A collector on Earth that was picking up power from a geostationary satellite orbiting at an altitude of 35,800km would need to be spread over hundreds of square metres.

接收35，800公里外的地球同步卫星传送的能源所需的地面收集器需覆盖数百平方米。

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The two men would chase another object orbiting Earth,a satellite.

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Microwaves are broadcast from, say, New York, to a satellite orbiting over Omaha, then bounced to Los Angeles.

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The key property of a satellite orbiting precisely 35, 786 km (22, 240 miles) above the equator is its speed, which mimics the rotation of the Earth below.

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But one of the big innovations of recent years has been the low-orbiting satellite.

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