Allocations

 
U.S. Non-Federal-Government Allocations
108 - 117.975 MHz
AERONAUTICAL RADIONAVIGATION

FCC Rule Parts:
Aviation (87)

U.S. Federal Government Allocations
108 - 117.975 MHz
AERONAUTICAL RADIONAVIGATION


ITU Region 1 Allocations
108 - 117.975 MHz
AERONAUTICAL RADIONAVIGATION


ITU Region 2 Allocations
108 - 117.975 MHz
AERONAUTICAL RADIONAVIGATION


ITU Region 3 Allocations
108 - 117.975 MHz
AERONAUTICAL RADIONAVIGATION


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Footnotes

5.187   Alternative allocation: in Albania, the band 81-87.5 MHz is allocated to the broadcasting service on a primary basis and used in accordance with the decisions contained in the Final Acts of the Special Regional Conference (Geneva, 1960).

5.197A   Additional allocation: the band 108-117.975 MHz is also allocated on a primary basis to the aeronautical mobile (R) service, limited to systems operating in accordance with recognized international aeronautical standards. Such use shall be in accordance with Resolution 413 (Rev.WRC 07)*. The use of the band 108-112 MHz by the aeronautical mobile (R) service shall be limited to systems composed of ground-based transmitters and associated receivers that provide navigational information in support of air navigation functions in accordance with recognized international aeronautical standards. (WRC-07)

US93   In the conterminous United States, the frequency 108.0 MHz may be authorized for use by VOR test facilities, the operation of which is not essential for the safety of life or property, subject to the condition that no interference is caused to the reception of FM broadcasting stations operating in the band 88-108 MHz. In the event that such interference does occur, the licensee or other agency authorized to operate the facility shall discontinue operation on 108 MHz and shall not resume operation until the interference has been eliminated or the complaint otherwise satisfied. VOR test facilities operating on 108 MHz will not be protected against interference caused by FM broadcasting stations operating in the band 88-108 MHz nor shall the authorization of a VOR test facility on 108 MHz preclude the Commission from authorizing additional FM broadcasting stations.


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FM Broadcast Band
Instrument Landing System
WRC-23 Agenda Item 1.7 Spectrum for Space-Based VHF Aeronautical Communications


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

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 108 MHz 112.9875 MHz 117.975 MHz
Wavelength 2.8 m 2.7 m 2.5 m
Band designator(s) VHF VHF VHF
Isotropic collecting area 6,131.7 cm2 5,602.4 cm2 5,138.7 cm2
Free space loss (1 m) 13.1 dB 13.5 dB 13.9 dB
Free space loss (1 km) 73.1 dB 73.5 dB 73.9 dB
Free space loss (10 km) 93.1 dB 93.5 dB 93.9 dB
Free space loss (100 km) 113.1 dB 113.5 dB 113.9 dB
Free space loss (1000 km) 133.1 dB 133.5 dB 133.9 dB
Free space loss
(35,786 km = GEO orbit)
164.2 dB 164.6 dB 165.0 dB
Free space loss (378,370 km = Moon) 184.7 dB 185.1 dB 185.4 dB
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