TAMPA, Fla. — A week after calling off a SPAC merger intended to raise $420 million for a constellation of commercial weather radar satellites, Tomorrow.io said March 16 its two pathfinder spacecraft passed their critical design review.

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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,...