Euclid is a space-based optical/near-infrared high precision and high accuracy survey mission of the European Space Agency (ESA) to investigate the nature of dark energy, dark matter and gravity by observing the geometry of the Universe and on the formation of structures over cosmological timescales. Euclid will mainly use two probes of the signature of dark matter and energy: Weak gravitational Lensing, which requires the measurement of the shape and photometric redshifts of distant galaxies, and Galaxy Clustering, based on the measurement of the 3-dimensional distribution of galaxies through their spectroscopic redshifts. The mission is scheduled for launch in 2022 and is designed for 6 years of nominal survey operations. The Euclid Spacecraft is composed of a Service Module and a Payload Module. The Service Module comprises all the conventional spacecraft subsystems, the instruments warm electronics units, the sun shield and the solar arrays. In particular the Service Module provides the extremely challenging pointing accuracy required by the scientific objectives. The Payload Module consists of a 1.2 m three-mirror Korsch type telescope and of two instruments, the visible imager "VIS" and the near-infrared spectro-photometer "NISP" both covering a large common field-of-view enabling to survey 15,000 sqd, more than 35% of the entire sky. All sensor data are downlinked using K-band transmission and processed by a dedicated ground segment for science data processing. The Euclid data and catalogues will be made available to the public at the ESA Science Data Centre. Euclid is currently undergoing to a Critical Design Review, a major milestone to prove the soundness of the mission design in all its aspects before manufacturing of flight hardware is fully deployed. We will also report on the expected mission performance following the latest simulations. This is based on the calculated and measured image quality parameters of the optical system which shows exceptional capability of the Euclid space observatory.
42nd COSPAR Scientific Assembly
- Pub Date:
- July 2018