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Reflecting satellites, big business
Hi
Can anyone help me determine how much data that is physically possible to transport with a beam of light from Earth reflected on a satellite back to Earth again with an good reflector? I made a fast calculation on the moon and found that since the mirror is distributed over a distance of 0.1 m a difference in time of the signal of one nanosecond will occur limiting the bitrate to maximum one gigabit per second which is not worth transporting. On the other hand maybe 1000 different light frequencies can be used making it possible to sell the data flow for $ 500 000 per month. To find out if it is worth doing assume a transport price of 0.5 $ per megabit per second for one month (approx 600 gigabyte per $). Is it worth building, place in orbit and maintain such a satellite? I can imagine a low orbit satellite with a big concave mirror, a plane mirror in the focal point and another big concave mirror aiming the reflected beam back to earth in a non diverging beam to another place on Earth. Precision would be at least 1 000 higher than the Moon example giving a cash flow of ½ billion $ per month. How much would the atmosphere distort this signal? Someone might complain about clouds blocking the signal but it would anyway be valuable for cloud free moments. Internet operators could save money whenever the sky is clear. David David Jonsson, Sweden, phone callto:+46703000370 |
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