Umbra Founders David Langan and Gabe Dominocielo stand next to one of the parabolic antennas the Santa Barbara, California, company is building for its planned constellation of small synthetic aperture radar satellites.

After years of secrecy, Umbra Lab is revealing details of its plan to launch a constellation of 50-kilogram synthetic aperture radar satellites to capture imagery with a resolution of 25 centimeters.

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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...