description	Lead	Requested Time (h)	When
1	NIRC2 performance	Spectro-photometry Z0	RC	2h	asap
2	AO performance	Bright star 2.4” vs lambda	MvD, DLM	1h x 2	asap
2	AO performance	Bright Star 2.4” vs airmass	MvD, DLM	1h x 2	asap
2	AO Performance	Faint star 1.0”	MvD, DLM	1.5h x 2	> october
2	AO Performance	Release of new TT code	EJ, MvD, DLM	1h	> june
3	AO Performance	Gain and spot size optimization	MvD, DLM	3h	>?
3	AO Performance	anisoplanatism	AB	1h x 2	asap
3	NIRC2/AO performance	Inst. emissivity (K, Lp & Ms)	AB, RC	1h	asap
3	NIRC2 performance	Coronagraphy performance w/ new alignment	DLM, RC	4h	asap
3	NIRC2/ AO performance	DAR / NGS (nirc2 drift, spectral type, spot size dependency, operations)	RC, AB. MvD	2h	> june
3	NIRC2/AO performance	Amplitude of lambda dispersion (narrow band vs broad band)	DLM, RC	1h	asap
4	LGS AO integ.	DAR / LGS	RC, PS	2h	> june
4	LGS AO integ	STRAP integ.	EJ, DLM	2h	> june
4	LGS AO integ	STRAP diaphragm	AB	0.5h	asap