  Supersymmetric grand unified models based on SO(10) gauge symmetry have many
desireable features, including the unification of Yukawa couplings. Using
D-term contributions to scalar masses arising from the breakdown of SO(10),
Yukawa coupling unification only to 30% can be achieved in models with a
positive superpotential Higgs mass. The superparticle mass spectrum is highly
constrained, and yields relatively light top squarks and charginos.
Surprisingly, the pattern of GUT scale soft SUSY breaking masses are close to
those found in the context of inverted hierarchy models. Our analysis supports
the idea that the low energy MSSM parameter space is an approximate SO(10)
inspired fixed point.
