German space research activities range from experiments under conditions of weightlessness to the exploration of other planets and environmental monitoring from space. In addition to these activities, DLR performs tasks of public authority pertaining to the planning and implementation of the German space programme, in its capacity as the official space agency of the Federal Republic of Germany. DLR's Project Management Agency (German: "Projektträger im DLR") has also been entrusted with tasks of public authority pertaining to the administration of subsidies. In the field of energy research, DLR is working on highly efficient, low- power generation technologies based on gas turbines and fuel cells, on solar thermal power generation, and on the efficient use of heat, including cogeneration based on fossil and renewable energy sources. The topics covered by DLR's transportation research are maintaining mobility, protecting the environment and saving resources, and improving transportation safety. In addition to the already existing projects Mars Express, global navigation satellite system Galileo, and Shuttle Radar Topography Mission, the Institute of Space Systems (German: "Institut für Raumfahrtsysteme") was founded in Bremen on 26 January 2007. In the future, 80 scientists and engineers will be doing research into topics such as space mission concepts, satellite development and propulsion technology. The High Resolution Stereo Camera HRSC is the most important German contribution to the European Space Agency's Mars Express mission. It is the first digital stereo camera that also generates multispectral data and that has a very high resolution lens. The camera records images of the Martian surface which formed the basis for a large number of scientific studies. With the HRSC, which was developed at the German Aerospace Center's Institute of Planetary Research (German: "Institut für Planetenforschung"), it is possible to analyse details no larger than 10 to 30 meters in three dimensions. The comet orbiter "Rosetta" is controlled from the European Space Operations Centre (ESOC), in Darmstadt, Germany. The DLR has provided the structure, thermal subsystem, flywheel, the Active Descent System (procured by DLR but made in Switzerland), ROLIS, downward-looking camera, SESAME, acoustic sounding and seismic instrument for "Philae", the orbiter's landing unit. It has also managed the project and did the level product assurance. The University of Münster built MUPUS (it was designed and built in Space Research Centre of Polish Academy of Sciences) and the Braunschweig University of Technology the ROMAP instrument.