Influence of restricted FOV and CCD binning in SH-WFS on the performance of NAOMI
Sochting, IK Wilson, R Myers, R Longmore, A Benn, C Ostensen, Roy Els, S Goodsell, S Gregory, T Talbot, G #
Spie-int soc optical engineering
Advancements in adaptive optics, pts 1-3 vol:5490 pages:574-579
PROCEEDINGS OF THE SOCIETY OF PHOTO-OPTICAL INSTRUMENTATION ENGINEERS (SPIE)
Conference on Advancements in Adaptive Optics Glasgow, SCOTLAND, JUN 21-25, 2004
Using a unique combination of empirical data collected simultaneously by the science camera (INGRID) and the wave front sensor in NAOMI plus the same night profiles of the turbulent layers measured by SLODAR, we discuss the accuracy of the analytic approach to modelling of AO performance. The WFS frames recorded for different atmospheric conditions allow us to make a detailed investigation of the influence of a restricted field of view and sampling of the WFS on the accuracy of the centre of gravity and its propagation to the residual variance. The predictions of Strehl, FWHM and FWHE derived for NAOMI+INGRID using our analytic approach are compared with on-sky performance demonstrated during the commissioning and science observations with NAOMI.