As satellite communications constellations grow in size and number, they are also competing for a scarce and increasingly valuable resource: spectrum, the bands of radio frequencies that are crucial for communications and broadband service — and for tracking weather.

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Debra Werner is a correspondent for SpaceNews based in San Francisco. Debra earned a bachelor’s degree in communications from the University of California, Berkeley, and a master’s degree in Journalism from Northwestern University. She is a recipient...