What is one characteristic of VHF signals received via auroral backscatter?
They are often received from 10,000 miles or more
They are distorted, with a characteristic raspy sound✓Ճիշտ պատասխան
They occur only during winter nighttime hours
They are generally strongest when your antenna is aimed west
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Auroral backscatter reflects the signal off the constantly moving, turbulent ionised curtains of the aurora, which spreads the signal in frequency. The result is a distorted, buzzy or raspy sound, and CW is often the only mode that stays readable.