Allocations

 
U.S. Non-Federal-Government Allocations
400.05 - 400.15 MHz
STANDARD FREQUENCY AND TIME SIGNAL-SATELLITE (400.1 MHz)


U.S. Federal Government Allocations
400.05 - 400.15 MHz
STANDARD FREQUENCY AND TIME SIGNAL-SATELLITE (400.1 MHz)


ITU Region 1 Allocations
400.05 - 400.15 MHz
STANDARD FREQUENCY AND TIME SIGNAL-SATELLITE (400.1 MHz)


ITU Region 2 Allocations
400.05 - 400.15 MHz
STANDARD FREQUENCY AND TIME SIGNAL-SATELLITE (400.1 MHz)


ITU Region 3 Allocations
400.05 - 400.15 MHz
STANDARD FREQUENCY AND TIME SIGNAL-SATELLITE (400.1 MHz)


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Footnotes

5.261   Emissions shall be confined in a band of ± 25 kHz about the standard frequency 400.1 MHz.

5.262   Additional allocation: in Saudi Arabia, Armenia, Azerbaijan, Bahrain, Belarus, Botswana, Colombia, Cuba, Egypt, the United Arab Emirates, Ecuador, the Russian Federation, Georgia, Hungary, Iran (Islamic Republic of), Iraq, Israel, Jordan, Kazakhstan, Kuwait, Liberia, Malaysia, Moldova, Oman, Uzbekistan, Pakistan, the Philippines, Qatar, the Syrian Arab Republic, Kyrgyzstan, Singapore, Somalia, Tajikistan, Chad, Turkmenistan and Ukraine, the band 400.05-401 MHz is also allocated to the fixed and mobile services on a primary basis. (WRC 12)


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WRC-19 Agenda Item 1.2
Radiosondes
IEEE 802.15.4 HRP UWB




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Occupancy Measurements (10)




Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 400.05 MHz 400.1 MHz 400.15 MHz
Wavelength 74.9 cm 74.9 cm 74.9 cm
Band designator(s) UHF UHF UHF
Isotropic collecting area 446.9 cm2 446.8 cm2 446.7 cm2
Free space loss (1 m) 24.5 dB 24.5 dB 24.5 dB
Free space loss (1 km) 84.5 dB 84.5 dB 84.5 dB
Free space loss (10 km) 104.5 dB 104.5 dB 104.5 dB
Free space loss (100 km) 124.5 dB 124.5 dB 124.5 dB
Free space loss (1000 km) 144.5 dB 144.5 dB 144.5 dB
Free space loss
(35,786 km = GEO orbit)
175.6 dB 175.6 dB 175.6 dB
Free space loss (378,370 km = Moon) 196.1 dB 196.1 dB 196.1 dB
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