Browse the glossary using this index

Special | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z | ALL

F

Flare echo

Flare echo is caused by the reflection of large hail in the mid levels of the storm. Radar scatters radiation toward the ground, after that it scatters back to hydrometeors, which then scatter some of the radiation back to the radar.

Frequency

The number of recurrences of a period phenomenon per unit time. Electromagnetic energy is usually specified in hertz (Hz), which is a unit of frequency equal to one cycle per second.