Xona Space's Pulsar-0 satellite Credit: Xona Space

WASHINGTON — Belgian satellite manufacturer Aerospacelab has won a contract to build eight spacecraft for California-based startup Xona Space Systems, which is developing a commercial positioning, navigation and timing service designed to complement and back up GPS.

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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...