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Oh, and efficiencies would work out to around 25% or so, so the array would have to be 4x that size to produce the full 25 megawatts. The pdf linked assumes a 5x15km solar collector grid per satellite, and 24 satellites in the constellation, based on a recent design. Admittedly the collectors are at an angle to reflect light into a central collector, so they likely wouldn't flare like an Iridium, but I'm fairly certain that they would still be of a visible magnitude.
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