  We examine gravitational wave memory in the case where sources and detector
are in an expanding cosmology. For simplicity, we treat the case where the
cosmology is de Sitter spacetime, and discuss the possibility of generalizing
our results to the case of a more realistic cosmology. We find results very
similar to those of gravitational wave memory in an asymptotically flat
spacetime, but with the magnitude of the effect multiplied by a redshift
factor.
