It was used to measure radiation in the space environment in order to guarantee safety during the flight of the Vostok 3 and Vostok 4 spacecraft .
Head entity: vostok 3 Q637048 20 21
Tail entity: vostok 4 Q568419 23 24
Relation (head \u2192 tail): P156
Inverse relation (tail \u2192 head): P155