Allocations

 
U.S. Non-Federal-Government Allocations
138 - 144 MHz


U.S. Federal Government Allocations
138 - 144 MHz
FIXED
MOBILE

G30

ITU Region 1 Allocations
143.65 - 144 MHz
AERONAUTICAL MOBILE (OR)


ITU Region 2 Allocations
143.65 - 144 MHz
FIXED
MOBILE
RADIOLOCATION
Space research (space-to-Earth)


ITU Region 3 Allocations
143.65 - 144 MHz
FIXED
MOBILE
Space research (space-to-Earth)


SpectrumWiki

Band Uses (138 - 144 MHz)


Footnotes

5.207   Additional allocation: in Australia, the band 137-144 MHz is also allocated to the broadcasting service on a primary basis until that service can be accommodated within regional broadcasting allocations.

5.210   Additional allocation: in Italy, the Czech Rep. and the United Kingdom, the bands 138-143.6 MHz and 143.65-144 MHz are also allocated to the space research service (space-to-Earth) on a secondary basis. (WRC 07)

5.211   Additional allocation: in Germany, Saudi Arabia, Austria, Bahrain, Belgium, Denmark, the United Arab Emirates, Spain, Finland, Greece, Guinea, Ireland, Israel, Kenya, Kuwait, Lebanon, Liechtenstein, Luxembourg, North Macedonia, Mali, Malta, Montenegro, Norway, the Netherlands, Qatar, Slovakia, the United Kingdom, Serbia, Slovenia, Somalia, Sweden, Switzerland, Tanzania, Tunisia and Turkey, the frequency band 138 144 MHz is also allocated to the maritime mobile and land mobile services on a primary basis. (WRC 19)

5.212   Alternative allocation: in Angola, Botswana, Cameroon, the Central African Rep., Congo (Rep. of the), Eswatini, Gabon, Gambia, Ghana, Guinea, Iraq, Jordan, Lesotho, Liberia, Libya, Malawi, Mozambique, Namibia, Niger, Oman, Uganda, Syrian Arab Republic, the Dem. Rep. of the Congo, Rwanda, Sierra Leone, South Africa, Chad, Togo, Zambia and Zimbabwe, the frequency band 138-144 MHz is allocated to the fixed and mobile services on a primary basis. (WRC 19)

5.213   Additional allocation: in China, the band 138-144 MHz is also allocated to the radiolocation service on a primary basis.

5.214   Additional allocation: in Eritrea, Ethiopia, Kenya, North Macedonia, Montenegro, Serbia, Somalia, Sudan, South Sudan and Tanzania, the frequency band 138-144 MHz is also allocated to the fixed service on a primary basis. (WRC 19)

G30   In the bands 138-144 MHz, 148-149.9 MHz, and 150.05-150.8 MHz, the fixed and mobile services are limited primarily to operations by the military services.


SpectrumWiki

 
Amateur Radio 2 m Band
Orbcomm LEO Satellite Constellation




Related Documents, Links, and Multimedia:
Occupancy Measurements (10)
Band Plan (2)
Other (1)




Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 138 MHz 141 MHz 144 MHz
Wavelength 2.2 m 2.1 m 2.1 m
Band designator(s) VHF VHF VHF
Isotropic collecting area 3,755.5 cm2 3,597.4 cm2 3,449.1 cm2
Free space loss (1 m) 15.6 dB 15.4 dB 15.6 dB
Free space loss (1 km) 75.6 dB 75.4 dB 75.6 dB
Free space loss (10 km) 95.6 dB 95.4 dB 95.6 dB
Free space loss (100 km) 115.6 dB 115.4 dB 115.6 dB
Free space loss (1000 km) 135.6 dB 135.4 dB 135.6 dB
Free space loss
(35,786 km = GEO orbit)
166.7 dB 166.5 dB 166.7 dB
Free space loss (378,370 km = Moon) 187.2 dB 187.0 dB 187.2 dB
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