Ground Layer Adaptive Optics: PSF effects on ELT scales

TL;DR

This paper investigates how Ground Layer Adaptive Optics (GLAO) behaves differently on Extremely Large Telescopes (ELTs) due to large field of view and guide star overlaps, affecting correction energy distribution.

Contribution

It identifies the causes of GLAO behavior changes at ELT scales and explains the impact of large field of view and guide star overlaps on correction performance.

Findings

GLAO correction behavior varies significantly at ELT scales.

Large field of view and guide star overlaps influence energy distribution.

Understanding these effects aids in optimizing ELT adaptive optics systems.

Abstract

On certain extent the behavior of the Adaptive Optics correction for Extremely Large Telescope scales with diameter size. But in Ground Layer Adaptive Optics the combined effect of a Large Field of View and the large overlap of Guide Stars pupil footprints at high atmospheric altitude introduces severe changes in the behavior of the correction returning a very different distribution of the energy going from known 8-10meter to 100m diameters. In this paper we identify the reasons and the ways of these different behaviors.