HawkEye 360 operates a constellation of nine RF-monitoring satellites. Twenty-one additional satellites are under construction or built and awaiting launch. Credit: Hawkeye 360

WASHINGTON — The U.S. Army has signed an agreement to evaluate the use of space data from HawkEye 360, an Earth observation company that operates satellites to monitor radio-frequency signals emitted by electronic devices.

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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...