Amateur Radio Reverse Beacon Network

Instead of beacons actively transmitting signals, the Reverse Beacon Network is a network of stations listening to the bands and reporting what stations they hear, when and how well.

It enables you to see band openings in near-real time on an animated map. You can call a quick CQ, and see which reverse beacons hear you, and how strong you are.

There is also a database of past "spots". You can instantly find out what stations, from a given country or zone, have been heard, at what times and on what frequencies. You can see when you've been spotted, who spotted you, and how loud you were.

The Reverse Beacon Network depends on volunteer stations. Currently, there are a few dozen, some active almost 24/7, others coming up only occasionally.

Find out more at
http://www.reversebeacon.net/