The European Space Agency (ESA) offers a wide range of Earth observation data. How to obtain them for your own use depends on the type of data required. The Earth Observation Principal Investigator Portal offers free Earth observation datasets, the access is granted after user registration. Other data, the so called restrained dataset, are products free of charge as well but are generated only after specific user requests have been filed through the same portal. Through the Multi-mission Earth Observation Portal a wide variety of Earth observation resources can be found. Besides, ESA also offers a list of its products organized by satellite and instrument or by application and processing level.
How to obtain ESA Earth Observation data