A routine test turned into a surprise discovery when DARPA’s atmospheric sensors picked up something unexpected—courtesy of a falling SpaceX Falcon 9.

While trying to determine if it could use the entire Earth's atmosphere as a massive sensor, DARPA made a highly unusual ...

DARPA's AtmoSense program aims to study how sound waves or electromagnetic frequencies travel through Earth's atmosphere, and to find ways to use these waves as a "global sensor" to detect and ...

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

DARPA's AtmoSense program uses Earth's atmosphere as a global sensor to detect disturbances like underground explosions and ...

DARPA's AtmoSense program aims to study how sound waves or electromagnetic frequencies travel through Earth's atmosphere, and to find ways to use these waves as a "global sensor" to detect and ...

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. But researchers with ...