SXM-7

Replacement for the XM-3 satellite launched in 2005. While conducting in-orbit testing, the satellite experienced payload unit failures; the exact cause was not announced.

SXM-7 was built by Maxar Technologies for SiriusXM's digital audio radio service (DARS), intended to operate in the S-band spectrum and replace the SXM-3 satellite. Designed to deliver the highest power density of any commercial satellite then on-orbit, it was to generate more than 20 kW of power and carry a large unfoldable antenna reflector enabling broadcast to radios without dish-type antennas. Due to its heavy mass, the payload was injected into a sub-synchronous orbit of 224 km × 19,411 km (139 mi × 12,061 mi) for transfer to GTO by on-board propulsion. It was the first time a commercial primary payload flew on a booster flown more than four times previously, and the first dedicated customer launch to use previously flown fairings.