Allocations

 
U.S. Non-Federal-Government Allocations
235 - 267 MHz


U.S. Federal Government Allocations
235 - 267 MHz
FIXED
MOBILE


ITU Region 1 Allocations
235 - 267 MHz
FIXED
MOBILE


ITU Region 2 Allocations
235 - 267 MHz
FIXED
MOBILE


ITU Region 3 Allocations
235 - 267 MHz
FIXED
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)

5.252 Alternative allocation: in Botswana, Lesotho, Malawi, Mozambique, Namibia, South Africa, Swaziland, Zambia and Zimbabwe, the bands 230-238 MHz and 246-254 MHz are allocated to the broadcasting service on a primary basis, subject to agreement obtained under No. 9.21.

5.254 The bands 235-322 MHz and 335.4-399.9 MHz may be used by the mobile-satellite service, subject to agreement obtained under No. 9.21, on condition that stations in this service do not cause harmful interference to those of other services operating or planned to be operated in accordance with the Table of Frequency Allocations except for the additional allocation made in footnote No. 5.256A.

5.256 The frequency 243 MHz is the frequency in this band for use by survival craft stations and equipment used for survival purposes. (WRC-07)

5.256A Additional allocation: in China, the Russian Federation, Kazakhstan and Ukraine, the band 258 261 MHz is also allocated to the space research service (Earth-to-space) and space operation service (Earth-to-space) on a primary basis. Stations in the space research service (Earth-to-space) and space operation service (Earth-to-space) shall not cause harmful interference to, nor claim protection from, nor constrain the use and development of the mobile service systems and mobile-satellite service systems operating in the band. Stations in space research service (Earth-to-space) and space operation service (Earth-to-space) shall not constrain the future development of fixed service systems of other countries.

G27 In the bands 225-328.6 MHz, 335.4-399.9 MHz, and 1350-1390 MHz, the fixed and mobile services are limited to the military services.

G100 The bands 235-322 MHz and 335.4-399.9 MHz are also allocated on a primary basis to the mobile-satellite service, limited to military operations.


SpectrumWiki

 
Emergency Position Indicating Radiobeacon (EPIRB); Emergency Locator Transmitter (ELT); Personal Locating Beacon (PLB)
UHF Follow-On (UFO) Satellite Constellation
Federal Search and Rescue Communications on 243 MHz (NTIA)
Military Mobile-Satellite Communications (NTIA)
Area Common User System (ACUS) (NTIA)
Federal Maritime Mobile Communications (NTIA)
Military Aeronautical/ATC Communications and Telemetry (NTIA)
Military Battle Simulation Systems (NTIA)


Related Documents, Links, and Multimedia:
Occupancy Measurements (10)

Engineering Data

Lower Frequency Center Frequency Upper Frequency
Frequency 235 MHz 251 MHz 267 MHz
Wavelength 1.3 m 1.2 m 1.1 m
Band designator(s) VHF VHF VHF
Isotropic collecting area 1,295.1 cm2 1,135.2 cm2 1,003.2 cm2
Free space loss (1 m) 19.9 dB 20.4 dB 21.0 dB
Free space loss (1 km) 79.9 dB 80.4 dB 81.0 dB
Free space loss (10 km) 99.9 dB 100.4 dB 101.0 dB
Free space loss (100 km) 119.9 dB 120.4 dB 121.0 dB
Free space loss (1000 km) 139.9 dB 140.4 dB 141.0 dB
Free space loss
(35,786 km = GEO orbit)
170.9 dB 171.5 dB 172.1 dB
Free space loss (378,370 km = Moon) 191.4 dB 192.0 dB 192.5 dB