Protecting the U.S. would require novel solutions, like orbiting missile interceptors that can destroy incoming attacks.

Why is the radar showing no rain when it is raining where I am? The effects of the curvature of the earth on weather radar. 1. The intensity of echoes tends to decrease with increasing distance from ...

noting radar obstacles like the curvature of the Earth and mountains. Satellites can sense all the way to the Earth’s surface, especially important for tracking vessels in the Arctic ...

Abstract: Sky-wave over-the-horizon radar (OTHR) relies on bouncing radio waves off the ionosphere to achieve long-range surveillance, even beyond the Earth's curvature. A critical component of OTHR ...

The B-2 Spirit Bomber is a majestic and incredibly fast aircraft that changed the way the U.S. surveilled the skies … ...

The radar beam is also further from the ground with distance (partly because of the Earth's curvature, and partly because the beam is angled upwards by a fraction of a degree), thereby missing the ...

Is the US Army's Dark Eagle hypersonic missile a crucial breakthrough in an emerging new era of warfare, or an overpriced weapon still struggling to ...

Trump’s shift of Air Force resources from international issues to domestic issues is consistent with promises the president made along the campaign trail.

Severe Weather Awareness Week usually precedes the severe weather. Not this year. The earliest tornado in Minnesota history was confirmed near Princeton and Zimmerman on March 6. Another was ...

Those problems are compounded by the limitations of traditional geostationary orbit satellites which, due to Earth’s curvature ... multifunction active sensor radar, enable it to track, classify ...