Allocations

 
U.S. Non-Federal-Government Allocations
43.69 - 46.6 MHz
LAND MOBILE


U.S. Federal Government Allocations
42 - 46.6 MHz


ITU Region 1 Allocations
44 - 47 MHz
FIXED
MOBILE


ITU Region 2 Allocations
44 - 47 MHz
FIXED
MOBILE


ITU Region 3 Allocations
44 - 47 MHz
FIXED
MOBILE


SpectrumWiki


Footnotes


5.162 Additional allocation: in Australia, the band 44-47 MHz is also allocated to the broadcasting service on a primary basis. (WRC-12)

5.162A Additional allocation: in Germany, Austria, Belgium, Bosnia and Herzegovina, China, Vatican, Denmark, Spain, Estonia, the Russian Federation, Finland, France, Ireland, Iceland, Italy, Latvia, The Former Yugoslav Republic of Macedonia, Liechtenstein, Lithuania, Luxembourg, Monaco, Montenegro, Norway, the Netherlands, Poland, Portugal, the Czech Rep., the United Kingdom, Serbia, Slovenia, Sweden and Switzerland the band 46-68 MHz is also allocated to the radiolocation service on a secondary basis. This use is limited to the operation of wind profiler radars in accordance with Resolution 217 (WRC-97). (WRC-12)

NG124 In the bands 30.85-34, 37-38, 39-40, 42-47.41, 150.995-156.25, 158.715-159.465, 453.0125-453.9875, 458.0125-458.9875, 460.0125-465.6375, and 467.9375-467.9875 MHz, police licensees are authorized to operate low power transmitters on a secondary basis in accordance with the provisions of 47 CFR 2.803 and 90.20(e)(5).

NG141 In Alaska, the frequencies 42.4 MHz and 44.1 MHz are authorized on a primary basis for meteor burst communications by fixed stations in the Rural Radio Service operating under the provisions of 47 CFR part 22. In Alaska, the frequencies 44.2 MHz and 45.9 MHz are authorized on a primary basis for meteor burst communications by fixed private radio stations operating under the provisions of 47 CFR part 90. The private radio station frequencies may be used by Common Carrier stations on a secondary, noninterference basis and the Common Carrier frequencies may be used by private radio stations for meteor burst communications on a secondary, noninterference basis. Users shall cooperate to the extent practical to minimize potential interference. Stations utilizing meteor burst communications shall not cause harmful interference to stations of other radio services operating in accordance with the Table of Frequency Allocations.

SpectrumWiki

 
History of the Beep
Ocean Radar (WRC-2012)
Federal Government fixed/mobile
Single Channel Ground and Airborne Radio System (SINCGARS)
Access Broadband over Power Line (Access BPL)
2023 World Radiocommunication Conference (WRC-23) Preliminary Agenda Item 2.2
Experimental Ultra-Wideband (UWB) Systems
Apex Broadcasting Band


Related Documents, Links, and Multimedia:
FCC Proceeding (1)
Occupancy Measurements (10)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 42 MHz 44.5 MHz 47 MHz
Wavelength 7.1 m 6.7 m 6.4 m
Band designator(s) VHF VHF VHF
Isotropic collecting area 4.1 m2 3.6 m2 3.2 m2
Free space loss (1 m) 5.3 dB 5.4 dB 5.9 dB
Free space loss (1 km) 65.3 dB 65.4 dB 65.9 dB
Free space loss (10 km) 85.3 dB 85.4 dB 85.9 dB
Free space loss (100 km) 105.3 dB 105.4 dB 105.9 dB
Free space loss (1000 km) 125.3 dB 125.4 dB 125.9 dB
Free space loss
(35,786 km = GEO orbit)
156.4 dB 156.5 dB 157.0 dB
Free space loss (378,370 km = Moon) 176.9 dB 177.0 dB 177.5 dB