MAGION-5 Operation on Orbit . ... When the main S/C solar orientation was developed the subsatellite was separated and after this the subsatellite was controlled by the Czech colleagues (the Institute of the Atmosphere Physics of the Czech Academy of Sciences, Panska Ves station, Czech Republic). ... Therefore the subsatellite separation is posibble only when the main S/C is in the given orbit and when its solar orientation and the selfchecking are performed. ... solar sensors system; . ...