%0 Journal Article %T Gauge Coupling Constant Unification With Planck Scale Values Of Moduli %A D. Bailin %A A. Love %A W. A. Sabra %A S. Thomas %J Physics %D 1996 %I arXiv %R 10.1016/0370-2693(96)00378-4 %X Convergence of the standard model gauge coupling constants to a common value at around $2\times 10^{16}$ GeV is studied in the context of orbifold theories where the modular symmetry groups for $T$ and $U$ moduli are broken to subgroups of $PSL(2, Z)$. The values of the moduli required for this unification of coupling constants are studied for this case and also for the case where string unification is accompanied by unification to a gauge group larger then $SU(3)\times SU(2)\times U(1).$ %U http://arxiv.org/abs/hep-th/9602132v2