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Graphics Interchange Format  |  1999-09-30  |  27.5 KB  |  262x332  |  4-bit (16 colors)
   ocr: Crowded Skies. Low Earth orbit (LEO) satellites orbit the Earth as low as 500 miles. Because they're always in motion. with respect to the Earth's sur:, face, a: constellation needs to include at least48to 288 of them.