Satellite communication is becoming bigger and better, and I wanted to find out more.
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2I think your questions are interesting & you'll enjoy and make good use of this site once you put a little more work into your question posts. I see that you were advised to post this question separately and followed through, which is great! But maybe you can edit this question and narrow it down to a single answerable question, and consider writing new, separate, carefully written question posts for each of the other parts. Welcome to Space! – uhoh May 19 '20 at 00:46
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3Nice edit, retracting close vote. – Organic Marble May 19 '20 at 01:46
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2Voting to leave open in light of the edit. It is an interesting question now. – William R. Ebenezer May 19 '20 at 06:29
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The cheapest communications satellite, at least in terms of the cost of the satellite itself, was almost certainly Echo 1. I don't have a dollar figure, but the sheer simplicity of the design is hard to beat: it was a 30-meter Mylar balloon that reflected high-frequency radio waves.
Mark
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Some nice photos of Echo 1 and Echo 2 at Did Echo 2 remain spherical without requiring gas pressure? If so, how is this known to be true? – uhoh May 19 '20 at 04:21
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