There are many radio transmitters out there: Television, FM radio, and AM radio are the most obvious ones, but cell phone towers and even satellites can be used for passive radar. These ...

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

Monitoring traffic with this passive radar will not do a thing to slow drivers down, but it’s a pretty cool hack that will at least yield some insights into traffic patterns. The principle ...