ART4 – 4 – Band number Symbols Frequency range (lower limit exclusive, upper limit inclusive) Corresponding metric subdivision 4 VLF 3 to 30 kHz Myriametric waves 5 LF 30 to 300 kHz Kilometric waves 6 MF 300 to 3 000 kHz Hectometric waves 7 HF 3 to 30 MHz Decametric waves 8 VHF 30 to 300 MHz Metric waves 9 UHF 300 to 3 000 MHz Decimetric waves 10 SHF 3 to 30 GHz Centimetric waves 11 EHF 30 to 300 GHz Millimetric waves 12 300 to 3 000 GHz Decimillimetric waves NOTE 1: “Band N” (N = band number) extends from 0.3 × 10N Hz to 3 × 10N Hz. NOTE 2: Prefix: k = kilo (103), M = mega (106), G = giga (109). Section II – Dates and times MOD 2.5 Whenever a date is used in connection with Coordinated Universal Time (UTC), this date shall be that at the prime meridian, the prime meridian corresponding to zero degrees geographical longitude. (WRC-15) ARTICLE 4 Assignment and use of frequencies ADD 4.24 Space research systems intended to operate in deep space may also use the space research service (deep space) allocations, with the same status as those allocations, when the spacecraft is near the Earth, such as during launch, early orbit, flying by the Earth and returning to the Earth. (WRC-15)