Plasma Krystall-4 (PK-4): Today a crewmember initiated three runs for the group 2 of the PK-4 experiment and performed a hard drive change out for data downlink. PK-4 is a scientific collaboration between the ESA and the Roscosmos, performing research in the field of “Complex Plasmas”: low temperature gaseous mixtures composed of ionized gas, neutral …

Source: ISS Daily Summary Report - 3/06/2019