The Space Technology Program Houston 6 (STP-H6) X-ray Communication (XCOM) technology demonstration will perform the first space-based demonstration of communication in the X-ray band, and it is a joint effort between the Naval Research Laboratory (NRL) and NASA’s Goddard Space Flight Center. The XCOM demonstration will take advantage of the Neutron Star Interior Composition Explorer (NICER) mission, which is currently operating on the International Space Station (ISS), by using it as a one-way X-ray receiver, with the signal being transmitted through space over a range of approximately 50 m along the ISS truss.