Allocations

 
U.S. Non-Federal-Government Allocations
23.35 - 24.89 MHz
FIXED


U.S. Federal Government Allocations
23.35 - 24.89 MHz
FIXED
MOBILE except aeronautical mobile


ITU Region 1 Allocations
24.45 - 24.6 MHz
FIXED
LAND MOBILE
Radiolocation 5.132A


ITU Region 2 Allocations
24.45 - 24.65 MHz
FIXED
LAND MOBILE
RADIOLOCATION 5.132A


ITU Region 3 Allocations
24.45 - 24.6 MHz
FIXED
LAND MOBILE
Radiolocation 5.132A


SpectrumWiki


Footnotes


5.132A Stations in the radiolocation service shall not cause harmful interference to, or claim protection from, stations operating in the fixed or mobile services. Applications of the radiolocation service are limited to oceanographic radars operating in accordance with Resolution 612 (Rev.WRC-12). (WRC-12)

5.158 Alternative allocation: in Armenia, Austria, Belarus, Moldova, Uzbekistan and Kyrgyzstan, the frequency band 24450-24600 kHz is allocated to the fixed and land mobile services on a primary basis. (WRC-12)

US340 The band 2-30 MHz is available on a non-interference basis to Federal and non-Federal maritime and aeronautical stations for the purposes of measuring the quality of reception on radio channels. See 47 CFR 87.149 for the list of protected frequencies and bands within this frequency range. Actual communications shall be limited to those frequencies specifically allocated to the maritime mobile and aeronautical mobile services.

SpectrumWiki

 
Amateur Radio 12 m Band
Ocean Radar (WRC-2012)
Access Broadband over Power Line (Access BPL)


Related Documents, Links, and Multimedia:
FCC Proceeding (1)
Band Plan (1)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 23350 kHz 24120 kHz 24890 kHz
Wavelength 12.8 m 12.4 m 12.0 m
Band designator(s) HF HF HF
Isotropic collecting area 13.1 m2 12.3 m2 11.5 m2
Free space loss (1 m) 0.2 dB 0.1 dB 0.3 dB
Free space loss (1 km) 60.2 dB 60.1 dB 60.3 dB
Free space loss (10 km) 80.2 dB 80.1 dB 80.3 dB
Free space loss (100 km) 100.2 dB 100.1 dB 100.3 dB
Free space loss (1000 km) 120.2 dB 120.1 dB 120.3 dB
Free space loss
(35,786 km = GEO orbit)
151.3 dB 151.2 dB 151.3 dB
Free space loss (378,370 km = Moon) 171.8 dB 171.7 dB 171.8 dB