The European Space Agency (ESA) is Europe’s gateway to space. Its mission is to shape the development of Europe’s space capability and ensure that investment in space continues to deliver benefits to the citizens of Europe and the world.
Find out more about space activities in our 23 Member States, and understand how ESA works together with their national agencies, institutions and organisations.
Exploring our Solar System and unlocking the secrets of the Universe
Go to topicProtecting life and infrastructure on Earth and in orbit
Go to topicUsing space to benefit citizens and meet future challenges on Earth
Go to topicMaking space accessible and developing the technologies for the future
Go to topicThe Space Radiation Environment Monitor (SREM) instrument provides data on the space weather conditions in the vicinity of the spacecraft and has already been flown on several ESA missions, including Integral (studying the solar particles and the Van Allen radiation belts in a highly eccentric orbit).
SREMs measure space radiation fluxes and the ‘radiation dose’, or the amount of energy from radiation absorbed by materials, counting energetic electrons, protons and heavy ions encountered during each mission.