Vela 4B (also known Vela 8 and OPS 6679) was an American reconnaissance satellite to detect explosions and nuclear tests on land and in space. It was released together with Vela 4A, ERS 18, and .
Vela 4B (also known Vela 8 and OPS 6679) was an American reconnaissance satellite to detect explosions and nuclear tests on land and in space. It was released together with Vela 4A, ERS 18, and . (en)
Vela 4B (also known Vela 8 and OPS 6679) was an American reconnaissance satellite to detect explosions and nuclear tests on land and in space. It was released together with Vela 4A, ERS 18, and . (en)