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 Mission: Galaxy 18

 

Sea Launch succesfully lifted the Galaxy 18 satellite to geosynchronous transfer orbit on May 21, 2008. A Zenit-3SL rocket lifted off at 2:43am PDT (9:43 GMT) from the Odyssey Launch Platform, precisely on schedule. Spacecraft separation occurred an hour later, with acquisition following shortly afterward from the Hartebeesthoek ground station in South Africa. All systems performed nominally throughout the mission.

Weighing 4,642 kg (10,234 lb), this satellite will enable Intelsat to provide advanced cable television, data and telecommunications services to customers throughout North America, Puerto Rico and Hawaii.

 

 

Intelsat - Space Systems Loral logos

bullseye chart

 Mission Highlights

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Launch Coverage

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Sea Launch carried live coverage of the Galaxy 18 mission via satellite, as well as streaming video on this website. Please click here to see the archived webcast. Please click here to see our other available archived launch videos.


Payload - Galaxy 18

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Built by Space Systems/Loral (SS/L), the 1300-series hybrid spacecraft, weighing in at 4,642 kg (10,234 lb), carries 24 C-band and 24 Ku-band transponders, to provide a variety of services in the continental United States, Alaska, Hawaii, Mexico and Canada. An industry leader in power, performance and reliability, SS/L’s 1300 model is a space-proven platform that supports a wide range of satellite services and has an excellent record of reliable operation. Its high efficiency solar arrays and lightweight batteries are designed to provide uninterrupted electrical power. While this spacecraft is designed for a 15-year service life on orbit, Sea Launch’s direct insertion into equatorial orbit is expected to yield additional years of fuel life. Galaxy 18 will be positioned at 123 degrees West Longitude.

Space Systems/Loral is a subsidiary of Loral Space & Communications. Based in Palo Alto, California, the company designs and builds satellites and spacecraft systems for commercial and government customers around the world. As the leading provider of high-power commercial satellites, SS/L works closely with satellite operators to deliver spacecraft for a broad range of services including direct-to-home television, digital audio radio, broadband Internet and digital multimedia broadcasting.

Intelsat is the leading provider of fixed satellite services (FSS) worldwide, delivering advanced transmission access for information and entertainment to many of the world’s leading media and network companies, multinational corporations, Internet service providers and governmental agencies. Intelsat also offers seamless service for voice, data and video transmission unmatched in the industry. With the globalization of content, broadband, telecom, HD and IPTV fueling next-generation growth, the ever-expanding universe of satellite services are the cornerstones of today's Intelsat.


 Mission Profile

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From its equatorial launch site at 154 degrees West Longitude, a Zenit-3SL launch vehicle lifted the 4,642 kg (10,234 lb) Galaxy 18 spacecraft to geosynchronous transfer orbit, on its way to a final orbital location at 123 degrees West Longitude. The first stage of the vehicle separated two-and-a-half minutes after liftoff and the protective payload fairing jettisoned 75 seconds later. After operating for six minutes, the second stage separated from the Block DM upper stage. The Block DM upper stage then operated for nine-and-a-half minutes. Following a 30-minute coast period, the Block DM burned a second time for three minutes. After the second burn, and another 10-minute coast, the spacecraft separated from the upper stage over the west coast of Africa. Ground stations at Hartebeestok in South Africa, and in Fucino, Italy, tracked the spacecraft to acquire its first signals soon after spacecraft separation.


 Launch Timeline

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Time Event
L= 0:00:00 Liftoff
L+ 0:02:30 Stage 1 Separation
L+ 0:03:45 Payload Fairing Jettison
L+ 0:08:31 Stage 2 Separation
L+ 0:08:41 Block DM 1st Burn Ignition
L+ 0:47:53 Block DM 2nd Burn Ignition
L+ 1:00:48 Spacecraft Separation
L+ 1:05:00 Spacecraft Acquisition (estimated time)

flight profile


ground track


orbital phases


 Mission Album

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