  In arXiv:1403.7671, Kapovich, Leeb and Porti gave several new
characterizations of Anosov representations $\Gamma \to G$, including one where
geodesics in the word hyperbolic group $\Gamma$ map to "Morse quasigeodesics"
in the associated symmetric space $G/K$. In analogy with the negative curvature
setting, they prove a local-to-global principle for Morse quasigeodesics and
describe an algorithm which can verify the Anosov property of a given
representation in finite time. However, some parts of their proof involve
non-constructive compactness and limiting arguments, so their theorem does not
explicitly quantify the size of the local neighborhoods one needs to examine to
guarantee global Morse behavior. In this paper, we supplement their work with
estimates in the symmetric space to obtain the first explicit criteria for
their local-to-global principle. This makes their algorithm for verifying the
Anosov property effective. As an application, we demonstrate how to compute
explicit perturbation neighborhoods of Anosov representations with two
examples.
