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ISS Assembly Mission 3A

Truss and PMA-3
Arriving aboard space shuttle Discovery, the STS-92 crew installed the Z1-Truss. Inside the Z1 are four Control Moment Gyroscopes (CMGs) that provide the International Space Station's attitude control.

Arriving aboard space shuttle Discovery, the STS-92 crew installed the Z1-Truss. Inside the Z1 are four Control Moment Gyroscopes (CMGs) that provide the International Space Station’s attitude control. The CMGs were later activated on ISS Assembly Mission 5A. A third pressurized mating adapter was installed on the Unity Node, providing an additional shuttle docking port. A Ku-band antenna provides television capability.+ Previous Mission — 2A.2b | + Next Mission — 2R+ ISS Assembly home