An Army soldier uses a portable UHF satellite antenna and a multichannel radio during a military exercise at Caserma Del Din and Caserma Ederle, Italy. Credit: U.S. Army

WASHINGTON — York Space Systems said June 24 that a satellite it built for the U.S. Space Force successfully demonstrated two-way tactical communications using ultra-high-frequency (UHF) links from low Earth orbit. This was part of an experiment to test whether communications now provided by geostationary satellites can be delivered from low orbit.

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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...