Allocations

 
U.S. Non-Federal-Government Allocations
5.45 - 5.68 MHz
AERONAUTICAL MOBILE (R)

FCC Rule Parts:
Aviation (87)

U.S. Federal Government Allocations
5.45 - 5.68 MHz
AERONAUTICAL MOBILE (R)


ITU Region 1 Allocations
5.45 - 5.48 MHz
FIXED
AERONAUTICAL MOBILE (OR)
LAND MOBILE


ITU Region 2 Allocations
5.45 - 5.48 MHz
AERONAUTICAL MOBILE (R)


ITU Region 3 Allocations
5.45 - 5.48 MHz
FIXED
AERONAUTICAL MOBILE (OR)
LAND MOBILE


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)

US283 In the bands 2850-3025 kHz, 3400-3500 kHz, 4650-4700 kHz, 5450-5680 kHz, 6525-6685 kHz, 10005-10100 kHz, 11275-11400 kHz, 13260-13360 kHz, and 17900-17970 kHz, frequencies may be authorized for non-Federal flight test purposes on the condition that harmful interference will not be caused to services operating in accordance with the Table of Frequency Allocations.

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

 
Access Broadband over Power Line (Access BPL)
Potential Future Amateur Radio Allocation


Related Documents, Links, and Multimedia:
FCC Proceeding (8)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 5450 kHz 5565 kHz 5680 kHz
Wavelength 55.0 m 53.9 m 52.8 m
Band designator(s) HF HF HF
Isotropic collecting area 240.8 m2 230.9 m2 221.7 m2
Free space loss (1 m) N/A (near field) N/A (near field) N/A (near field)
Free space loss (1 km) 47.2 dB 47.4 dB 47.2 dB
Free space loss (10 km) 67.2 dB 67.4 dB 67.2 dB
Free space loss (100 km) 87.2 dB 87.4 dB 87.2 dB
Free space loss (1000 km) 107.2 dB 107.4 dB 107.2 dB
Free space loss
(35,786 km = GEO orbit)
138.3 dB 138.4 dB 138.3 dB
Free space loss (378,370 km = Moon) 158.7 dB 158.9 dB 158.8 dB