  The purpose of this study is to determine the experimental uncertainties in
measuring mass and cross section parameters of SUSY particles at a 500 GeV
Linear Collider. In this study SUSY is a point in the focus point region of
mSUGRA parameter space that is compatible with WMAP constraints on dark matter
relic density. At this study point the masses of the squarks and sleptons are
very heavy, and the only SUSY particles accessible at the Linear Collider would
be the three lightest neutralinos, and the two lightest charginos: nino1,
nino2, nino3, cino1+, cino2+, where nino1 is the lightest supersymmetric
particle (LSP). The charginos or neutralinos may be pair produced, and the
subsequent decay cascades to the LSP allow us to measure the SUSY couplings and
mass spectrum. We find that by looking for the signature 2 jets plus 2 leptons
plus missing energy we can determine the mass of the LSP to within 1 GeV
uncertainty and that the mass differences of nino2 and nino3 with the LSP mass
can be determined to better than 0.5 GeV.
