TAMPA, Fla. — Electrical issues disclosed a few months ago on the first four O3b mPower satellites in medium Earth orbit will significantly reduce their operational life and broadband capacity, their operator SES announced Oct. 31.

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Jason Rainbow writes about satellite telecom, finance and commercial markets for SpaceNews. He has spent more than a decade covering the global space industry as a business journalist. Previously, he was Group Editor-in-Chief for Finance Information Group,...