 The 3 DoF laboratory facilitates simultaneous testing of up to three SPHERES satellites on a flat, nearly friction-less granite surface.The satellites are mounted on air carriages – stands that eject a stream of CO2 to create a cushion of air – allowing the units to translate on X and Y axis, and rotate on Z axis.The MicroGravity Test Facility (MGTF) facilitates testing of a single mobile SPHERES satellite, using six degrees-of-freedom.