The Institute of Solar-Terrestrial Physics at the German Aerospace Center, founded in 2019, aims to create the scientific and technological capability to provide timely, accurate and reliable space weather observations and predictions. The institute research covers the state and dynamics of the Ionosphere-Thermosphere-Magnetosphere System and it´s driving by the Sun and by the lower and middle atmosphere. The institute covers both basic research and its development towards user-relevant products to increase the resilience of critical technological infrastructures to space weather impacts. The Ionosphere Monitoring and Prediction Center operated by the institute provides near real-time ionosphere monitoring and predictions of ionospheric conditions to support satellite-based navigation and communication. The presentation will provide a brief overview about the structure of the institute with its observational, research and operational capabilities