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ADVISORY/ILS Proton to Launch Intelsat 903.

Assignment/News Editors

ADVISORY...for Saturday (March 30)

--(BUSINESS WIRE)


Payload: Intelsat 903
 Loral 1300 platform
 Separated mass: approx. 4,726 kg (10,421 lbs)

Launch Vehicle: Proton K/Block DM
 Weight at liftoff: 691,272 kg
 (1.5 million lbs), including payload
 Height: 57.2 m (187.7 ft)
 Payload fairing: 4.35 m (14.27 ft) diameter

Launch Date: Saturday, March 30, 2002

Launch Window Opens: 10:25 p.m. Baikonur
 8:25 p.m. Moscow
 17:25 GMT
 12:25 p.m. EST (USA)

Launch Site: Baikonur Cosmodrome, Kazakhstan
 Launch Complex 81, Pad 23

End User: Intelsat, international satellite operator

Satellite Manufacturer: Space Systems/Loral, Palo Alto, Calif.

Launch Vehicle Khrunichev State Research and Production
Manufacturer: Space Center, Moscow - Proton first three
 stages; RSC Energia, near Moscow - Block DM
 fourth stage

Launch Services International Launch Services (ILS), McLean,
Provider: Va.

Satellite Use: Internet, broadcast, telephony and business
 services for Atlantic and eastern Pacific
 ocean regions

Satellite Statistics: -- 4th satellite launched in Intelsat IX
 series
 -- Orbital location: 325.5 degrees East
 longitude
 -- 76 transponders at C-band (36 MHz
 equivalent units)
 -- 24 transponders at Ku-band (36 MHz
 equivalent units)
 -- Anticipated service life of 13 years

Mission Profile: The Proton launch vehicle will inject the
 Intelsat 903 satellite into geosynchronous
 transfer orbit. The first three stages will
 use a standard ascent trajectory to place the
 Block DM upper stage with the satellite into
 a 161-km (100-mi) circular parking orbit,
 inclined at 51.6 degrees. Then the "enhanced"
 three-burn Block DM will propel the satellite
 to its transfer orbit. Following separation
 from the Block DM, the spacecraft will
 perform a series of liquid apogee engine
 burns to raise perigee, lower inclination and
 circularize the orbit at the geostationary
 altitude of 36,000 km (22,300 mi).

Spacecraft Separation: Approximately 6 hours, 43 minutes after
 liftoff

ILS Mission Statistics: -- 3rd ILS mission this year
 -- 1st ILS Proton mission this year
 -- 22nd ILS mission on Proton since formation
 of the U.S.- Russian joint venture in 1995


Live Broadcast: Satellite: Telstar 5, transponder 23, C-band
 Downlink frequency 4169 vertical
 Test signals to begin at 11:30 a.m. EST

More Information: Live webcast and general mission information
 are available on the ILS web site at
 www.ilslaunch.com. Launch status updates are
 available on the ILS U.S. domestic Launch
 Hotline at 1-800-852-4980.
COPYRIGHT 2002 Business Wire
No portion of this article can be reproduced without the express written permission from the copyright holder.
Copyright 2002, Gale Group. All rights reserved. Gale Group is a Thomson Corporation Company.

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Publication:Business Wire
Date:Mar 26, 2002
Words:390
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