Encyclopedia Astronautica
Guardian


American technology satellite. Cancelled 2006. 45% scale version of the Nautilus inflatable human space habitat module, designed to prove the ECS system.

Originally two test flights of this demonstrator were planned. By late 2006 it was announced that it had been cancelled in favor of a single 50% scale unmanned Galaxy module test, scheduled for 2008..

Habitable Volume: 30.00 m3.

Gross mass: 3,000 kg (6,600 lb).
Height: 6.00 m (19.60 ft).
Diameter: 2.00 m (6.50 ft).

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