Five years after their spectacular implosion, low-Earth-orbit satellite-communications constellations are on the mend. The so-called big and little LEOs have emerged from a round of bankruptcies and takeovers triggered by the telecom collapse, terrestrial competition and overly-optimistic business plans into what one executive calls "a high-end niche market" that needs continuous voice and data connectivity. The biggest and clearest sign of the LEO revival was made by Globalstar late ...


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