Sporadic E occurs when the E layer is excessively ionized and can:

Sporadic E occurs when the E layer is excessively ionized and can:

• A. Blank out refractions of signals back to Earth.
• B. Enhance refractions back to Earth.
• C. Have no effect on refractions.
• D. Move closer to the transmitter.

Answer: (A)

Sporadic E creates localized, very dense patches of ionization in the E layer that can reflect VHF signals back toward the Earth. When the ionization level becomes excessive, the layer can act like a very strong, poorly aligned mirror. The energy that would normally bend down and return to ground can be diverted or refracted in ways that miss the receiver, effectively causing a temporary blackout of the path. So, signals may fail to refract back to Earth because the overly ionized layer redirects or attenuates the energy instead of presenting a usable ground path.

Sporadic E creates localized, very dense patches of ionization in the E layer that can reflect VHF signals back toward the Earth. When the ionization level becomes excessive, the layer can act like a very strong, poorly aligned mirror. The energy that would normally bend down and return to ground can be diverted or refracted in ways that miss the receiver, effectively causing a temporary blackout of the path. So, signals may fail to refract back to Earth because the overly ionized layer redirects or attenuates the energy instead of presenting a usable ground path.