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1400 kHz Gyro Frequency

November 6th Fact-of-the-Day

Earth's magnetic field passes through the ionosphere and exerts a force on ionospheric electrons that is proportional to their instantaneous velocities and to the component of the magnetic field at right angles to their directions of motion. The force direction is at right angles to the component of the magnetic field producing the deflecting force and also to electron motion directions caused by radio waves. The effect at high radio frequencies is to cause each electron to vibrate in an elliptical path and at low radio frequencies to vibrate in a loop. A crossover between elliptical and loop electron paths occurs at approximately 1400 kHz where each electron moves in a spiral path. That special frequency is called the gyro frequency. ©2004 Martek International All rights reserved.


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