Calhoun served as the main developer on the software used to run the simulations that detect signals seen in the atmosphere ...

"The phenomenon is highly repeatable. We discovered an unplanned new technique for identifying objects entering the earth's atmosphere." ...

While testing a new system, DARPA unintentionally created a "rocket radar" that can detect objects reentering Earth's atmosphere.

The goal of DARPA's AtmoSense program, which kicked off in late 2020, is to determine whether acoustic and electromagnetic waves propagating through the Earth's atmosphere could allow the US ...

Researchers with the U.S. military's Defense Advanced Research Projects Agency (DARPA) have successfully used Earth's atmosphere as a sensor to detect a distant disturbance. DARPA's AtmoSense ...

The goal of DARPA's AtmoSense program, which kicked off in late 2020, is to determine whether acoustic and electromagnetic waves propagating through the Earth's atmosphere could allow the US military ...