The Institut d'Astrophysique Spatiale (IAS) is a laboratory of the CNRS (the French National Centre for Scientific Research ) and of Université Paris-Saclay. Together with GEOPS (Géosciences Paris Saclay) and AIM (Astrophysique Instrumentation Modélisation / DAp), they constitute the OSUPS (Observatoire des Sciences de l'Univers de l'Université Paris-Saclay). The main research themes at the IAS are: solar physics, solar system and extrasolar planets, extraterrestrial and interstellar matter, galaxies and cosmology. The institute is heavily involved in space instrumentation and has a large Research and Development (R&D) program. The IAS is a major partner for space agencies, national (CNES), or international (ESA, NASA), and works with many industrial partners. The scientific and technical teams of the IAS conceive instruments for, and exploit data from CNES, ESA and sometimes NASA space missions. Several space projects can be managed simultaneously by the IAS: the institute drives the conception and development of instruments, tests them and characterizes their operation. For this, the institute possesses a large technical infrastructure. The IAS manages a national facility for the calibration of space experiments. In a controlled cleanliness environment, it includes a set of space simulators for the calibration of instruments and space environment tests. Moreover, in collaboration with the CEA (French Alternative Energies and Atomic Energy Commission), the IAS is taking part in a project for a space simulator on the synchrotron “SOLEIL”. The data and operations centre of the IAS – IDOC: Integrated Data and Operation Center – is in charge of some of the operations of the solar mission SoHO, the Mars Express planetary mission, and those of the cosmology mission Planck. The centre also ensures the analysis, the archiving and the access, for the national and international community, to the data of missions in which the IAS took part.