SXM 7 [Maxar]
SXM 7 and 8 are two large high power broadcasting satellites for SiriusXM's digital audio radio service (DARS).
Space Systems/Loral (SS/L), now Maxar Technologies, got in July 2016 the contract to build the two satellites based on their SSL-1300 bus. Both SXM-7 and SXM-8 will operate in the S-band spectrum. Each satellite will generate more than 20-kW of power and will have a large unfurlable antenna reflector, which enables broadcast to radios without the need for large dish-type antennas on the ground.
The satellites will replace the XM 3 and 4 satellites.
SXM 7 was launched in December 2020 and successfully reached geostationary orbit. But after 6 weeks during initial testing a payload failure occured. The satellite is was declared a total loss in February 2021.
SXM 8 is planned for a launch later in 2021.
|Type / Application:||Communication|
|Contractors:||Space Systems/Loral (SS/L) → Maxar Technologies|
|Propulsion:||R-4D-15 HiPAT, 4 × SPT-100 plasma thrusters|
|Power:||2 deployable solar arrays, batteries|
|SXM 7||2020-096A||13.12.2020||CC SLC-40||Falcon-9 v1.2 (Block 5)|
|SXM 8||-||2021||CC||Falcon-9 v1.2 (Block 5)|