Question
Which of the following frequency ranges is most suited for meteor-scatter communications?
Answer Options
- A) 1.8 MHz - 1.9 MHz
- B) 10 MHz - 14 MHz
- C) 28 MHz - 148 MHz
- D) 220 MHz - 450 MHz
Correct Answer: C
Explanation
Meteor scatter relies on the physics of radio wave reflection from the ionized trails left by meteors. The effectiveness of this reflection strongly depends on the radio frequency used relative to the density and size of the trail. The trails are most reflective for signals in the VHF/low-UHF range.
Therefore, the frequency range most suited for this type of propagation is generally the upper HF through lower VHF range, specifically 28 MHz - 148 MHz (which includes the 10-meter, 6-meter, and 2-meter amateur bands). Although operation is possible on higher UHF frequencies, the signal loss is much greater, and the short-lived trails are less dense, making the lower VHF frequencies the most practical for reliably bouncing signals off meteor trails.
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