Allocations

 
U.S. Non-Federal-Government Allocations
9 - 14 kHz
RADIONAVIGATION US18

US2

U.S. Federal Government Allocations
9 - 14 kHz
RADIONAVIGATION US18

US2

ITU Region 1 Allocations
11.3 - 14 kHz
RADIONAVIGATION


ITU Region 2 Allocations
11.3 - 14 kHz
RADIONAVIGATION


ITU Region 3 Allocations
11.3 - 14 kHz
RADIONAVIGATION


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Footnotes


US18 In the bands 9-14 kHz, 90-110 kHz, 190-415 kHz, 510-535 kHz, and 2700-2900 MHz, navigation aids in the U.S. and its insular areas are normally operated by the Federal Government. However, authorizations may be made by the FCC for non-Federal operations in these bands subject to the conclusion of appropriate arrangements between the FCC and the Federal agencies concerned and upon special showing of need for service which the Federal Government is not yet prepared to render.

US2 In the band 9-490 kHz, electric utilities operate Power Line Carrier (PLC) systems on power transmission lines for communications important to the reliability and security of electric service to the public. These PLC systems operate under the provisions of 47 CFR part 15, or Chapter 8 of the NTIA Manual, on an unprotected and non-interference basis with respect to authorized radio users. Notification of intent to place new or revised radio frequency assignments or PLC frequency uses in the band 9-490 kHz is to be made in accordance with the Rules and Regulations of the FCC and NTIA, and users are urged to minimize potential interference to the extent practicable. This footnote does not provide any allocation status to PLC radio frequency uses.

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VLF Radio Stations
Russian Radionavigation System Alpha (RSDN-20)
Lightning Detection
Radiofrequency Identification (RFID)
Omega Radionavigation System


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

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 9 kHz 11.5 kHz 14 kHz
Wavelength 33.3 km 26.1 km 21.4 km
Band designator(s) VLF VLF VLF
Isotropic collecting area 88,297,116.9 m2 54,079,897.7 m2 36,490,135.0 m2
Free space loss (1 m) N/A (near field) N/A (near field) N/A (near field)
Free space loss (1 km) N/A (near field) N/A (near field) N/A (near field)
Free space loss (10 km) 13.5 dB 13.7 dB 15.4 dB
Free space loss (100 km) 33.5 dB 33.7 dB 35.4 dB
Free space loss (1000 km) 53.5 dB 53.7 dB 55.4 dB
Free space loss
(35,786 km = GEO orbit)
84.6 dB 84.7 dB 86.4 dB
Free space loss (378,370 km = Moon) 105.1 dB 105.2 dB 106.9 dB