Allocations

 
U.S. Non-Federal-Government Allocations
5.68 - 5.73 MHz
AERONAUTICAL MOBILE (OR)


U.S. Federal Government Allocations
5.68 - 5.73 MHz
AERONAUTICAL MOBILE (OR)


ITU Region 1 Allocations
5.68 - 5.73 MHz
AERONAUTICAL MOBILE (OR)


ITU Region 2 Allocations
5.68 - 5.73 MHz
AERONAUTICAL MOBILE (OR)


ITU Region 3 Allocations
5.68 - 5.73 MHz
AERONAUTICAL MOBILE (OR)


SpectrumWiki


Footnotes


5.111 The carrier frequencies 2182 kHz, 3023 kHz, 5680 kHz, 8364 kHz and the frequencies 121.5 MHz, 156.525 MHz, 156.8 MHz and 243 MHz may also be used, in accordance with the procedures in force for terrestrial radiocommunication services, for search and rescue operations concerning manned space vehicles. The conditions for the use of the frequencies are prescribed in Article 31.

The same applies to the frequencies 10003 kHz, 14993 kHz and 19993 kHz, but in each of these cases emissions must be confined in a band of +/- 3 kHz about the frequency. (WRC-07)

5.115 The carrier (reference) frequencies 3023 kHz and 5680 kHz may also be used, in accordance with Article 31, by stations of the maritime mobile service engaged in coordinated search and rescue operations. (WRC-07)

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.


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Access Broadband over Power Line (Access BPL)


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FCC Proceeding (8)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 5680 kHz 5705 kHz 5730 kHz
Wavelength 52.8 m 52.5 m 52.3 m
Band designator(s) HF HF HF
Isotropic collecting area 221.7 m2 219.7 m2 217.8 m2
Free space loss (1 m) N/A (near field) N/A (near field) N/A (near field)
Free space loss (1 km) 47.5 dB 47.6 dB 47.6 dB
Free space loss (10 km) 67.5 dB 67.6 dB 67.6 dB
Free space loss (100 km) 87.5 dB 87.6 dB 87.6 dB
Free space loss (1000 km) 107.5 dB 107.6 dB 107.6 dB
Free space loss
(35,786 km = GEO orbit)
138.6 dB 138.6 dB 138.7 dB
Free space loss (378,370 km = Moon) 159.1 dB 159.1 dB 159.2 dB