E-Mail IMAGE: The KIT-developed data recorder uses a GPS receiver and records raw and frequency data with very high resolution. (Photo: Amadeus Bramsiepe, KIT) view more Credit: Amadeus Bramsiepe, KIT In the renewable energies era, grid frequency will be an increasingly important indicator of stability of power supply. Under the direction of the Helmholtz Association, an interdisciplinary research consortium has analyzed frequency fluctuations in twelve synchronous grid areas on three continents. For data recording, scientists of Karlsruhe Institute of Technology (KIT) have developed a portable, GPS-synchronized recorder based on a new measurement technology. First results have now been published in