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 Mission: DIRECTV 7S

 

Sea Launch successfully launched the DIRECTV 7S broadcast satellite to orbit on May 4, 2004. The Sea Launch Zenit-3SL rocket lifted off at 5:42 am PDT (12:42 GMT) from the Odyssey Launch Platform, positioned on the equator in Pacific waters. All systems performed nominally throughout flight. The Block DM-SL upper stage inserted the 5,483 kg (12,063 lb.) DIRECTV 7S satellite into geosynchronous transfer orbit, on its way to a final orbital position at 119 degrees West Longitude.

This mission was Sea Launch's 10th consecutive success. The satellite is the heaviest commercial spacecraft launched successfully to orbit as of this date.



 Mission Schedule

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 Launch Coverage

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You may watch an archived webcast of this mission by clicking on the link here. To ensure your computer is configured correctly with appropriate software, or to watch our archived launch videos, click here.


 Payload - DIRECTV 7S

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From its equatorial launch site at 154 degrees West Longitude, a Zenit-3SL launch vehicle lifted the DIRECTV 7S satellite to geosynchronous transfer orbit (GTO), on its way to a final orbital position at 119 degrees West Longitude. DIRECTV 7S, the second spot beam satellite in the DIRECTV fleet, will use highly focused spot beam technology to provide DIRECTV with the capacity to deliver more than 400 additional local channels to more than 60 local channel markets, including 41 new local channel markets.

Built by Space Systems/Loral (SS/L), the 5,483 kg (12,063 lb.) satellite is also capable of operating from 101 degrees West Longitude, the primary orbital slot for DIRECTV. In one operating mode, the new satellite will be capable of providing up to 54 transponders for high-quality local and national digital video service broadcast into 27 beams. In its other configuration, the satellite will be capable of providing up to 44 transponders broadcast into 30 beams.

DIRECTV is the nation's leading digital multichannel television service provider with more than 12.2 million customers. Loral's 1300 series spacecraft is one of several high capacity direct-to-home (DTH) broadcast satellites SS/L has built for DIRECTV. This is Sea Launch's second mission for DIRECTV and our third for Loral. Our first DIRECTV launch was on October 9, 1999, when we successfully placed DIRECTV 1R into orbit. Our most recent launch for Loral was Telstar 14/Estrela do Sul 1 on January 10, 2004.

Sea Launch signed an agreement with Arianespace in November 2003 to launch the DIRECTV 7S satellite through a cooperative arrangement with Boeing Launch Services, under the launch services alliance. The creation of the alliance in July 2003 allowed Arianespace to negotiate a seamless transfer of the satellite to Sea Launch, and for DIRECTV to secure a guaranteed launch slot for this important mission. The alliance utilizes launch systems from three leading service providers - Arianespace, Boeing Launch Services and Mitsubishi Heavy Industries - to provide customers with on-time launches and total mission assurance.


 Mission Profile

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The Sea Launch team placed the DIRECTV 7S satellite into geosynchronous transfer orbit, with the spacecraft separating from the upper stage over Brazil, just 29 minutes after liftoff. Two-and-a-half minutes into the flight, the first stage of the Zenit-3SL vehicle separated and the payload fairing was jettisoned. Five minutes later, the second stage separated from the Block DM-SL upper stage. The Block DM-SL upper stage burned for nearly eleven minutes, coasted for ten minutes and then separated from the spacecraft. A ground station in Fucino, Italy, acquired the first signal from the satellite, about 16 minutes after spacecraft separation. Ground operators from Space Systems/Loral then directed DIRECTV 7S to its final position in geostationary orbit at 119 degrees West Longitude.


 Launch Timeline

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Time Event
L= 0:00:00 Liftoff
L+ 0:02:29 Stage 1 Separation
L+ 0:03:37 Payload Fairing Jettison
L+ 0:08:41 Stage 2 Separation
L+ 0:08:51 Block DM Ignition
L+ 0:19:31 Block DM Shutdown
L+ 0:29:21 Spacecraft Separation
L+ 0:47:00 Spacecraft Acquisition (estimated time)





 DIRECTV 7S Mission Album

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