Observing through the atmospheric turbulence

Adaptive optics is used to recover diffraction limited resolution with ground based large telescopes by compensating in real time atmospheric turbulence A study is presented to understand the different problems that occur such as the laser beams propagation through atmospheric turbulence the ground to satellite communication where adaptive phase corrections based on one link are applied to the other or when imaging of extended sources is attempted from the ground through high altitude turbulence Methods are suggested to increase the confidence level of the detection of faint astronomical objects such as the search from stellar occultations by small objects or to detect the perturbations induced by the scintillation variations compared to those induced by the phase variations for direct exo planet observation from the groundRefreshments are served at 3:20pm