首页> 外文会议>55th International Astronautical Congress 2004 vol.8 >MBSAT A DIRECT BROADCAST SATELLITE FOR MOBILE USERS IN JAPAN AND KOREA
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MBSAT A DIRECT BROADCAST SATELLITE FOR MOBILE USERS IN JAPAN AND KOREA

机译:MBSAT是日本和韩国移动用户的直接广播卫星

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The MBSAT spacecraft was launched on March 13, 2004 from Cape Canaveral Air Force Station on an Atlas III-A launch vehicle. The satellite is now in service at its orbital location of 144° E longitude. The satellite is designed to provide high-quality audio, video and data services to mobile users in Japan and Korea. Broadcast transmissions use 25 MHz of bandwidth at the S-band frequency of 2.6 GHz, while uplinks and feeder links to terrestrial repeaters use the Ku-band. The MBSAT satellite design incorporates a large, unfurlable, mesh reflector for S-band broadcast. This 12-meter (effective aperture) reflector coupled with phase-combined arrays of Traveling Wave Tube Amplifiers result in Effective Isotropic Radiated Power levels of 67 to 69 dBW over Japan and Korea coverage areas. The use of Stationary Plasma Thrusters for North-South stationkeeping significantly enhances the mission lifetime as well as minimizes potential disturbances to the 12-m reflector.
机译:MBSAT航天器于2004年3月13日从卡纳维拉尔角空军基地乘坐Atlas III-A运载火箭发射升空。该卫星现已在其经度为144°的轨道位置服役。该卫星旨在为日本和韩国的移动用户提供高质量的音频,视频和数据服务。广播传输在2.6 GHz的S频段频率上使用25 MHz的带宽,而到地面中继器的上行链路和馈线链路则使用Ku频段。 MBSAT卫星设计包含用于S波段广播的大型,不易弯曲的网状反射器。这种12米(有效孔径)反射器与行波管放大器的相位组合阵列相结合,在日本和韩国的覆盖区域内产生的等效全向等效辐射功率水平为67至69 dBW。使用固定式等离子推进器进行南北定位时,可显着延长任务寿命,并将对12米反射器的潜在干扰降至最低。

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