Meteor burst communication
From Simple English Wikipedia, the free encyclopedia
Meteor burst communication is a way of communicating using the ionized trails made by meteors as they enter the earth’s atmosphere. It is also called Meteor scatter communication.
Meteors are lumps of rock which are floating about in space. There are always meteors which are entering the earth’s atmosphere. They normally burn up in the atmosphere. A few very large ones may hit the earth. Most meteors are only tiny specks of dust. As they enter the atmosphere they rip off electrons. This produces an ionized trail. This trail can reflect radio waves in the same way that a wire would.
The meteorites that are used for meteor burst communication are between one thousandth and one hundredth of a gram. Meteorites which are smaller than this are too weak to be used. Meteorites which are larger than this are not frequent enough.
The ionized trail can last for several seconds. During this time messages can be sent between two radio communication stations. The messages will be transmitted very fast: about 200 times as fast as with ordinary radio communication. A typewriter may type several lines of text during a meteor burst. The two stations that want to communicate will have to keep in touch all the time as they never know when the next burst of communication will come. They may have to wait for several meteor bursts before the whole message is received. The transmitters are often put on buoys in the sea.
Meteor burst communication was first widely used in the 1950s. It was particularly useful for military use, because the receiver could not tell exactly which direction the message had come from. This was because the message was reflected on the way, so it did not travel in a straight line (i.e. in a simple circle round the earth’s curve).
The use of satellite communication in recent years has meant that that meteor burst communication is no longer as useful as it was.
