  In this paper we propose an experiment designed to observe a
general-relativistic effect on single photon interference. The experiment
consists of a folded Mach-Zehnder interferometer, with the arms distributed
between a single Earth orbiter and a ground station. By compensating for other
degrees of freedom and the motion of the orbiter, this setup aims to detect the
influence of general relativistic time dilation on a spatially superposed
single photon. The proposal details a payload to measure the required effect,
along with an extensive feasibility analysis given current technological
capabilities.
