The U.S. Air Force's upcoming fifth and sixth satellites in its missile warning constellation will have a new satellite bus. CREDIT: Lockheed Martin.

The U.S. Air Force will use Lockheed Martin’s standard satellite bus on the forthcoming fifth and sixth satellites of its Space Based Infrared System missile warning constellation as part of a much discussed “refresh” of the program’s technology.

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Mike Gruss is the chief content and strategy officer at SpaceNews. From 2013 to 2016 he was a senior reporter at SpaceNews covering military space. Previously, he was editor in chief of Sightline Media Group and worked as a reporter and columnist for...