The Boeing HS-702 (also sold as the BSS-702) is an orbital communications relay satellite developed by Hughes Electronics Division which was bought by the Boeing company in October 2000.
It is one of the largest models of the HS- series, weighing in at about 4,500kg. It sits above the HS-376, HS-601/601HP/601+ and below the HP-702+. The '702 is a body stabilized (as opposed to spin stabilized like the '376) platform capable of coordinating up to 94 operating transponders (operating in the C-Band and Ku-Band) with a power over 15,000 watts. For transorbital maneuvering, It features a 25 centimeter/diameter XIPS (Xenon Ion Propulsion System) thruster capable of 3800 seconds ISP 165 mN of thrust.
The initial design phases were completed by Hughes' between 1994 and 1995, with the first orders, from the US Government among others, received in 1996; Approximately 15 702's have been purchased with about 10 having already been orbitally deployed. The most popular launch vehicle has been the Zenit-3Sl followed by the Ariane-44L H10-3.
The 702 is the satellite used by XM, the satellite radio company, modified with 2 S-Band transmitters and an X-Band receiver. 3 have been purchased from Boeing with 2 currently deployed and the third in storage as a backup. "XM-1" and "XM-2" (their official designations), affectionately known as "Rock" and "Roll", were launched May 8, 2001 and March 18, 2001 respectively.