The main interests of our research group are geodynamic phenomena and atmospheric processes. These topics include for example deformations of the earth’s crust due to mass redistribution, inter- and intra-plate tectonics, loading effects, and variations in earth orientation and rotation on sub-diurnal to decadal time scales. Other examples are the distribution and variation of the amount of atmospheric water vapour, atmospheric turbulence and climate monitoring. To study these research topics we perform observations with a variety of techniques and do corresponding theoretical work. The applied techniques include space geodetic and geophysical techniques, but also microwave radiometry and space-borne interferometric radar.