The MICADO first light imager for the ELT: off-axis performance of PSF reconstruction

TL;DR

This paper presents a novel off-axis PSF reconstruction method for MICADO@ELT using temporal tomography of AO telemetry, achieving 10-15% accuracy in Strehl ratio and FWHM, enhancing adaptive optics observations.

Contribution

It introduces a new off-axis PSF reconstruction technique based on temporal tomography, extending MICADO's capabilities for multi-conjugated AO systems.

Findings

Achieves 10-15% accuracy in Strehl ratio and FWHM at half isoplanatic angle.

Demonstrates effectiveness on simulated and real data.

Paves the way for multi-conjugated AO PSF reconstruction.

Abstract

The highest scientific return, for adaptive optics (AO) observations, is achieved with a reliable reconstruction of the PSF. This is especially true for MICADO@ELT. In this presentation, we will focus on extending the MICADO PSF reconstruction (PSF-R) method to the off-axis case. Specifically, a novel approach based on temporal-based tomography of AO telemetry data has been recently implemented. Results from the PSF-R of both simulated and real data show that, at half isoplanatic angle distances, a precision of about 10-15% is achievable in both Strehl ratio and full-width at half maximum, paving the way to extend the MICADO PSF-R tool also to the multi-conjugated AO case.