由于立方体卫星如此小而轻，与传统通讯或GPS卫星相比，将它送入地球轨道的成本要低得多。
Because they're so small and light, it costs much less to get a Cube Sat into Earth's orbit than a traditional communications or GPS satellite.
太阳风暴威胁着所有的围绕地球运行的人造天体，包括GPS定位和通讯卫星，载人航天飞机和国际空间站。
Solar flares threaten all of the artificial objects orbiting our planet including GPS and telecommunications satellites occupied spacecraft and the International space Station.
尽管无线与卫星连接被广泛应用，全球通讯还是主要仰赖于遍布地球表面的光纤。
Despite widespread wireless Internet and satellite connections, global communications still rely largely on the vast webs of fibre optic cables that cover the planet.
重型火箭在2004年进行首次发射，它可以将24吨重的负载发送到低地球轨道，也能将用于通讯卫星的11吨重的载荷送入地球同步轨道。
The rocket made its first flight in 2004 and is capable of launching payloads of up to 24 tons into low-Earth orbit and 11 tons toward the geosynchronous orbits used by communications satellites.
在昨天举行的一场会议中传出，一次大规模的太阳活动-耀斑，将可能在2013年袭击地球，造成全球性的混乱，可能引发断电、卫星通讯等故障。
A massive solar flare could cause global chaos in 2013, causing blackouts and wrecking satellite communications, a conference heard yesterday.
Soyus火箭携带了一颗将被送入地球同步轨道的军用通讯卫星升空。当它掠过俄罗斯乌拉尔群山中最大的城市叶卡捷琳堡时，制造了这场盛大的表演。
The Soyuz rocket, launched to carry a military communications satellite into orbit, created a spectacular light show as it passed over Ekaterinburg, the biggest city in Russia's Ural Mountains.
这些卫星处在平稳旋转的地球上空，几乎可以对全球的所有地区进行稳定的扫描，因此能很好地完成气象观察、通讯以及其它任务。
Such satellites—maintaining their steady sweeps as the earth revolves beneath them—cover all parts of the globe and hence are ideal for weather observation, communications and other tasks.
铱：如果铱听起来让你觉得熟悉，那可能是因为很多通讯卫星都是以这种硬而脆的大密度金属元素命名的，也可能是因为恐龙在白垩纪末从地球灭绝，与铱有关的缘故。
Iridium (Ir): If iridium sounds familiar, that might be because there’s a group of communications satellites named after this element, a hard, brittle and dense metal.
最后，这些被加速的电子束陷入地球的辐射带之内，可以对卫星通讯和导航系统产生干扰。
Eventually, the accelerated electrons become trapped in the Earth's radiation belts, where they can interfere with satellite communications and navigation.
卫星-绕地球运转的一个无线电转发站，卫星通讯系统还包括每个通过卫星进行通讯的地面台站。
Satellite - A radio relay station that orbits earth. A satellite communications system also includes earth stations which communicate with each other via the satellite.
典型的通讯卫星位于地球同步轨道，约在地球上方35，900公里处，操作频率向地传输4吉赫，向上传输为6吉赫。
Typically they move in geosynchronous orbits about 22,300 mi (35,900 km) above the earth and operate at frequencies near 4 gigahertz for downlinking and 6 GHz for uplinking.
典型的通讯卫星位于地球同步轨道，约在地球上方35，900公里处，操作频率向地传输4吉赫，向上传输为6吉赫。
Typically they move in geosynchronous orbits about 22,300 mi (35,900 km) above the earth and operate at frequencies near 4 gigahertz for downlinking and 6 GHz for uplinking.
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