Layer-oriented MCAO projects and experiments: an update

We are currently working on four projects employing Multi Conjugate Adaptive Optics in a Layer-Oriented fashion. These ranges from experimental validations, to demonstration faci lity or full instrument to be offered to an astronomical community and involves telescopes in the range of 4m to 24m equivalent telescope aperture. The current status of these projects along with their brief description is here given. : Multi-Conjugate Adaptive Optics systems, Layer oriented MCAO, Wavefront Sensors.