A US 3-unit CubeSat mission to study plasma instabilities that lead to irregularities in the alignment of the geomagnetic field. RAX-1 was launched on 30 November 2010, from Kodiak Island, Alaska, into a circular orbit at an altitude of 650 km. A follow-on mission, RAX-2, was launched on 20 October 2011, into a Sun-synchronous near-circular polar orbit at an altitude of 824 km.