Allocations

 
U.S. Non-Federal-Government Allocations
0 - 9 kHz


U.S. Federal Government Allocations
0 - 9 kHz


ITU Region 1 Allocations
8.3 - 9 kHz
METEOROLOGICAL AIDS 5.54A 5.54B 5.54C


ITU Region 2 Allocations
8.3 - 9 kHz
METEOROLOGICAL AIDS 5.54A 5.54B 5.54C


ITU Region 3 Allocations
8.3 - 9 kHz
METEOROLOGICAL AIDS 5.54A 5.54B 5.54C


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Footnotes


5.53 Administrations authorizing the use of frequencies below 8.3 kHz shall ensure that no harmful interference is caused to services to which the bands above 8.3 kHz are allocated. (WRC-12)

5.54 Administrations conducting scientific research using frequencies below 8.3 kHz are urged to advise other administrations that may be concerned in order that such research may be afforded all practicable protection from harmful interference. (WRC-12)

5.54A Use of the 8.3-11.3 kHz frequency band by stations in the meteorological aids service is limited to passive use only. In the band 9-11.3 kHz, meteorological aids stations shall not claim protection from stations of the radionavigation service submitted for notification to the Bureau prior to 1 January 2013. For sharing between stations of the meteorological aids service and stations in the radionavigation service submitted for notification after this date, the most recent version of Recommendation ITU-R RS.1881 should be applied. (WRC-12)

5.54B Additional allocation: in Algeria, Saudi Arabia, Egypt, the United Arab Emirates, the Russian Federation, Iraq, Lebanon, Morocco, Qatar, the Syrian Arab Republic, Sudan and Tunisia, the frequency band 8.3-9 kHz is also allocated to the radionavigation, fixed and mobile services on a primary basis. (WRC-12)

5.54C Additional allocation: in China, the frequency band 8.3-9 kHz is also allocated to the maritime radionavigation and maritime mobile services on a primary basis. (WRC-12)

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Lightning Detection
Radiofrequency Identification (RFID)
Avalanche transceivers


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

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 0 Hz 4.5 kHz 9 kHz
Wavelength 0.0 N/A 66.6 km 33.3 km
Band designator(s) N/A VLF VLF
Isotropic collecting area N/A 353,188,467.5 m2 88,297,116.9 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) 10.8 dB 5.5 dB 11.5 dB
Free space loss (100 km) 30.8 dB 25.5 dB 31.5 dB
Free space loss (1000 km) 50.8 dB 45.5 dB 51.5 dB
Free space loss
(35,786 km = GEO orbit)
81.9 dB 76.6 dB 82.6 dB
Free space loss (378,370 km = Moon) 102.4 dB 97.1 dB 103.1 dB