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Author Topic: Sudden Ionic Disturbance Monitors  (Read 4560 times)

Yowbarb

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Sudden Ionic Disturbance Monitors
« on: February 19, 2011, 12:47:28 AM »
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Yowbarb

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Re: Sudden Ionic Disturbance Monitors
« Reply #1 on: February 19, 2011, 12:50:34 AM »
http://en.wikipedia.org/wiki/Sudden_ionospheric_disturbance

A sudden ionospheric disturbance (SID) is an abnormally high ionization/plasma density in the D region of the ionosphere caused by a solar flare. The SID results in a sudden increase in radio-wave absorption that is most severe in the upper medium frequency (MF) and lower high frequency (HF) ranges (adapted from Federal Standard 1037C and from MIL-STD-188), and as a result often interrupts or interferes with telecommunications systems.
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