Dr Andreas Ullrich is chief technical officer and managing director of RIEGL Laser Measurement Systems, which he has been working since 1991. He holds a PhD in Electrical Engineering from Vienna University of Technology and wrote a thesis on ‘High-Resolution Optical Doppler Radar’ (1987-1990). Since 2001 he has been a lecturer on radar technology at the Institute of Communications and Radio-Frequency Engineering at Vienna University of Technology.