SXM-7

During in-orbit testing, SXM-7 experienced payload unit failures whose cause was never publicly disclosed; the satellite was eventually declared a total loss.

SXM-7 was built by Maxar Technologies to replace XM-3 (in orbit since 2005) in SiriusXM's digital audio radio service. The satellite was designed to carry a large unfoldable antenna reflector and generate more than 20 kW of power. Due to its mass, it was injected into a sub-synchronous transfer orbit to reduce the propellant needed for the final climb to geostationary altitude.