Maria Barrera Verdejo and Rainer Haseneder-Lind traveled from University of Cologne to Athens for installing the Microwave Radiometer (MWR) in the terrace of NTUA close to the Raman lidar for the HygrA-CD campaign. Thanks to Maria and Rainer, the MWR, named ACRHAT after ACROPOLIS, has been running continuously since May 9th when it was actually calibrated.