iss051e051544 (5/29/2017) --- European Space Agency (ESA) astronaut Thomas Pesquet holds a Mobile Unit in the Columbus European Laboratory during European Space Agency (ESA)-Active-Dosimeters experiment operations (OPS). The European Crew Personal Active Dosimeter (EuCPAD) project tests an active radiation dosimeter system. This represents the first time that crews wear active dosimeters in order to measure changes in radiation exposure over time providing variation of radiation dose data with respect to ISS orbit and altitude, solar cycle, and solar flares.
Photographer Thomas Pesquet
Date May 29, 2017