Tuesday 15 June 2010

Impact of Leonid meteor shower

Leonid meteor dust is very small in size as small as grains of sand, but that does not mean no harm. With a speed of approximately 252 000 km / h! the Leonid meteor dust is very dangerous for the instrument space like satellites. Leonid meteor dust velocity is high enough compared with other meteor velocity of approximately 108 000 km / hr.

In addition to the destruction of the satellite, the Leonid meteor shower also affects HF radiowave propagation. Leonid meteor shower coming into Earth's atmosphere can cause ionization in ketinggial 80-100 km above the earth's surface. Consequently at this height will create a new layer of the ionosphere that is sporadic E layer. This layer is capable of reflecting the HF radio waves so that if there are no sporadic E layer, HF radio waves will be reflected by the higher layer. HF waves are then going to reach more distant regions. Different if the sporadic E layer appears, HF waves will be reflected by the sporadic E layer of this and because of its lower then jangkaunya power even shorter. 

Another effect is the creation of spectacular scenery, especially the time of the Leonid meteor storm in which the meteors appear to be numbered 150 000 meteors per hour! Leonid meteor storm occurred in 1966, 1998, 2002 and years later.

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