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LAUNCH OF McDONNELL DOUGLAS SPACE SYSTEMS CO. DELTA II 7925 EXPENDABLE LAUNCH VEHICLE IS SCHEDULED TO TAKE PLACE MAY 9

 LAUNCH OF McDONNELL DOUGLAS SPACE SYSTEMS CO. DELTA II 7925
 EXPENDABLE LAUNCH VEHICLE IS SCHEDULED TO TAKE PLACE MAY 9
 HUNTINGTON BEACH, Calif., April 29 /PRNewswire/ -- The first commercial launch since May 1991 of a McDonnell Douglas Space Systems Co. Delta II 7925 expendable launch vehicle is scheduled to take place May 9 at 7:43 p.m. (EDT) from pad 17B at Cape Canaveral Air Force Station, Fla.
 The launch window is divided into two parts: The first opens at 7:43 p.m. and closes at 8 p.m.; the second opens at 8:31 p.m. and extends until 9:49 p.m.
 Delta 209 will carry the Palapa B4 communications satellite into geosynchronous transfer orbit for PT Telekomunikasi Indonesia (Telkom), the state-owned telecommunications company. Palapa B4 joins three Palapa satellites already in orbit providing telephone, high-speed data relay and television signals to Indonesia's 13,677 islands. Services are also provided to Papua New Guinea and fellow members of the Association of Southeast Asian Nations (ASEAN) -- Brunei, Malaysia, the Philippines, Singapore and Thailand.
 The word "Palapa" connotes Indonesian national unity, and the satellites have proven to be an economical and efficient way to handle the country's geographic barriers, including impassable mountain ranges and vast areas of water.
 Designed and built by Hughes Aircraft Co., the satellite is one of the company's HS-376 series. When fully deployed it will measure 22 feet, 10 inches. The satellite will weigh approximately 2,770 pounds at launch. When fully deployed, its main body will measure 40 inches long by 64 inches wide and 56 inches high. The mission life of Palapa B4 is approximately nine years.
 "The Palapa B4 satellite is the fifth Palapa satellite to be launched by McDonnell Douglas," said Richard Murphy, mission director of the launch. "The success of the Delta rocket and the HS-376 satellite keeps the Indonesian government coming back to the McDonnell Douglas/Hughes team."
 The flight path of Delta 209 will be on a launch azimuth of 97.5 degrees. Initial orbit parameters include an apogee altitude of 19,923 nautical miles and perigee altitude of 1,500 nautical miles.
 The time from launch to spacecraft separation will be approximately 82 minutes.
 During the past 14 years, the Delta launch vehicle has achieved a 98.6 percent success record, with 73 successful launches out of 74 attempts. During the last six years, Delta has had 30 consecutive successful launches.
 Palapa B4 will be the 11th commercial satellite to be launched by McDonnell Douglas Commercial Delta Inc., a wholly-owned subsidiary of McDonnell Douglas Space Systems Co. Future commercial launches include SATCOM C-4 scheduled for August 6; Kopernikus set for Sept. 14; and NATO IVB, scheduled for 1993.
 -0- 4/29/92
 /CONTACT: Tom Williams, Anne McCauley or Sheila Carter of McDonnell Douglas Space Systems Co. 714-896-1300/
 (MD) CO: McDonnell Douglas Space Systems Co. ST: California IN: ARO SU:


EH -- LA023 -- 4575 04/29/92 16:34 EDT
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Publication:PR Newswire
Date:Apr 29, 1992
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