WASHINGTON — Satellite manufacturer Astranis announced Nov. 1 it is teaming up with navigation startup Xona Space Systems to compete for a U.S. Space Force contract aimed at developing a backup to the military’s GPS system.

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Sandra Erwin writes about military space programs, policy, technology and the industry that supports this sector. She has covered the military, the Pentagon, Congress and the defense industry for nearly two decades as editor of NDIA’s National Defense...