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TRUMPET (also known as ''JEROBOAM''〔("Second Titan IV of 1994 orbits SIGINT satellite. ) (Jeroboam signal intelligence satellite launched for National Reconnaissance Office)", Defense Daily, May 4, 1994〕), called Advanced Jumpseat by some observers, is reportedly a series of ELINT reconnaissance satellites launched by the United States during the 1990s to replace the Jumpseat satellites. Speculated to weigh 5,200 kg, three of these satellites were launched into highly elliptical orbits by Titan 4 launch vehicles from Cape Canaveral between 1994 and 1997. Their precise mission and capabilities are classified. News reports state that the satellites monitor radio communication using antennas with diameters of 150 m.〔(Riesige Lauscher am Himmel ), Die Zeit, Juli 28, 1995 (in German)〕 It is speculated that the satellites are manufactured by Boeing.〔http://www.planet4589.org/space/jsr/back/news.344 Jonathan's Space Report: ''No. 344''〕 ==Design== According to NASA's National Space Science Data Center, Trumpet SIGINT satellites have a large deployable mesh antenna, and were initially aimed at monitoring Soviet communications and missile tests.〔(【引用サイトリンク】title=USA 103 )〕 Trumpet 5 is allegedly the second satellite of a new series. Its tasks are believed to be signals intelligence and early warning, using a SBIRS HEO-2 infrared missile early warning package. In addition it is supposed to carry a NASA/Los Alamos TWINS-B magnetospheric research payload.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Trumpet (satellite)」の詳細全文を読む スポンサード リンク
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