SXM-8 is a large high power broadcasting satellite for SiriusXM's digital audio radio service (DARS). Space Systems/Loral (SS/L) got in July 2016 the contract to build the two satellites based on their SSL-1300 bus - SXM-7 and SXM-8. Both 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. SXM-8 is meant to replace the XM-4 satellite.
This is the second uncrewed test flight for the Starliner spacecraft. Reflight of the OFT mission will allow Boeing to demonstrate readiness of the spacecraft and implement corrections to the problems which were found during the first OFT flight.Low Earth Orbit