Headlines > News > Ariane 5 is complete with its SPACEWAYTM 3 and BSAT-3a payloads

Ariane 5 is complete with its SPACEWAYTM 3 and BSAT-3a payloads

Published by Rob on Wed Aug 8, 2007 3:16 pm
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The Ariane 5 ECA for Arianespace’s August 14 heavy-lift mission has been “topped off” with its second satellite passenger, completing the payload integration process at Europe’s Spaceport in French Guiana.

Hughes Network Systems’ SPACEWAYTM 3 satellite joined the BSAT-3a atop the Ariane 5, creating the mission’s dual-payload “stack.”

SPACEWAY 3 is mounted on the SYLDA 5 dispenser system, which are encapsulated in Ariane 5’s ogive-shaped payload fairing. This combination was lowered over the BSAT-3a satellite, which previously was installed atop the Ariane launch vehicule’s core cryogenic stage.

During the August 14 flight, the deployment sequence will begin with the jettison of Ariane 5’s payload fairing, which occurs 3 min. 9 sec. into the mission at an altitude of 105 km. SPACEWAY 3 is to be separated from the Ariane 5 approximately 24 minutes later. It will be followed by the release of the SYLDA 5 dispenser at 32 min. into the flight, clearing the way for BSAT-3a’s deployment two minutes later.

For this 33rd launch of Ariane 5, the vehicle will deliver a payload lift performance of more than 8,840 kg. This includes the weight of SPACEWAY 3 (6,075 kg.) and BSAT-3a (1,980 kg.), the satellite installation hardware, and the SYLDA 5 deployment system, which enables Ariane 5 to carry the two passengers on a single launch.

SPACEWAY 3 was built by Boeing Satellite Systems, Inc. in El Segundo, California, and will be operated by the Maryland-based Hughes Network Systems, LLC to provide satellite-delivered broadband services to enterprise, government and consumer users throughout North America. This Boeing 702 spacecraft platform’s innovative design includes onboard dynamic multi-beam switching to deliver bandwidth-on-demand, as well as direct site-to-site mesh networking.

BSAT-3a will be operated by B-SAT Corporation to provide direct television links for the entire Japanese archipelago. The satellite was produced by Lockheed Martin Commercial Space Systems at its Newtown, Pennsylvania facility, and is equipped with 12 130-watt Ku-band channels (with eight operating at one time). BSAT-3a will be the sixth satellite launched by an Ariane for B-SAT Corporation, and the 38th Lockheed Martin-built spacecraft orbited by Arianespace.

(In the photo, above at right, the payload fairing with SPACEWAY 3 and the SYLDA 5 dispenser are ready to be lowered into position over the BSAT-3a satellite, which is mounted atop the Ariane 5’s cryogenic core stage. This image was taken in the upper level of the Final Assembly Building, where the launcher’s payload integration is performed. Click on the image for a larger version.)

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