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the ionosphere is unique because of the significant amount of charged particles it contains, it is the only part of our atmosphere that contains reasonable amount of charged particles that can refract or even reflect high frequency (HF, 3-30MHz) radio waves. This makes the ionosphere a vital tool for long distance propagation of HF radio waves since the waves when transmitted from a point on earth is reflected back to another point on earth, the range depending on the angle of propagation.

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15y ago

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