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ISS Assembly Mission 3A

[image-36]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.

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Not long after separation of the space shuttle Discovery from the International Space Station, a shuttle crew member captured this "edge-on" image of the station, featuring its newest additions: the Z1 truss segment and its antenna, as well as the new pressurized mating adapter.
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Page Last Updated: June 18th, 2014
Page Editor: Jerry Wright