Proba-3’s main corona-observing ASPIICS (Association of Spacecraft for Polarimetric and Imaging Investigation of the Corona of the Sun) instrument, hosted on the Coronagraph spacecraft, will be overseen by the Royal Observatory of Belgium.

The mission’s Occulter spacecraft, fitted with a 1.4-m disk, is tasked with blocking out of the Sun for the Coronagraph spacecraft during active formation flying. It carries its own instrument on the Sunward side, DARA (Davos Absolute Radiometer) to measure the Sun’s total energy output for climate studies, developed by the Physical Meteorological Observatory. PMOD, in Davos, Switzerland.