COLOGNE, Germany — The German air force has begun testing so-called passive radar as a complementary surveillance technique for ground-based air-defense formations, aimed at helping covert operations ...

It’s an issue we can no longer afford to treat as theoretical. To address this threat, the space industry must transition from ground-based tracking to orbit-based detection systems capable of ...

I crossed five states, dodged speed traps, and delivered Katz’s pastrami from New York to Michigan while it was still warm, ...

As active radar seekers are increasingly vulnerable to new threats, U.S. Defense Undersecretary Mike Griffin is reconsidering the merits of missiles that use older, semi-active radar technology to ...

In winter, avalanches pose the biggest danger in the mountains. Avalanche monitoring is therefore of critical importance to ...

Passive radar systems have emerged as a transformative technology in remote sensing by exploiting non-cooperative illuminators such as GNSS, communication, television, and radio signals. Unlike ...

You've probably seen it in movies like "Iron Eagle," "Top Gun," and "Hot Shots," -- a pilot is flying through the sky when they're suddenly alerted that they're being "painted" by radar. This happens ...

Traditional sonar and radar use an echo-based approach, and have been amazingly successful in sensing and tracking vehicles and objects under water, through the air, or even in space. The principle is ...