Amateur ExtraE3A08
When a meteor strikes the Earth’s atmosphere, a linear ionized region is formed at what region of the ionosphere?
A
Answer
Radio wave propagation
Type
A
The E region
B
The F1 region
C
The F2 region
D
The D region
Answer Notes
When meteors enter the Earth's atmosphere, they burn up due to aerodynamic friction, leaving a dense, temporary trail of highly ionized gas. This physical process occurs almost exclusively at an altitude of about 50 to 60 miles (80 to 100 kilometers) above the Earth's surface, which perfectly aligns with the E region of the ionosphere.
These ionized trails act as brief, highly reflective mirrors for radio waves, making meteor-scatter communications possible. The D region is too low and dense for this specific type of usable trail, while the F regions are too high for the meteors to encounter enough atmospheric friction to burn up and ionize.
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Atmospheric ducts capable of propagating microwave signals often form over what geographic feature?
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Which of the following frequency ranges is most suited for meteor-scatter communications?