A control strategy for single axis pointing of micro-satellites is proposed which uses only magnetictorquers.This method is useful in satellites' safe modes and other specific situations. It contains the following steps: firstly,a geometry algorithm is utilized to extend the collection of the rotation axis to a plane,along which the current and target directions can coincide; secondly,an angle acceleration plane is found by affine transaction from the perpendicular plane of the local geomagnetic field with ...