Skip to end of metadata
Go to start of metadata

The International Telecommunication Union (ITU) has defined the radio wave frequency ranges as shown in the table.

Most of the plasma waves occurring in the magnetosphere are "ultra-low-frequency" (ULF) range geomagnetic pulsations occurring below 5 Hz, i.e., outside of this classification. (Their high frequency limit corresponds to magnetospheric ion gyrofrequencies, which are low because of small B and high m). On the other hand, wave types relating to electrons, or those created at the ionospheric altitudes, can reach frequencies covered by the table (ELF - VLF). These include, e.g., whistler waves.

Instruments like incoherent scatter radars work typically at VHF and UHF frequencies. Radiowave frequency ranges are:

Abbr.

Name

Frequencies

ELF

Extremely Low Frequencies

30 - 300 Hz

VF

Voice Frequencies

0.3 - 3 kHz

VLF

Very Low Frequencies

3 - 30 kHz

LF

Low Frequencies

30 - 300 kHz

MF

Medium Frequencies

0.3 - 3 MHz

HF

High Frequencies

3 - 30 MHz

VHF

Very High Frequencies

30 - 300 MHz

UHF

Ultra High Frequencies

0.3 - 3 GHz

SHF

Super High Frequencies

3 - 30 GHz

EHF

Extremely High Freqiencies

30 - 300 GHz


  • No labels