Conformal symbols and the action of contact vector fields over the superline

Let K be the Lie superalgebra of contact vector fields on the supersymmetric line R-1|1. We compute the action of K on the modules of differential and pseudo-differential operators between spaces of tensor densities, in terms of their conformal symbols. As applications we deduce the geometric subsymbols, 1-cohomology, and various uniserial subquotients of these modules. We also outline the computation of the K-equivalences and symmetries of their subquotients.