Thomas Berkefeld, Detlev Sprung, Karin Stein, Erik Sucher

We have measured the refractive index structure coefficient Cn2 at the VTT and GREGOR site for the past four years. We were using a laser scintillometer to measure free atmosphere Cn2 between the VTT and GREGOR towers, and anemometers on the GREGOR platform to measure localized seeing in the vicinity of the telescope. We present first results from these measurements and their comparison with seeing proxys derived from the GREGOR adaptive optics system GAOS.

Sebastian Hoch, Lars Bielak

We present the current status of the GREGOR Broadband Imager (BBI) and show first results from two observing campaigns in July/august and September 2016.

This presents the work plan for Work Package 7 on the developments for the EST Multi-Conjugate Adaptive Optics system.