Boeing 702

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WGS (Wideband Global Satcom) Satellite

Boeing 702 is a communications satellite design. The Boeing Satellite Development Center tailors the payload of each Boeing 702 to meet customer specifications based on a modular design but with usually more than seventy transponders.[1]

The baseline Boeing 702 is compatible with several orbital launch systems, including Delta IV, Atlas V, Ariane 5, Proton, Sea Launch operated Zenit 3SL and Falcon 9.[2]

702MP[edit]

In 2009 Boeing introduced the 702MP platform, an evolution 702HP. The 702MP was designed for satellites in the middle-level power ranges, supporting payloads ranging from 6 to 12 kilowatts. Intelsat is the lead customer for the 702MP. Boeing is building Intelsat 21, Intelsat 22, Intelsat 27 and Intelsat 29e satellites based on the platform.[3]

702SP[edit]

Beginning in 2012, Boeing began manifesting all-electric propulsion commsats on the 702SP propulsion bus for eventual location in Geosynchronous orbit. These satellites are the first which will be launched with the intent to fully position the satellites using electric propulsion, thus requiring four to six months following launch to ready the satellite for its communication mission, but at substantial reduction in launch mass and, therefore, launch cost.[2]

As of March 2014, Boeing has sold four of the 702SP satellites to Asia Broadcast Satellite (ABS) of Hong Kong and Mexico's SatMex, with the first two commsats planned for a paired launch in early 2015 aboard a SpaceX Falcon 9.[4]

XIPS[edit]

Boeing offers a Xenon Ion Propulsion System (XIPS) option for the 702 satellite system.[5] XIPS is 10 times more efficient than conventional liquid fuel systems.[5] On a XIPS equipped 702 satellite; four 25-cm thrusters provide economical station-keeping, needing only 5 kg of fuel per year.[5] Boeing states that this is "a fraction of what bipropellant or arcjet systems consume".[5] Boeing further states that a XIPS can be used for final orbit insertion and has secured firm orders for spacecraft utilizing only ion thrusters.[5][6] This conserves even more payload mass, as compared to using an on-board liquid apogee engine.[5]

Customers[edit]

Customer Satellites Comments
DirecTV DirecTV-10, DirecTV-11, DirecTV-12
PanAmSat Galaxy XI, Galaxy III-C, PAS-1R
Telesat Canada Anik F1, Anik F2
SPACEWAY SPACEWAY-1, SPACEWAY-2, SPACEWAY-3
United States Air Force Wideband Global SATCOM system 5 firm, 1 option (with XIPS)
New Skies NSS-8 (with XIPS), 2 options
XM Radio XM 1 "Rock", XM 2 "Roll"[1], XM 3 "Rhythm", XM 4 "Blues"[2]

References[edit]

  1. ^ "Boeing 702 Fleet". Boeing. 
  2. ^ a b Electric Satellites For Commercial Satcom, Amy Svitek, Aviation Week, 19 Mar 2012, accessed 2012-03-20
  3. ^ "Boeing 702MP Fleet - Intelsat". Boeing. 
  4. ^ Svitak, Amy (2014-03-10). "SpaceX Says Falcon 9 To Compete For EELV This Year". Aviation Week. Retrieved 2014-03-11. "But the Falcon 9 is not just changing the way launch-vehicle providers do business; its reach has gone further, prompting satellite makers and commercial fleet operators to retool business plans in response to the low-cost rocket. In March 2012, Boeing announced the start of a new line of all-electric telecommunications spacecraft, the 702SP, which are designed to launch in pairs on a Falcon 9 v1.1. Anchor customers Asia Broadcast Satellite (ABS) of Hong Kong and Mexico's SatMex plan to loft the first two of four such spacecraft on a Falcon 9 in December in a launch window that opens this year, though SatMex owner Eutelsat said last month that the launch has moved to early 2015. Using electric rather than chemical propulsion will mean the satellites take months, rather than weeks, to reach their final orbital destination. But because all-electric spacecraft are about 40% lighter than their conventional counterparts, the cost to launch them is considerably less than that for a chemically propelled satellite." 
  5. ^ a b c d e f "Boeing 702 Fleet - Fact Sheet pdf". Boeing. 
  6. ^ "Electric propulsion could launch new commercial trend". Spaceflightnow.com.