  We demonstrate how the interplay of a future e^+e^- LC at its first stage
with sqrt{s} sim 500 GeV and of the LHC could lead to a precise determination
of the fundamental SUSY parameters in the gaugino/higgsino sector without
assuming a specific supersymmetry breaking scheme. We demonstrate this for the
benchmark scenario SPS1a, taking into account realistic errors for the masses
and cross sections measured at the LC with polarised beams, including errors
coming from polarisation measurements, and mass measurements at the LHC. The
results clearly demonstrate the complementarity of the LHC and LC, and the
benefit from the joint analyses of their data.
