In order to reveal the underlying structure of Supersymmetry one has to determine the low--energy parameters without assuming a specific SUSY breaking scheme. In this paper we show a procedure how to determine M_1, \Phi_{ M_1}, M_2, \mu, \Phi_{ \mu} and \tan\beta even in the case when only light charginos \tilde{ \chi}^{ \pm}_1 and neutralinos \tilde{ \chi}^0_1, \tilde{ \chi}^0_2 would be accessible at the first stage of a future Linear Collider with polarized beams.
Categories: hep-ph