1-Designs Constructed from the Groups $PSL_{2}(81)$ and $PSL_{2}(89)

In this paper, some designs from the primitive permutation representations of the groups $PSL_2(81)$ and $PSL_2(89)$ are constructed using the Key-Moori Method 1. We determine the automorphism groups of all the obtained designs and prove that the groups $PSL_2(81)$, $PSL_2(81){}^{.}2$, $PSL_2(81)\text{:}2$, $PGL_2(81)$, $P\Sigma L_2(81)$, $P\Gamma L_2(81)$, $PSL_2(89)$ and $PSL_2(89)\text{:}2$ appear as the automorphism groups of these constructed designs.