[en] This paper reports on the simulation of global decoupling of the SSC 90 degrees lattice, injection optics. The scheme consists of adjusting two families of skew quadrupoles (along with one normal trim quad circuit) to minimize the distance of closest approach of the tunes. It is important to note that this algorithm uses only quantities which can be measured in a real machine, thereby modeling a procedure commonly used on existing accelerators. The resulting coupling coefficient with tunes minimally separated, after one iteration, was always less than 0.0008 for the four random seeds studied. The skew quadrupole corrector strengths were more than an order of magnitude less than that of the cell quadrupoles