$L^p$-bounds in Safarov pseudo-differential calculus on manifolds with bounded geometry

Given a smooth complete Riemannian manifold with bounded geometry $(M,g)$ and a linear connection $\nabla$ on it (not necessarily a metric one), we prove the $L^p$-boundedness of operators belonging to the global pseudo-differential classes $\Psi_{\rho, \delta}^m\left(\Omega^\kappa, \nabla, \tau\right)$ constructed by Safarov. Our result recovers classical Fefferman's theorem, and extends it to the following two situations: $\rho>1/3$ and $\nabla$ symmetric; and $\nabla$ flat with any values of $\rho$ and $\delta$. Moreover, as a consequence of our main result, we obtain boundedness on Sobolev and Besov spaces and some $L^p-L^q$ boundedness. Different examples and applications are presented.