  In this work we calibrate two different analytic models of semilocal strings
by constraining the values of their free parameters. In order to do so, we use
data obtained from the largest and most accurate field theory simulations of
semilocal strings to date, and compare several key properties with the
predictions of the models. As this is still work in progress, we present some
preliminary results together with descriptions of the methodology we are using
in the characterisation of semilocal string networks.
