Tomorrow.io plans to monitor global weather with dozens of mini-fridge-size satellites, scheduled to begin launching into low Earth orbit in 2022.

ClimaCell, a weather data company, announced plans Feb. 24 to launch dozens of radar satellites to improve forecasts.

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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...