  Following the historical observation of GW170817 and its electromagnetic
follow-up, new neutron star merger afterglows are expected to be observed as
counterparts to gravitational wave signals during the next science runs of the
gravitational interferometer network. The diversity of the observed population
of afterglows of these future events is subject to various factors, which are
(i) intrinsic, such as the energy of the ejecta, (ii) environmental, such as
the ambient medium density or (iii) observational, such as the viewing angle
and distance of the source. Through prescribing a population of mergers and
modelling their afterglows, we study the diversity of those events to be
observed jointly in gravitational waves and electromagnetic bands. In the
future, observables of detected events such as viewing angle, distance,
afterglow peak flux or proper motion will form distributions which together
with predictions from our study will provide insight on neutron star mergers
and their environments.
