Lamb, Masen (University of Victoria/NRC Herzberg), Correia, Carlos (Laboratoire dAstrophysique de Marseille), Sauvage, Jean-Francois (ONERA), Veran, Jean-Pierre (NRC Herzberg), Andersen, David (NRC Herzberg)
In nights at Cerro Paranal where good seeing and low wind conditions are present, the PSF delivered to the focal plane of the SPHERE instrument has been shown to have significant errors, and have been aptly described as the ‘Low Wind Effect’ (LWE). We demonstrate here a method to quantify the LWE using experimental and on-sky data. We find single image phase diversity is a useful tool in quantifying the LWE and can be used to monitor this effect over the course of the night.
10.26698/AO4ELT5.0142- Proceeding PDF