SENTINEL-2 satellite is for optical Earth monitoring as the second member of the ASTRIUM (nowadays AIRBUS DEFENSE & SPACE) Copernicus (formerly GMES: Global Monitoring for Environment and Security) set where Sentinel unit runs a high resolution Multi-Spectral Imaging Instrument (MSI). Optical sensors ranging a wide spectrum (0.4-2.4 µm) at a resolution around 10 meters scan a 290 km wide zone simultaneously at a 786 km orbit. Light from each scanned ‘dot’ will face several sensors (13 channels), separate in the visible and infrared ranges. Positioning tools will drive optics to aim with 20m (on surface) precision. Two Sentinel-2 satellites synchronized (with constantly altered orbit) can cover most of land surfaces every five days, while cloudless clear record is probable in every 22 days. The ensemble analysis of the spectral channels will provide vital data on the atmosphere, waterfront movements, water and chlorophyl content of greenery, volcanic phenomena and human influence. ADMATIS designed and procured mechanical and thermal equipments for MSI such as brackets for electronics (with radiators), thermal shields and baffles. The twin-satellites will serve the ESA and EU after 2012 from seven to twelve years.
